From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Riley Park <riley.park@meino.net>
Date: Fri, 29 Jan 2021 17:21:55 +0100
Subject: [PATCH] Adventure

Co-authored-by: zml <zml@stellardrift.ca>
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>

diff --git a/build.gradle.kts b/build.gradle.kts
index 98afa6a25131dc626ea7a5122f33df6bd2d39178..eefc024acc3e14ae21855df7f2f358bd1e0a9e38 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -8,18 +8,37 @@ java {
     withJavadocJar()
 }
 
+val adventureVersion = "4.10.1"
+val apiAndDocs: Configuration by configurations.creating {
+    attributes {
+        attribute(Category.CATEGORY_ATTRIBUTE, objects.named(Category.DOCUMENTATION))
+        attribute(Bundling.BUNDLING_ATTRIBUTE, objects.named(Bundling.EXTERNAL))
+        attribute(DocsType.DOCS_TYPE_ATTRIBUTE, objects.named(DocsType.SOURCES))
+        attribute(Usage.USAGE_ATTRIBUTE, objects.named(Usage.JAVA_RUNTIME))
+    }
+}
+configurations.api {
+    extendsFrom(apiAndDocs)
+}
+
 dependencies {
     // api dependencies are listed transitively to API consumers
     api("commons-lang:commons-lang:2.6")
     api("com.google.guava:guava:31.0.1-jre")
     api("com.google.code.gson:gson:2.8.9")
-    api("net.md-5:bungeecord-chat:1.16-R0.4")
+    api("net.md-5:bungeecord-chat:1.16-R0.4-deprecated+build.6") // Paper
     api("org.yaml:snakeyaml:1.30")
     // Paper start
     api("com.googlecode.json-simple:json-simple:1.1.1") {
         isTransitive = false // includes junit
     }
     api("it.unimi.dsi:fastutil:8.5.6")
+    apiAndDocs(platform("net.kyori:adventure-bom:$adventureVersion"))
+    apiAndDocs("net.kyori:adventure-api")
+    apiAndDocs("net.kyori:adventure-text-minimessage")
+    apiAndDocs("net.kyori:adventure-text-serializer-gson")
+    apiAndDocs("net.kyori:adventure-text-serializer-legacy")
+    apiAndDocs("net.kyori:adventure-text-serializer-plain")
     // Paper end
 
     compileOnly("org.apache.maven:maven-resolver-provider:3.8.4")
@@ -77,9 +96,24 @@ tasks.withType<Javadoc> {
         "https://guava.dev/releases/31.0.1-jre/api/docs/",
         "https://javadoc.io/doc/org.yaml/snakeyaml/1.30/",
         "https://javadoc.io/doc/org.jetbrains/annotations/23.0.0/", // Paper - we don't want Java 5 annotations
-        "https://javadoc.io/doc/net.md-5/bungeecord-chat/1.16-R0.4/",
+        // Paper start
+        //"https://javadoc.io/doc/net.md-5/bungeecord-chat/1.16-R0.4/", // don't link to bungee chat
+        "https://jd.adventure.kyori.net/api/$adventureVersion/",
+        "https://jd.adventure.kyori.net/text-minimessage/$adventureVersion/",
+        "https://jd.adventure.kyori.net/text-serializer-gson/$adventureVersion/",
+        "https://jd.adventure.kyori.net/text-serializer-legacy/$adventureVersion/",
+        "https://jd.adventure.kyori.net/text-serializer-plain/$adventureVersion/",
+        // Paper end
     )
 
+    inputs.files(apiAndDocs).ignoreEmptyDirectories().withPropertyName(apiAndDocs.name + "-configuration")
+    doFirst {
+        options.addStringOption(
+            "sourcepath",
+            apiAndDocs.resolvedConfiguration.files.joinToString(separator = File.pathSeparator, transform = File::getPath)
+        )
+    }
+
     // workaround for https://github.com/gradle/gradle/issues/4046
     inputs.dir("src/main/javadoc").withPropertyName("javadoc-sourceset")
     doLast {
diff --git a/src/main/java/io/papermc/paper/chat/ChatRenderer.java b/src/main/java/io/papermc/paper/chat/ChatRenderer.java
new file mode 100644
index 0000000000000000000000000000000000000000..2fc47afbb233e6e5727a7b672f61b88ad3bab097
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chat/ChatRenderer.java
@@ -0,0 +1,78 @@
+package io.papermc.paper.chat;
+
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * A chat renderer is responsible for rendering chat messages sent by {@link Player}s to the server.
+ */
+@FunctionalInterface
+public interface ChatRenderer {
+    /**
+     * Renders a chat message. This will be called once for each receiving {@link Audience}.
+     *
+     * @param source the message source
+     * @param sourceDisplayName the display name of the source player
+     * @param message the chat message
+     * @param viewer the receiving {@link Audience}
+     * @return a rendered chat message
+     */
+    @ApiStatus.OverrideOnly
+    @NotNull
+    Component render(@NotNull Player source, @NotNull Component sourceDisplayName, @NotNull Component message, @NotNull Audience viewer);
+
+    /**
+     * Create a new instance of the default {@link ChatRenderer}.
+     *
+     * @return a new {@link ChatRenderer}
+     */
+    @NotNull
+    static ChatRenderer defaultRenderer() {
+        return viewerUnaware((source, sourceDisplayName, message) -> Component.translatable("chat.type.text", sourceDisplayName, message));
+    }
+
+    /**
+     * Creates a new viewer-unaware {@link ChatRenderer}, which will render the chat message a single time,
+     * displaying the same rendered message to every viewing {@link Audience}.
+     *
+     * @param renderer the viewer unaware renderer
+     * @return a new {@link ChatRenderer}
+     */
+    @NotNull
+    static ChatRenderer viewerUnaware(final @NotNull ViewerUnaware renderer) {
+        return new ChatRenderer() {
+            private @MonotonicNonNull Component message;
+
+            @Override
+            public @NotNull Component render(final @NotNull Player source, final @NotNull Component sourceDisplayName, final @NotNull Component message, final @NotNull Audience viewer) {
+                if (this.message == null) {
+                    this.message = renderer.render(source, sourceDisplayName, message);
+                }
+                return this.message;
+            }
+        };
+    }
+
+    /**
+     * Similar to {@link ChatRenderer}, but without knowledge of the message viewer.
+     *
+     * @see ChatRenderer#viewerUnaware(ViewerUnaware)
+     */
+    interface ViewerUnaware {
+        /**
+         * Renders a chat message.
+         *
+         * @param source the message source
+         * @param sourceDisplayName the display name of the source player
+         * @param message the chat message
+         * @return a rendered chat message
+         */
+        @ApiStatus.OverrideOnly
+        @NotNull
+        Component render(@NotNull Player source, @NotNull Component sourceDisplayName, @NotNull Component message);
+    }
+}
diff --git a/src/main/java/io/papermc/paper/event/player/AbstractChatEvent.java b/src/main/java/io/papermc/paper/event/player/AbstractChatEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..fa03a5cb2d3e3e0a60d84bacc911d96c454f81da
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/player/AbstractChatEvent.java
@@ -0,0 +1,112 @@
+package io.papermc.paper.event.player;
+
+import java.util.Set;
+import io.papermc.paper.chat.ChatRenderer;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+import static java.util.Objects.requireNonNull;
+
+/**
+ * An abstract implementation of a chat event, handling shared logic.
+ */
+public abstract class AbstractChatEvent extends PlayerEvent implements Cancellable {
+    private final Set<Audience> viewers;
+    private final Component originalMessage;
+    private ChatRenderer renderer;
+    private Component message;
+    private boolean cancelled = false;
+
+    AbstractChatEvent(final boolean async, final @NotNull Player player, final @NotNull Set<Audience> viewers, final @NotNull ChatRenderer renderer, final @NotNull Component message, final @NotNull Component originalMessage) {
+        super(player, async);
+        this.viewers = viewers;
+        this.renderer = renderer;
+        this.message = message;
+        this.originalMessage = originalMessage;
+    }
+
+    /**
+     * Gets a set of {@link Audience audiences} that this chat message will be displayed to.
+     *
+     * <p>The set returned is not guaranteed to be mutable and may auto-populate
+     * on access. Any listener accessing the returned set should be aware that
+     * it may reduce performance for a lazy set implementation.</p>
+     *
+     * <p>Listeners should be aware that modifying the list may throw {@link
+     * UnsupportedOperationException} if the event caller provides an
+     * unmodifiable set.</p>
+     *
+     * @return a set of {@link Audience audiences} who will receive the chat message
+     */
+    @NotNull
+    public final Set<Audience> viewers() {
+        return this.viewers;
+    }
+
+    /**
+     * Sets the chat renderer.
+     *
+     * @param renderer the chat renderer
+     * @throws NullPointerException if {@code renderer} is {@code null}
+     */
+    public final void renderer(final @NotNull ChatRenderer renderer) {
+        this.renderer = requireNonNull(renderer, "renderer");
+    }
+
+    /**
+     * Gets the chat renderer.
+     *
+     * @return the chat renderer
+     */
+    @NotNull
+    public final ChatRenderer renderer() {
+        return this.renderer;
+    }
+
+    /**
+     * Gets the user-supplied message.
+     * The return value will reflect changes made using {@link #message(Component)}.
+     *
+     * @return the user-supplied message
+     */
+    @NotNull
+    public final Component message() {
+        return this.message;
+    }
+
+    /**
+     * Sets the user-supplied message.
+     *
+     * @param message the user-supplied message
+     * @throws NullPointerException if {@code message} is {@code null}
+     */
+    public final void message(final @NotNull Component message) {
+        this.message = requireNonNull(message, "message");
+    }
+
+    /**
+     * Gets the original and unmodified user-supplied message.
+     * The return value will <b>not</b> reflect changes made using
+     * {@link #message(Component)}.
+     *
+     * @return the original user-supplied message
+     */
+    @NotNull
+    public final Component originalMessage() {
+        return this.originalMessage;
+    }
+
+    @Override
+    public final boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public final void setCancelled(final boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/event/player/AsyncChatEvent.java b/src/main/java/io/papermc/paper/event/player/AsyncChatEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..0d9e3c23027e3af90cb70e4bb6fb0ac1da35fc4d
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/player/AsyncChatEvent.java
@@ -0,0 +1,31 @@
+package io.papermc.paper.event.player;
+
+import java.util.Set;
+import io.papermc.paper.chat.ChatRenderer;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * An event fired when a {@link Player} sends a chat message to the server.
+ */
+public final class AsyncChatEvent extends AbstractChatEvent {
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    public AsyncChatEvent(final boolean async, final @NotNull Player player, final @NotNull Set<Audience> viewers, final @NotNull ChatRenderer renderer, final @NotNull Component message, final @NotNull Component originalMessage) {
+        super(async, player, viewers, renderer, message, originalMessage);
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/event/player/ChatEvent.java b/src/main/java/io/papermc/paper/event/player/ChatEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..eb179aae1e1d2ce842442e49fe275827a430ccd0
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/player/ChatEvent.java
@@ -0,0 +1,36 @@
+package io.papermc.paper.event.player;
+
+import java.util.Set;
+import io.papermc.paper.chat.ChatRenderer;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import org.bukkit.Warning;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * An event fired when a {@link Player} sends a chat message to the server.
+ *
+ * @deprecated Listening to this event forces chat to wait for the main thread, delaying chat messages. It is recommended to use {@link AsyncChatEvent} instead, wherever possible.
+ */
+@Deprecated
+@Warning(reason = "Listening to this event forces chat to wait for the main thread, delaying chat messages.")
+public final class ChatEvent extends AbstractChatEvent {
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    public ChatEvent(final @NotNull Player player, final @NotNull Set<Audience> viewers, final @NotNull ChatRenderer renderer, final @NotNull Component message, final @NotNull Component originalMessage) {
+        super(false, player, viewers, renderer, message, originalMessage);
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/text/PaperComponents.java b/src/main/java/io/papermc/paper/text/PaperComponents.java
new file mode 100644
index 0000000000000000000000000000000000000000..15ecb12fd2fefcac96edbaef7cdd487a1d2c5641
--- /dev/null
+++ b/src/main/java/io/papermc/paper/text/PaperComponents.java
@@ -0,0 +1,104 @@
+package io.papermc.paper.text;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.flattener.ComponentFlattener;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
+import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
+import net.kyori.adventure.text.serializer.plain.PlainComponentSerializer;
+import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
+import org.bukkit.Bukkit;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Paper API-specific methods for working with {@link Component}s and related.
+ */
+public final class PaperComponents {
+    private PaperComponents() {
+        throw new RuntimeException("PaperComponents is not to be instantiated!");
+    }
+
+    /**
+     * Return a component flattener that can use game data to resolve extra information about components.
+     *
+     * @return a component flattener
+     */
+    public static @NotNull ComponentFlattener flattener() {
+        return Bukkit.getUnsafe().componentFlattener();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert components to
+     * a plain-text string.
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires access to implementation details.</p>
+     *
+     * @deprecated will be removed in adventure 5.0.0, use {@link #plainTextSerializer()}
+     * @return a serializer to plain text
+     */
+    @Deprecated
+    public static @NotNull PlainComponentSerializer plainSerializer() {
+        return Bukkit.getUnsafe().plainComponentSerializer();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert components to
+     * a plain-text string.
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires access to implementation details.</p>
+     *
+     * @return a serializer to plain text
+     */
+    public static @NotNull PlainTextComponentSerializer plainTextSerializer() {
+        return Bukkit.getUnsafe().plainTextSerializer();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert to and from the
+     * standard JSON serialization format using Gson.
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires implementation details, such as legacy
+     * (pre-1.16) hover events.</p>
+     *
+     * @return a json component serializer
+     */
+    public static @NotNull GsonComponentSerializer gsonSerializer() {
+        return Bukkit.getUnsafe().gsonComponentSerializer();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert to and from the
+     * standard JSON serialization format using Gson, downsampling any RGB colors
+     * to their nearest {@link NamedTextColor} counterpart.
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires implementation details, such as legacy
+     * (pre-1.16) hover events.</p>
+     *
+     * @return a json component serializer
+     */
+    public static @NotNull GsonComponentSerializer colorDownsamplingGsonSerializer() {
+        return Bukkit.getUnsafe().colorDownsamplingGsonComponentSerializer();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert to and from the
+     * legacy component format used by Bukkit. This serializer uses the
+     * {@link LegacyComponentSerializer.Builder#useUnusualXRepeatedCharacterHexFormat()}
+     * option to match upstream behavior.
+     *
+     * <p>This legacy serializer uses the standard section symbol to mark
+     * formatting characters.</p>
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires access to implementation details.</p>
+     *
+     * @return a section serializer
+     */
+    public static @NotNull LegacyComponentSerializer legacySectionSerializer() {
+        return Bukkit.getUnsafe().legacyComponentSerializer();
+    }
+}
diff --git a/src/main/java/org/bukkit/Bukkit.java b/src/main/java/org/bukkit/Bukkit.java
index c15861905d7af679c4f6ffc27719a900b0fe4284..d5fdc57ffcfac4eb18d7fbf44ce13257915b4afb 100644
--- a/src/main/java/org/bukkit/Bukkit.java
+++ b/src/main/java/org/bukkit/Bukkit.java
@@ -357,7 +357,9 @@ public final class Bukkit {
      *
      * @param message the message
      * @return the number of players
+     * @deprecated in favour of {@link Server#broadcast(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public static int broadcastMessage(@NotNull String message) {
         return server.broadcastMessage(message);
     }
@@ -1051,6 +1053,19 @@ public final class Bukkit {
         server.shutdown();
     }
 
+    // Paper start
+    /**
+     * Broadcast a message to all players.
+     * <p>
+     * This is the same as calling {@link #broadcast(net.kyori.adventure.text.Component,
+     * java.lang.String)} with the {@link Server#BROADCAST_CHANNEL_USERS} permission.
+     *
+     * @param message the message
+     * @return the number of players
+     */
+    public static int broadcast(@NotNull net.kyori.adventure.text.Component message) {
+        return server.broadcast(message);
+    }
     /**
      * Broadcasts the specified message to every user with the given
      * permission name.
@@ -1060,6 +1075,21 @@ public final class Bukkit {
      *     permissibles} must have to receive the broadcast
      * @return number of message recipients
      */
+    public static int broadcast(@NotNull net.kyori.adventure.text.Component message, @NotNull String permission) {
+        return server.broadcast(message, permission);
+    }
+    // Paper end
+    /**
+     * Broadcasts the specified message to every user with the given
+     * permission name.
+     *
+     * @param message message to broadcast
+     * @param permission the required permission {@link Permissible
+     *     permissibles} must have to receive the broadcast
+     * @return number of message recipients
+     * @deprecated in favour of {@link #broadcast(net.kyori.adventure.text.Component, String)}
+     */
+    @Deprecated // Paper
     public static int broadcast(@NotNull String message, @NotNull String permission) {
         return server.broadcast(message, permission);
     }
@@ -1298,6 +1328,7 @@ public final class Bukkit {
         return server.createInventory(owner, type);
     }
 
+    // Paper start
     /**
      * Creates an empty inventory with the specified type and title. If the type
      * is {@link InventoryType#CHEST}, the new inventory has a size of 27;
@@ -1323,6 +1354,38 @@ public final class Bukkit {
      * @see InventoryType#isCreatable()
      */
     @NotNull
+    public static Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type, @NotNull net.kyori.adventure.text.Component title) {
+        return server.createInventory(owner, type, title);
+    }
+    // Paper end
+
+    /**
+     * Creates an empty inventory with the specified type and title. If the type
+     * is {@link InventoryType#CHEST}, the new inventory has a size of 27;
+     * otherwise the new inventory has the normal size for its type.<br>
+     * It should be noted that some inventory types do not support titles and
+     * may not render with said titles on the Minecraft client.
+     * <br>
+     * {@link InventoryType#WORKBENCH} will not process crafting recipes if
+     * created with this method. Use
+     * {@link Player#openWorkbench(Location, boolean)} instead.
+     * <br>
+     * {@link InventoryType#ENCHANTING} will not process {@link ItemStack}s
+     * for possible enchanting results. Use
+     * {@link Player#openEnchanting(Location, boolean)} instead.
+     *
+     * @param owner The holder of the inventory; can be null if there's no holder.
+     * @param type The type of inventory to create.
+     * @param title The title of the inventory, to be displayed when it is viewed.
+     * @return The new inventory.
+     * @throws IllegalArgumentException if the {@link InventoryType} cannot be
+     * viewed.
+     * @deprecated in favour of {@link #createInventory(InventoryHolder, InventoryType, net.kyori.adventure.text.Component)}
+     *
+     * @see InventoryType#isCreatable()
+     */
+    @Deprecated // Paper
+    @NotNull
     public static Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type, @NotNull String title) {
         return server.createInventory(owner, type, title);
     }
@@ -1341,6 +1404,7 @@ public final class Bukkit {
         return server.createInventory(owner, size);
     }
 
+    // Paper start
     /**
      * Creates an empty inventory of type {@link InventoryType#CHEST} with the
      * specified size and title.
@@ -1353,10 +1417,30 @@ public final class Bukkit {
      * @throws IllegalArgumentException if the size is not a multiple of 9
      */
     @NotNull
+    public static Inventory createInventory(@Nullable InventoryHolder owner, int size, @NotNull net.kyori.adventure.text.Component title) throws IllegalArgumentException {
+        return server.createInventory(owner, size, title);
+    }
+    // Paper end
+
+    /**
+     * Creates an empty inventory of type {@link InventoryType#CHEST} with the
+     * specified size and title.
+     *
+     * @param owner the holder of the inventory, or null to indicate no holder
+     * @param size a multiple of 9 as the size of inventory to create
+     * @param title the title of the inventory, displayed when inventory is
+     *     viewed
+     * @return a new inventory
+     * @throws IllegalArgumentException if the size is not a multiple of 9
+     * @deprecated in favour of {@link #createInventory(InventoryHolder, InventoryType, net.kyori.adventure.text.Component)}
+     */
+    @Deprecated // Paper
+    @NotNull
     public static Inventory createInventory(@Nullable InventoryHolder owner, int size, @NotNull String title) throws IllegalArgumentException {
         return server.createInventory(owner, size, title);
     }
 
+    // Paper start
     /**
      * Creates an empty merchant.
      *
@@ -1364,7 +1448,20 @@ public final class Bukkit {
      * when the merchant inventory is viewed
      * @return a new merchant
      */
+    public static @NotNull Merchant createMerchant(@Nullable net.kyori.adventure.text.Component title) {
+        return server.createMerchant(title);
+    }
+    // Paper start
+    /**
+     * Creates an empty merchant.
+     *
+     * @param title the title of the corresponding merchant inventory, displayed
+     * when the merchant inventory is viewed
+     * @return a new merchant
+     * @deprecated in favour of {@link #createMerchant(net.kyori.adventure.text.Component)}
+     */
     @NotNull
+    @Deprecated // Paper
     public static Merchant createMerchant(@Nullable String title) {
         return server.createMerchant(title);
     }
@@ -1470,22 +1567,47 @@ public final class Bukkit {
         return server.isPrimaryThread();
     }
 
+    // Paper start
+    /**
+     * Gets the message that is displayed on the server list.
+     *
+     * @return the server's MOTD
+     */
+    @NotNull public static net.kyori.adventure.text.Component motd() {
+        return server.motd();
+    }
+    // Paper end
+
     /**
      * Gets the message that is displayed on the server list.
      *
      * @return the servers MOTD
+     * @deprecated in favour of {@link #motd()}
      */
     @NotNull
+    @Deprecated // Paper
     public static String getMotd() {
         return server.getMotd();
     }
 
+    // Paper start
+    /**
+     * Gets the default message that is displayed when the server is stopped.
+     *
+     * @return the shutdown message
+     */
+    public static @Nullable net.kyori.adventure.text.Component shutdownMessage() {
+        return server.shutdownMessage();
+    }
+    // Paper end
     /**
      * Gets the default message that is displayed when the server is stopped.
      *
      * @return the shutdown message
+     * @deprecated in favour of {@link #shutdownMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public static String getShutdownMessage() {
         return server.getShutdownMessage();
     }
diff --git a/src/main/java/org/bukkit/Keyed.java b/src/main/java/org/bukkit/Keyed.java
index 32c92621c2c15eec14c50965f5ecda00c46e6c80..e076d447da62445764a9776ee2554c077637d270 100644
--- a/src/main/java/org/bukkit/Keyed.java
+++ b/src/main/java/org/bukkit/Keyed.java
@@ -5,7 +5,7 @@ import org.jetbrains.annotations.NotNull;
 /**
  * Represents an object which has a {@link NamespacedKey} attached to it.
  */
-public interface Keyed {
+public interface Keyed extends net.kyori.adventure.key.Keyed { // Paper -- extend Adventure Keyed
 
     /**
      * Return the namespaced identifier for this object.
@@ -14,4 +14,16 @@ public interface Keyed {
      */
     @NotNull
     NamespacedKey getKey();
+
+    // Paper start
+    /**
+     * Returns the unique identifier for this object.
+     *
+     * @return this object's key
+     */
+    @Override
+    default net.kyori.adventure.key.@NotNull Key key() {
+        return this.getKey();
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/Nameable.java b/src/main/java/org/bukkit/Nameable.java
index fee814e01a653d2b53c56e8b566383ca44aa5346..b71b780792b672b37c8fe65d43489b860a227381 100644
--- a/src/main/java/org/bukkit/Nameable.java
+++ b/src/main/java/org/bukkit/Nameable.java
@@ -4,6 +4,30 @@ import org.jetbrains.annotations.Nullable;
 
 public interface Nameable {
 
+    // Paper start
+    /**
+     * Gets the custom name.
+     *
+     * <p>This value has no effect on players, they will always use their real name.</p>
+     *
+     * @return the custom name
+     */
+    @Nullable net.kyori.adventure.text.Component customName();
+
+    /**
+     * Sets the custom name.
+     *
+     * <p>This name will be used in death messages and can be sent to the client as a nameplate over the mob.</p>
+     *
+     * <p>Setting the name to {@code null} will clear it.</p>
+     *
+     * <p>This value has no effect on players, they will always use their real name.</p>
+     *
+     * @param customName the custom name to set
+     */
+    void customName(final @Nullable net.kyori.adventure.text.Component customName);
+    // Paper end
+
     /**
      * Gets the custom name on a mob or block. If there is no name this method
      * will return null.
@@ -11,8 +35,10 @@ public interface Nameable {
      * This value has no effect on players, they will always use their real
      * name.
      *
+     * @deprecated in favour of {@link #customName()}
      * @return name of the mob/block or null
      */
+    @Deprecated // Paper
     @Nullable
     public String getCustomName();
 
@@ -25,7 +51,9 @@ public interface Nameable {
      * This value has no effect on players, they will always use their real
      * name.
      *
+     * @deprecated in favour of {@link #customName(net.kyori.adventure.text.Component)}
      * @param name the name to set
      */
+    @Deprecated // Paper
     public void setCustomName(@Nullable String name);
 }
diff --git a/src/main/java/org/bukkit/NamespacedKey.java b/src/main/java/org/bukkit/NamespacedKey.java
index 803fa0019869127ee8c7e4fb1777a59c43e66f8a..c65f0d6569c130b4920a9e71ad24af6427f1f030 100644
--- a/src/main/java/org/bukkit/NamespacedKey.java
+++ b/src/main/java/org/bukkit/NamespacedKey.java
@@ -19,7 +19,7 @@ import org.jetbrains.annotations.Nullable;
  * underscores, hyphens, and forward slashes.
  *
  */
-public final class NamespacedKey {
+public final class NamespacedKey implements net.kyori.adventure.key.Key { // Paper - implement Key
 
     /**
      * The namespace representing all inbuilt keys.
@@ -212,4 +212,24 @@ public final class NamespacedKey {
     public static NamespacedKey fromString(@NotNull String key) {
         return fromString(key, null);
     }
+
+    // Paper start
+    @NotNull
+    @Override
+    public String namespace() {
+        return this.getNamespace();
+    }
+
+    @NotNull
+    @Override
+    public String value() {
+        return this.getKey();
+    }
+
+    @NotNull
+    @Override
+    public String asString() {
+        return this.namespace + ':' + this.key;
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/Server.java b/src/main/java/org/bukkit/Server.java
index cf53aead2eb5a52f1505ca694e95108fce28aa18..14b078e8fa4347dd0e186e5847693904e4ceb9df 100644
--- a/src/main/java/org/bukkit/Server.java
+++ b/src/main/java/org/bukkit/Server.java
@@ -58,13 +58,13 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents a server implementation.
  */
-public interface Server extends PluginMessageRecipient {
+public interface Server extends PluginMessageRecipient, net.kyori.adventure.audience.ForwardingAudience { // Paper
 
     /**
      * Used for all administrative messages, such as an operator using a
      * command.
      * <p>
-     * For use in {@link #broadcast(java.lang.String, java.lang.String)}.
+     * For use in {@link #broadcast(net.kyori.adventure.text.Component, java.lang.String)}.
      */
     public static final String BROADCAST_CHANNEL_ADMINISTRATIVE = "bukkit.broadcast.admin";
 
@@ -72,7 +72,7 @@ public interface Server extends PluginMessageRecipient {
      * Used for all announcement messages, such as informing users that a
      * player has joined.
      * <p>
-     * For use in {@link #broadcast(java.lang.String, java.lang.String)}.
+     * For use in {@link #broadcast(net.kyori.adventure.text.Component, java.lang.String)}.
      */
     public static final String BROADCAST_CHANNEL_USERS = "bukkit.broadcast.user";
 
@@ -294,7 +294,9 @@ public interface Server extends PluginMessageRecipient {
      *
      * @param message the message
      * @return the number of players
+     * @deprecated use {@link #broadcast(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public int broadcastMessage(@NotNull String message);
 
     /**
@@ -894,8 +896,33 @@ public interface Server extends PluginMessageRecipient {
      * @param permission the required permission {@link Permissible
      *     permissibles} must have to receive the broadcast
      * @return number of message recipients
+     * @deprecated in favour of {@link #broadcast(net.kyori.adventure.text.Component, String)}
      */
+    @Deprecated // Paper
     public int broadcast(@NotNull String message, @NotNull String permission);
+    // Paper start
+    /**
+     * Broadcast a message to all players.
+     * <p>
+     * This is the same as calling {@link #broadcast(net.kyori.adventure.text.Component,
+     * java.lang.String)} with the {@link #BROADCAST_CHANNEL_USERS} permission.
+     *
+     * @param message the message
+     * @return the number of players
+     */
+    int broadcast(@NotNull net.kyori.adventure.text.Component message);
+
+    /**
+     * Broadcasts the specified message to every user with the given
+     * permission name.
+     *
+     * @param message message to broadcast
+     * @param permission the required permission {@link Permissible
+     *     permissibles} must have to receive the broadcast
+     * @return number of message recipients
+     */
+    int broadcast(@NotNull net.kyori.adventure.text.Component message, @NotNull String permission);
+    // Paper end
 
     /**
      * Gets the player by the given name, regardless if they are offline or
@@ -1093,6 +1120,7 @@ public interface Server extends PluginMessageRecipient {
     @NotNull
     Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type);
 
+    // Paper start
     /**
      * Creates an empty inventory with the specified type and title. If the type
      * is {@link InventoryType#CHEST}, the new inventory has a size of 27;
@@ -1118,6 +1146,36 @@ public interface Server extends PluginMessageRecipient {
      * @see InventoryType#isCreatable()
      */
     @NotNull
+    Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type, @NotNull net.kyori.adventure.text.Component title);
+    // Paper end
+
+    /**
+     * Creates an empty inventory with the specified type and title. If the type
+     * is {@link InventoryType#CHEST}, the new inventory has a size of 27;
+     * otherwise the new inventory has the normal size for its type.<br>
+     * It should be noted that some inventory types do not support titles and
+     * may not render with said titles on the Minecraft client.
+     * <br>
+     * {@link InventoryType#WORKBENCH} will not process crafting recipes if
+     * created with this method. Use
+     * {@link Player#openWorkbench(Location, boolean)} instead.
+     * <br>
+     * {@link InventoryType#ENCHANTING} will not process {@link ItemStack}s
+     * for possible enchanting results. Use
+     * {@link Player#openEnchanting(Location, boolean)} instead.
+     *
+     * @param owner The holder of the inventory; can be null if there's no holder.
+     * @param type The type of inventory to create.
+     * @param title The title of the inventory, to be displayed when it is viewed.
+     * @return The new inventory.
+     * @throws IllegalArgumentException if the {@link InventoryType} cannot be
+     * viewed.
+     * @deprecated in favour of {@link #createInventory(InventoryHolder, InventoryType, net.kyori.adventure.text.Component)}
+     *
+     * @see InventoryType#isCreatable()
+     */
+    @Deprecated // Paper
+    @NotNull
     Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type, @NotNull String title);
 
     /**
@@ -1132,6 +1190,22 @@ public interface Server extends PluginMessageRecipient {
     @NotNull
     Inventory createInventory(@Nullable InventoryHolder owner, int size) throws IllegalArgumentException;
 
+    // Paper start
+    /**
+     * Creates an empty inventory of type {@link InventoryType#CHEST} with the
+     * specified size and title.
+     *
+     * @param owner the holder of the inventory, or null to indicate no holder
+     * @param size a multiple of 9 as the size of inventory to create
+     * @param title the title of the inventory, displayed when inventory is
+     *     viewed
+     * @return a new inventory
+     * @throws IllegalArgumentException if the size is not a multiple of 9
+     */
+    @NotNull
+    Inventory createInventory(@Nullable InventoryHolder owner, int size, @NotNull net.kyori.adventure.text.Component title) throws IllegalArgumentException;
+    // Paper end
+
     /**
      * Creates an empty inventory of type {@link InventoryType#CHEST} with the
      * specified size and title.
@@ -1142,10 +1216,13 @@ public interface Server extends PluginMessageRecipient {
      *     viewed
      * @return a new inventory
      * @throws IllegalArgumentException if the size is not a multiple of 9
+     * @deprecated in favour of {@link #createInventory(InventoryHolder, int, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     @NotNull
     Inventory createInventory(@Nullable InventoryHolder owner, int size, @NotNull String title) throws IllegalArgumentException;
 
+    // Paper start
     /**
      * Creates an empty merchant.
      *
@@ -1153,7 +1230,18 @@ public interface Server extends PluginMessageRecipient {
      * when the merchant inventory is viewed
      * @return a new merchant
      */
+    @NotNull Merchant createMerchant(@Nullable net.kyori.adventure.text.Component title);
+    // Paper start
+    /**
+     * Creates an empty merchant.
+     *
+     * @param title the title of the corresponding merchant inventory, displayed
+     * when the merchant inventory is viewed
+     * @return a new merchant
+     * @deprecated in favour of {@link #createMerchant(net.kyori.adventure.text.Component)}
+     */
     @NotNull
+    @Deprecated // Paper
     Merchant createMerchant(@Nullable String title);
 
     /**
@@ -1240,20 +1328,41 @@ public interface Server extends PluginMessageRecipient {
      */
     boolean isPrimaryThread();
 
+    // Paper start
+    /**
+     * Gets the message that is displayed on the server list.
+     *
+     * @return the server's MOTD
+     */
+    @NotNull net.kyori.adventure.text.Component motd();
+    // Paper end
+
     /**
      * Gets the message that is displayed on the server list.
      *
      * @return the servers MOTD
+     * @deprecated in favour of {@link #motd()}
      */
     @NotNull
+    @Deprecated // Paper
     String getMotd();
 
+    // Paper start
+    /**
+     * Gets the default message that is displayed when the server is stopped.
+     *
+     * @return the shutdown message
+     */
+    @Nullable net.kyori.adventure.text.Component shutdownMessage();
+    // Paper end
     /**
      * Gets the default message that is displayed when the server is stopped.
      *
      * @return the shutdown message
+     * @deprecated in favour of {@link #shutdownMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     String getShutdownMessage();
 
     /**
@@ -1610,7 +1719,9 @@ public interface Server extends PluginMessageRecipient {
          * Sends the component to the player
          *
          * @param component the components to send
+         * @deprecated use {@link #broadcast(net.kyori.adventure.text.Component)}
          */
+        @Deprecated // Paper
         public void broadcast(@NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -1619,7 +1730,9 @@ public interface Server extends PluginMessageRecipient {
          * Sends an array of components as a single message to the player
          *
          * @param components the components to send
+         * @deprecated use {@link #broadcast(net.kyori.adventure.text.Component)}
          */
+        @Deprecated // Paper
         public void broadcast(@NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
diff --git a/src/main/java/org/bukkit/Sound.java b/src/main/java/org/bukkit/Sound.java
index 77553fe2e7c1b6a4a9c566e663beffd85bdbd21d..c6d09a8bf2157d4c1c8c40fbb78ddcbbef8b762a 100644
--- a/src/main/java/org/bukkit/Sound.java
+++ b/src/main/java/org/bukkit/Sound.java
@@ -10,7 +10,7 @@ import org.jetbrains.annotations.NotNull;
  * guarantee values will not be removed from this Enum. As such, you should not
  * depend on the ordinal values of this class.
  */
-public enum Sound implements Keyed {
+public enum Sound implements Keyed, net.kyori.adventure.sound.Sound.Type { // Paper - implement Sound.Type
 
     AMBIENT_BASALT_DELTAS_ADDITIONS("ambient.basalt_deltas.additions"),
     AMBIENT_BASALT_DELTAS_LOOP("ambient.basalt_deltas.loop"),
@@ -1227,4 +1227,12 @@ public enum Sound implements Keyed {
     public NamespacedKey getKey() {
         return key;
     }
+
+    // Paper start
+    @NotNull
+    @Override
+    public net.kyori.adventure.key.@org.checkerframework.checker.nullness.qual.NonNull Key key() {
+        return this.key;
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/SoundCategory.java b/src/main/java/org/bukkit/SoundCategory.java
index ac5e263d737973af077e3406a84a84baca4370db..2d91924b7f5ef16a91d40cdc1bfc3d68e0fda38d 100644
--- a/src/main/java/org/bukkit/SoundCategory.java
+++ b/src/main/java/org/bukkit/SoundCategory.java
@@ -3,7 +3,7 @@ package org.bukkit;
 /**
  * An Enum of categories for sounds.
  */
-public enum SoundCategory {
+public enum SoundCategory implements net.kyori.adventure.sound.Sound.Source.Provider { // Paper - implement Sound.Source.Provider
 
     MASTER,
     MUSIC,
@@ -15,4 +15,22 @@ public enum SoundCategory {
     PLAYERS,
     AMBIENT,
     VOICE;
+
+    // Paper start - implement Sound.Source.Provider
+    @Override
+    public net.kyori.adventure.sound.Sound.@org.jetbrains.annotations.NotNull Source soundSource() {
+        return switch (this) {
+            case MASTER -> net.kyori.adventure.sound.Sound.Source.MASTER;
+            case MUSIC -> net.kyori.adventure.sound.Sound.Source.MUSIC;
+            case RECORDS -> net.kyori.adventure.sound.Sound.Source.RECORD;
+            case WEATHER -> net.kyori.adventure.sound.Sound.Source.WEATHER;
+            case BLOCKS -> net.kyori.adventure.sound.Sound.Source.BLOCK;
+            case HOSTILE -> net.kyori.adventure.sound.Sound.Source.HOSTILE;
+            case NEUTRAL -> net.kyori.adventure.sound.Sound.Source.NEUTRAL;
+            case PLAYERS -> net.kyori.adventure.sound.Sound.Source.PLAYER;
+            case AMBIENT -> net.kyori.adventure.sound.Sound.Source.AMBIENT;
+            case VOICE -> net.kyori.adventure.sound.Sound.Source.VOICE;
+        };
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/UnsafeValues.java b/src/main/java/org/bukkit/UnsafeValues.java
index 01e11f882abb6c631f810584aa23646042688435..f43ad19a44f3b7368a1a110cc55247277f4d3751 100644
--- a/src/main/java/org/bukkit/UnsafeValues.java
+++ b/src/main/java/org/bukkit/UnsafeValues.java
@@ -22,6 +22,14 @@ import org.bukkit.plugin.PluginDescriptionFile;
  */
 @Deprecated
 public interface UnsafeValues {
+    // Paper start
+    net.kyori.adventure.text.flattener.ComponentFlattener componentFlattener();
+    @Deprecated net.kyori.adventure.text.serializer.plain.PlainComponentSerializer plainComponentSerializer();
+    net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer plainTextSerializer();
+    net.kyori.adventure.text.serializer.gson.GsonComponentSerializer gsonComponentSerializer();
+    net.kyori.adventure.text.serializer.gson.GsonComponentSerializer colorDownsamplingGsonComponentSerializer();
+    net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer legacyComponentSerializer();
+    // Paper end
 
     Material toLegacy(Material material);
 
diff --git a/src/main/java/org/bukkit/Warning.java b/src/main/java/org/bukkit/Warning.java
index efb97712cc9dc7c1e12a59f5b94e4f2ad7c6b7d8..3024468af4c073324e536c1cb26beffb1e09f3f4 100644
--- a/src/main/java/org/bukkit/Warning.java
+++ b/src/main/java/org/bukkit/Warning.java
@@ -67,6 +67,7 @@ public @interface Warning {
          *     </ul>
          */
         public boolean printFor(@Nullable Warning warning) {
+            if (Boolean.getBoolean("paper.alwaysPrintWarningState")) return true; // Paper
             if (this == DEFAULT) {
                 return warning == null || warning.value();
             }
diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
index 9fa83c728cf686ef0b9913a86873a3d58492c16b..cc491837d149da716f197577f51a25ec31c03344 100644
--- a/src/main/java/org/bukkit/World.java
+++ b/src/main/java/org/bukkit/World.java
@@ -40,7 +40,7 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents a world, which may contain entities, chunks and blocks
  */
-public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient, Metadatable, PersistentDataHolder, Keyed {
+public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient, Metadatable, PersistentDataHolder, Keyed, net.kyori.adventure.audience.ForwardingAudience { // Paper
 
     /**
      * Gets the {@link Block} at the given coordinates
@@ -635,6 +635,14 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
     @NotNull
     public List<Player> getPlayers();
 
+    // Paper start
+    @NotNull
+    @Override
+    default Iterable<? extends net.kyori.adventure.audience.Audience> audiences() {
+        return this.getPlayers();
+    }
+    // Paper end
+
     /**
      * Returns a list of entities within a bounding box centered around a
      * Location.
diff --git a/src/main/java/org/bukkit/block/CommandBlock.java b/src/main/java/org/bukkit/block/CommandBlock.java
index 372c0bd5a4d7800a11c24c95e39fe376a96232bf..73dce588d1f7a5048300073bf8c2b14d6da1e857 100644
--- a/src/main/java/org/bukkit/block/CommandBlock.java
+++ b/src/main/java/org/bukkit/block/CommandBlock.java
@@ -33,7 +33,9 @@ public interface CommandBlock extends TileState {
      * by default is "@".
      *
      * @return Name of this CommandBlock.
+     * @deprecated in favour of {@link #name()}
      */
+    @Deprecated // Paper
     @NotNull
     public String getName();
 
@@ -43,6 +45,28 @@ public interface CommandBlock extends TileState {
      * same as setting it to "@".
      *
      * @param name New name for this CommandBlock.
+     * @deprecated in favour of {@link #name(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setName(@Nullable String name);
+
+    // Paper start
+    /**
+     * Gets the name of this CommandBlock.  The name is used with commands
+     * that this CommandBlock executes.  This name will never be null, and
+     * by default is a {@link net.kyori.adventure.text.TextComponent} containing {@code @}.
+     *
+     * @return Name of this CommandBlock.
+     */
+    public @NotNull net.kyori.adventure.text.Component name();
+
+    /**
+     * Sets the name of this CommandBlock.  The name is used with commands
+     * that this CommandBlock executes.  Setting the name to null is the
+     * same as setting it to a {@link net.kyori.adventure.text.TextComponent} containing {@code @}.
+     *
+     * @param name New name for this CommandBlock.
+     */
+    public void name(@Nullable net.kyori.adventure.text.Component name);
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/block/Sign.java b/src/main/java/org/bukkit/block/Sign.java
index ab6b0ec328e94bf65a0dafd0403e5ee3b870296c..c8d37184d8e882a4084a1bfef85faa330588600b 100644
--- a/src/main/java/org/bukkit/block/Sign.java
+++ b/src/main/java/org/bukkit/block/Sign.java
@@ -7,13 +7,48 @@ import org.jetbrains.annotations.NotNull;
  * Represents a captured state of either a SignPost or a WallSign.
  */
 public interface Sign extends TileState, Colorable {
+    // Paper start
+    /**
+     * Gets all the lines of text currently on this sign.
+     *
+     * @return Array of Strings containing each line of text
+     */
+    @NotNull
+    public java.util.List<net.kyori.adventure.text.Component> lines();
+
+    /**
+     * Gets the line of text at the specified index.
+     * <p>
+     * For example, getLine(0) will return the first line of text.
+     *
+     * @param index Line number to get the text from, starting at 0
+     * @throws IndexOutOfBoundsException Thrown when the line does not exist
+     * @return Text on the given line
+     */
+    @NotNull
+    public net.kyori.adventure.text.Component line(int index) throws IndexOutOfBoundsException;
+
+    /**
+     * Sets the line of text at the specified index.
+     * <p>
+     * For example, setLine(0, "Line One") will set the first line of text to
+     * "Line One".
+     *
+     * @param index Line number to set the text at, starting from 0
+     * @param line New text to set at the specified index
+     * @throws IndexOutOfBoundsException If the index is out of the range 0..3
+     */
+    public void line(int index, @NotNull net.kyori.adventure.text.Component line) throws IndexOutOfBoundsException;
+    // Paper end
 
     /**
      * Gets all the lines of text currently on this sign.
      *
      * @return Array of Strings containing each line of text
+     * @deprecated in favour of {@link #lines()}
      */
     @NotNull
+    @Deprecated // Paper
     public String[] getLines();
 
     /**
@@ -24,8 +59,10 @@ public interface Sign extends TileState, Colorable {
      * @param index Line number to get the text from, starting at 0
      * @return Text on the given line
      * @throws IndexOutOfBoundsException Thrown when the line does not exist
+     * @deprecated in favour of {@link #line(int)}
      */
     @NotNull
+    @Deprecated // Paper
     public String getLine(int index) throws IndexOutOfBoundsException;
 
     /**
@@ -37,7 +74,9 @@ public interface Sign extends TileState, Colorable {
      * @param index Line number to set the text at, starting from 0
      * @param line New text to set at the specified index
      * @throws IndexOutOfBoundsException If the index is out of the range 0..3
+     * @deprecated in favour of {@link #line(int, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setLine(int index, @NotNull String line) throws IndexOutOfBoundsException;
 
     /**
diff --git a/src/main/java/org/bukkit/command/Command.java b/src/main/java/org/bukkit/command/Command.java
index 4bfc214685164a38ba4261b2bae7faa8a3bd297e..50e6d45ec9349b56d20e2ffc664eca15ba936cc6 100644
--- a/src/main/java/org/bukkit/command/Command.java
+++ b/src/main/java/org/bukkit/command/Command.java
@@ -32,8 +32,7 @@ public abstract class Command {
     protected String description;
     protected String usageMessage;
     private String permission;
-    private String permissionMessage;
-    public org.spigotmc.CustomTimingsHandler timings; // Spigot
+    private net.kyori.adventure.text.Component permissionMessage; // Paper
 
     protected Command(@NotNull String name) {
         this(name, "", "/" + name, new ArrayList<String>());
@@ -186,10 +185,10 @@ public abstract class Command {
 
         if (permissionMessage == null) {
             target.sendMessage(ChatColor.RED + "I'm sorry, but you do not have permission to perform this command. Please contact the server administrators if you believe that this is a mistake.");
-        } else if (permissionMessage.length() != 0) {
-            for (String line : permissionMessage.replace("<permission>", permission).split("\n")) {
-                target.sendMessage(line);
-            }
+            // Paper start - use components for permissionMessage
+        } else if (!permissionMessage.equals(net.kyori.adventure.text.Component.empty())) {
+            target.sendMessage(permissionMessage.replaceText(net.kyori.adventure.text.TextReplacementConfig.builder().matchLiteral("<permission>").replacement(permission).build()));
+            // Paper end
         }
 
         return false;
@@ -317,10 +316,12 @@ public abstract class Command {
      * command
      *
      * @return Permission check failed message
+     * @deprecated use {@link #permissionMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getPermissionMessage() {
-        return permissionMessage;
+        return io.papermc.paper.text.PaperComponents.legacySectionSerializer().serializeOrNull(permissionMessage); // Paper
     }
 
     /**
@@ -381,10 +382,12 @@ public abstract class Command {
      * @param permissionMessage new permission message, null to indicate
      *     default message, or an empty string to indicate no message
      * @return this command object, for chaining
+     * @deprecated use {@link #permissionMessage(net.kyori.adventure.text.Component)}
      */
     @NotNull
+    @Deprecated // Paper
     public Command setPermissionMessage(@Nullable String permissionMessage) {
-        this.permissionMessage = permissionMessage;
+        this.permissionMessage = io.papermc.paper.text.PaperComponents.legacySectionSerializer().deserializeOrNull(permissionMessage); // Paper
         return this;
     }
 
@@ -399,6 +402,25 @@ public abstract class Command {
         this.usageMessage = (usage == null) ? "" : usage;
         return this;
     }
+    // Paper start
+    /**
+     * Gets the permission message.
+     *
+     * @return the permission message
+     */
+    public @Nullable net.kyori.adventure.text.Component permissionMessage() {
+        return this.permissionMessage;
+    }
+
+    /**
+     * Sets the permission message.
+     *
+     * @param permissionMessage the permission message
+     */
+    public void permissionMessage(@Nullable net.kyori.adventure.text.Component permissionMessage) {
+        this.permissionMessage = permissionMessage;
+    }
+    // Paper end
 
     public static void broadcastCommandMessage(@NotNull CommandSender source, @NotNull String message) {
         broadcastCommandMessage(source, message, true);
diff --git a/src/main/java/org/bukkit/command/CommandSender.java b/src/main/java/org/bukkit/command/CommandSender.java
index 284be63a125624a8ae43d2c164aede810ce6bfe5..f98d46fa45bb7c842d791b09f082a0968ae537fb 100644
--- a/src/main/java/org/bukkit/command/CommandSender.java
+++ b/src/main/java/org/bukkit/command/CommandSender.java
@@ -6,12 +6,13 @@ import org.bukkit.permissions.Permissible;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-public interface CommandSender extends Permissible {
+public interface CommandSender extends net.kyori.adventure.audience.Audience, Permissible { // Paper
 
     /**
      * Sends this sender a message
      *
      * @param message Message to be displayed
+     * @see #sendMessage(net.kyori.adventure.text.Component)
      */
     public void sendMessage(@NotNull String message);
 
@@ -19,6 +20,7 @@ public interface CommandSender extends Permissible {
      * Sends this sender multiple messages
      *
      * @param messages An array of messages to be displayed
+     * @see #sendMessage(net.kyori.adventure.text.Component)
      */
     public void sendMessage(@NotNull String... messages);
 
@@ -27,6 +29,7 @@ public interface CommandSender extends Permissible {
      *
      * @param message Message to be displayed
      * @param sender The sender of this message
+     * @see #sendMessage(net.kyori.adventure.identity.Identified, net.kyori.adventure.text.Component)
      */
     public void sendMessage(@Nullable UUID sender, @NotNull String message);
 
@@ -35,6 +38,7 @@ public interface CommandSender extends Permissible {
      *
      * @param messages An array of messages to be displayed
      * @param sender The sender of this message
+     * @see #sendMessage(net.kyori.adventure.identity.Identified, net.kyori.adventure.text.Component)
      */
     public void sendMessage(@Nullable UUID sender, @NotNull String... messages);
 
@@ -61,7 +65,9 @@ public interface CommandSender extends Permissible {
          * Sends this sender a chat component.
          *
          * @param component the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -70,7 +76,9 @@ public interface CommandSender extends Permissible {
          * Sends an array of components as a single message to the sender.
          *
          * @param components the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -80,7 +88,9 @@ public interface CommandSender extends Permissible {
          *
          * @param component the components to send
          * @param sender the sender of the message
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@Nullable UUID sender, @NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -90,7 +100,9 @@ public interface CommandSender extends Permissible {
          *
          * @param components the components to send
          * @param sender the sender of the message
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@Nullable UUID sender, @NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -99,4 +111,18 @@ public interface CommandSender extends Permissible {
     @NotNull
     Spigot spigot();
     // Spigot end
+
+    // Paper start
+    /**
+     * Gets the name of this command sender
+     *
+     * @return Name of the sender
+     */
+    public @NotNull net.kyori.adventure.text.Component name();
+
+    @Override
+    default void sendMessage(final @NotNull net.kyori.adventure.identity.Identity identity, final @NotNull net.kyori.adventure.text.Component message, final @NotNull net.kyori.adventure.audience.MessageType type) {
+        this.sendMessage(org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(message));
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/command/PluginCommandYamlParser.java b/src/main/java/org/bukkit/command/PluginCommandYamlParser.java
index a542c4bb3c973bbe4b976642feccde6a4d90cb7b..614cba22c0997dbb45576f800675db4053a9831c 100644
--- a/src/main/java/org/bukkit/command/PluginCommandYamlParser.java
+++ b/src/main/java/org/bukkit/command/PluginCommandYamlParser.java
@@ -67,7 +67,7 @@ public class PluginCommandYamlParser {
             }
 
             if (permissionMessage != null) {
-                newCmd.setPermissionMessage(permissionMessage.toString());
+                newCmd.permissionMessage(io.papermc.paper.text.PaperComponents.legacySectionSerializer().deserialize(permissionMessage.toString())); // Paper
             }
 
             pluginCmds.add(newCmd);
diff --git a/src/main/java/org/bukkit/command/ProxiedCommandSender.java b/src/main/java/org/bukkit/command/ProxiedCommandSender.java
index fcc34b640265f4dccb46b9f09466ab8e1d96043e..74599b4ee0518481c0e3a5f6ab2f5302837f1ae3 100644
--- a/src/main/java/org/bukkit/command/ProxiedCommandSender.java
+++ b/src/main/java/org/bukkit/command/ProxiedCommandSender.java
@@ -3,7 +3,7 @@ package org.bukkit.command;
 
 import org.jetbrains.annotations.NotNull;
 
-public interface ProxiedCommandSender extends CommandSender {
+public interface ProxiedCommandSender extends CommandSender, net.kyori.adventure.audience.ForwardingAudience.Single { // Paper
 
     /**
      * Returns the CommandSender which triggered this proxied command
@@ -21,4 +21,16 @@ public interface ProxiedCommandSender extends CommandSender {
     @NotNull
     CommandSender getCallee();
 
+    // Paper start
+    @Override
+    default void sendMessage(final @NotNull net.kyori.adventure.identity.Identity source, final @NotNull net.kyori.adventure.text.Component message, final @NotNull net.kyori.adventure.audience.MessageType type) {
+        net.kyori.adventure.audience.ForwardingAudience.Single.super.sendMessage(source, message, type);
+    }
+
+    @NotNull
+    @Override
+    default net.kyori.adventure.audience.Audience audience() {
+        return this.getCaller();
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/enchantments/Enchantment.java b/src/main/java/org/bukkit/enchantments/Enchantment.java
index b833ef63fbe01271ceb2bd83a9eb4a84c9912761..8eb0497c81744874809ebc4bc2e28b128e66a926 100644
--- a/src/main/java/org/bukkit/enchantments/Enchantment.java
+++ b/src/main/java/org/bukkit/enchantments/Enchantment.java
@@ -294,6 +294,19 @@ public abstract class Enchantment implements Keyed {
      * @return True if the enchantment may be applied, otherwise False
      */
     public abstract boolean canEnchantItem(@NotNull ItemStack item);
+    // Paper start
+    /**
+     * Get the name of the enchantment with its applied level.
+     * <p>
+     * If the given {@code level} is either less than the {@link #getStartLevel()} or greater than the {@link #getMaxLevel()},
+     * the level may not be shown in the numeral format one may otherwise expect.
+     * </p>
+     *
+     * @param level the level of the enchantment to show
+     * @return the name of the enchantment with {@code level} applied
+     */
+    public abstract @NotNull net.kyori.adventure.text.Component displayName(int level);
+    // Paper end
 
     @Override
     public boolean equals(Object obj) {
diff --git a/src/main/java/org/bukkit/enchantments/EnchantmentWrapper.java b/src/main/java/org/bukkit/enchantments/EnchantmentWrapper.java
index 9566e4306ada5e82dede0f002aa06da12c44996b..4d5f0837bd0e02a30c943d8969fb6b13452322e0 100644
--- a/src/main/java/org/bukkit/enchantments/EnchantmentWrapper.java
+++ b/src/main/java/org/bukkit/enchantments/EnchantmentWrapper.java
@@ -63,4 +63,11 @@ public class EnchantmentWrapper extends Enchantment {
     public boolean conflictsWith(@NotNull Enchantment other) {
         return getEnchantment().conflictsWith(other);
     }
+    // Paper start
+    @NotNull
+    @Override
+    public net.kyori.adventure.text.Component displayName(int level) {
+        return getEnchantment().displayName(level);
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/entity/Entity.java b/src/main/java/org/bukkit/entity/Entity.java
index 922d33ff4fa9d901d3c5c0a9f8399ad8aef62c37..cd287978c34873c7122794e4f3e762915978a1f0 100644
--- a/src/main/java/org/bukkit/entity/Entity.java
+++ b/src/main/java/org/bukkit/entity/Entity.java
@@ -25,7 +25,7 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents a base entity in the world
  */
-public interface Entity extends Metadatable, CommandSender, Nameable, PersistentDataHolder {
+public interface Entity extends Metadatable, CommandSender, Nameable, PersistentDataHolder, net.kyori.adventure.text.event.HoverEventSource<net.kyori.adventure.text.event.HoverEvent.ShowEntity>, net.kyori.adventure.sound.Sound.Emitter { // Paper
 
     /**
      * Gets the entity's current position
@@ -656,4 +656,20 @@ public interface Entity extends Metadatable, CommandSender, Nameable, Persistent
     @Override
     Spigot spigot();
     // Spigot end
+
+    // Paper start
+    /**
+     * Gets the entity's display name formatted with their team prefix/suffix and
+     * the entity's default hover/click events.
+     *
+     * @return the team display name
+     */
+    @NotNull net.kyori.adventure.text.Component teamDisplayName();
+
+    @NotNull
+    @Override
+    default net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowEntity> asHoverEvent(final @NotNull java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowEntity> op) {
+        return net.kyori.adventure.text.event.HoverEvent.showEntity(op.apply(net.kyori.adventure.text.event.HoverEvent.ShowEntity.of(this.getType().getKey(), this.getUniqueId(), this.customName())));
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
index e0f9ba3da29261823d48042b74a33acb9f48d597..dc7e32a6f3be974a1d9c367d6b0f840ce98aed8b 100644
--- a/src/main/java/org/bukkit/entity/Player.java
+++ b/src/main/java/org/bukkit/entity/Player.java
@@ -37,7 +37,28 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents a player, connected or not
  */
-public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginMessageRecipient {
+public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginMessageRecipient, net.kyori.adventure.identity.Identified { // Paper
+
+    // Paper start
+    @Override
+    default @NotNull net.kyori.adventure.identity.Identity identity() {
+        return net.kyori.adventure.identity.Identity.identity(this.getUniqueId());
+    }
+
+    /**
+     * Gets the "friendly" name to display of this player.
+     *
+     * @return the display name
+     */
+    @NotNull net.kyori.adventure.text.Component displayName();
+
+    /**
+     * Sets the "friendly" name to display of this player.
+     *
+     * @param displayName the display name to set
+     */
+    void displayName(final @Nullable net.kyori.adventure.text.Component displayName);
+    // Paper end
 
     /**
      * Gets the "friendly" name to display of this player. This may include
@@ -47,7 +68,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * places defined by plugins.
      *
      * @return the friendly name
+     * @deprecated in favour of {@link #displayName()}
      */
+    @Deprecated // Paper
     @NotNull
     public String getDisplayName();
 
@@ -59,15 +82,50 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * places defined by plugins.
      *
      * @param name The new display name.
+     * @deprecated in favour of {@link #displayName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setDisplayName(@Nullable String name);
 
+    // Paper start
+    /**
+     * Sets the name that is shown on the in-game player list.
+     * <p>
+     * If the value is null, the name will be identical to {@link #getName()}.
+     *
+     * @param name new player list name
+     */
+    void playerListName(@Nullable net.kyori.adventure.text.Component name);
+
+    /**
+     * Gets the name that is shown on the in-game player list.
+     *
+     * @return the player list name
+     */
+    @NotNull net.kyori.adventure.text.Component playerListName();
+
+    /**
+     * Gets the currently displayed player list header for this player.
+     *
+     * @return player list header or null
+     */
+    @Nullable net.kyori.adventure.text.Component playerListHeader();
+
+    /**
+     * Gets the currently displayed player list footer for this player.
+     *
+     * @return player list footer or null
+     */
+    @Nullable net.kyori.adventure.text.Component playerListFooter();
+    // Paper end
     /**
      * Gets the name that is shown on the player list.
      *
      * @return the player list name
+     * @deprecated in favour of {@link #playerListName()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getPlayerListName();
 
     /**
@@ -76,14 +134,18 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * If the value is null, the name will be identical to {@link #getName()}.
      *
      * @param name new player list name
+     * @deprecated in favour of {@link #playerListName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setPlayerListName(@Nullable String name);
 
     /**
      * Gets the currently displayed player list header for this player.
      *
      * @return player list header or null
+     * @deprecated in favour of {@link #playerListHeader()}
      */
+    @Deprecated // Paper
     @Nullable
     public String getPlayerListHeader();
 
@@ -91,7 +153,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * Gets the currently displayed player list footer for this player.
      *
      * @return player list header or null
+     * @deprecated in favour of {@link #playerListFooter()}
      */
+    @Deprecated // Paper
     @Nullable
     public String getPlayerListFooter();
 
@@ -99,14 +163,18 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * Sets the currently displayed player list header for this player.
      *
      * @param header player list header, null for empty
+     * @deprecated in favour of {@link #sendPlayerListHeader(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setPlayerListHeader(@Nullable String header);
 
     /**
      * Sets the currently displayed player list footer for this player.
      *
      * @param footer player list footer, null for empty
+     * @deprecated in favour of {@link #sendPlayerListFooter(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setPlayerListFooter(@Nullable String footer);
 
     /**
@@ -115,7 +183,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *
      * @param header player list header, null for empty
      * @param footer player list footer, null for empty
+     * @deprecated in favour of {@link #sendPlayerListHeaderAndFooter(net.kyori.adventure.text.Component, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setPlayerListHeaderFooter(@Nullable String header, @Nullable String footer);
 
     /**
@@ -153,9 +223,20 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * Kicks player with custom kick message.
      *
      * @param message kick message
+     * @deprecated in favour of {@link #kick(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void kickPlayer(@Nullable String message);
 
+    // Paper start
+    /**
+     * Kicks player with custom kick message.
+     *
+     * @param message kick message
+     */
+    void kick(final @Nullable net.kyori.adventure.text.Component message);
+    // Paper end
+
     /**
      * Says a message (or runs a command).
      *
@@ -500,6 +581,90 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      */
     public void sendEquipmentChange(@NotNull LivingEntity entity, @NotNull EquipmentSlot slot, @NotNull ItemStack item);
 
+    // Paper start
+    /**
+     * Send a sign change. This fakes a sign change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * This method will use a sign at the location's block or a faked sign
+     * sent via
+     * {@link #sendBlockChange(org.bukkit.Location, org.bukkit.Material, byte)}.
+     * <p>
+     * If the client does not have a sign at the given location it will
+     * display an error message to the user.
+     *
+     * @param loc the location of the sign
+     * @param lines the new text on the sign or null to clear it
+     * @throws IllegalArgumentException if location is null
+     * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     */
+    default void sendSignChange(@NotNull Location loc, @Nullable java.util.List<net.kyori.adventure.text.Component> lines) throws IllegalArgumentException {
+        this.sendSignChange(loc, lines, DyeColor.BLACK);
+    }
+
+    /**
+     * Send a sign change. This fakes a sign change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * This method will use a sign at the location's block or a faked sign
+     * sent via
+     * {@link #sendBlockChange(org.bukkit.Location, org.bukkit.Material, byte)}.
+     * <p>
+     * If the client does not have a sign at the given location it will
+     * display an error message to the user.
+     *
+     * @param loc the location of the sign
+     * @param lines the new text on the sign or null to clear it
+     * @param dyeColor the color of the sign
+     * @throws IllegalArgumentException if location is null
+     * @throws IllegalArgumentException if dyeColor is null
+     * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     */
+    default void sendSignChange(@NotNull Location loc, @Nullable java.util.List<net.kyori.adventure.text.Component> lines, @NotNull DyeColor dyeColor) throws IllegalArgumentException {
+        this.sendSignChange(loc, lines, dyeColor, false);
+    }
+
+    /**
+     * Send a sign change. This fakes a sign change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * This method will use a sign at the location's block or a faked sign
+     * sent via
+     * {@link #sendBlockChange(org.bukkit.Location, org.bukkit.Material, byte)}.
+     * <p>
+     * If the client does not have a sign at the given location it will
+     * display an error message to the user.
+     *
+     * @param loc the location of the sign
+     * @param lines the new text on the sign or null to clear it
+     * @param hasGlowingText whether the text of the sign should glow as if dyed with a glowing ink sac
+     * @throws IllegalArgumentException if location is null
+     * @throws IllegalArgumentException if dyeColor is null
+     * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     */
+    default void sendSignChange(@NotNull Location loc, @Nullable java.util.List<net.kyori.adventure.text.Component> lines, boolean hasGlowingText) throws IllegalArgumentException {
+        this.sendSignChange(loc, lines, DyeColor.BLACK, hasGlowingText);
+    }
+
+    /**
+     * Send a sign change. This fakes a sign change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * This method will use a sign at the location's block or a faked sign
+     * sent via
+     * {@link #sendBlockChange(org.bukkit.Location, org.bukkit.Material, byte)}.
+     * <p>
+     * If the client does not have a sign at the given location it will
+     * display an error message to the user.
+     *
+     * @param loc the location of the sign
+     * @param lines the new text on the sign or null to clear it
+     * @param dyeColor the color of the sign
+     * @param hasGlowingText whether the text of the sign should glow as if dyed with a glowing ink sac
+     * @throws IllegalArgumentException if location is null
+     * @throws IllegalArgumentException if dyeColor is null
+     * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     */
+    void sendSignChange(@NotNull Location loc, @Nullable java.util.List<net.kyori.adventure.text.Component> lines, @NotNull DyeColor dyeColor, boolean hasGlowingText)
+        throws IllegalArgumentException;
+    // Paper end
+
     /**
      * Send a sign change. This fakes a sign change packet for a user at
      * a certain location. This will not actually change the world in any way.
@@ -514,7 +679,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @param lines the new text on the sign or null to clear it
      * @throws IllegalArgumentException if location is null
      * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated in favour of {@link #sendSignChange(org.bukkit.Location, java.util.List)}
      */
+    @Deprecated // Paper
     public void sendSignChange(@NotNull Location loc, @Nullable String[] lines) throws IllegalArgumentException;
 
     /**
@@ -533,7 +700,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException if location is null
      * @throws IllegalArgumentException if dyeColor is null
      * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated in favour of {@link #sendSignChange(org.bukkit.Location, java.util.List, org.bukkit.DyeColor)}
      */
+    @Deprecated // Paper
     public void sendSignChange(@NotNull Location loc, @Nullable String[] lines, @NotNull DyeColor dyeColor) throws IllegalArgumentException;
 
     /**
@@ -553,7 +722,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException if location is null
      * @throws IllegalArgumentException if dyeColor is null
      * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated Deprecated in favour of {@link #sendSignChange(Location, java.util.List, DyeColor, boolean)}
      */
+    @Deprecated // Paper
     public void sendSignChange(@NotNull Location loc, @Nullable String[] lines, @NotNull DyeColor dyeColor, boolean hasGlowingText) throws IllegalArgumentException;
 
     /**
@@ -1028,6 +1199,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *     pack correctly.
      * </ul>
      *
+     * @deprecated in favour of {@link #setResourcePack(String, byte[], Component)}
      * @param url The URL from which the client will download the resource
      *     pack. The string must contain only US-ASCII characters and should
      *     be encoded as per RFC 1738.
@@ -1041,8 +1213,57 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
      *     long.
      */
+    @Deprecated // Paper
     public void setResourcePack(@NotNull String url, @Nullable byte[] hash, @Nullable String prompt);
 
+    // Paper start
+    /**
+     * Request that the player's client download and switch resource packs.
+     * <p>
+     * The player's client will download the new resource pack asynchronously
+     * in the background, and will automatically switch to it once the
+     * download is complete. If the client has downloaded and cached a
+     * resource pack with the same hash in the past it will not download but
+     * directly apply the cached pack. If the hash is null and the client has
+     * downloaded and cached the same resource pack in the past, it will
+     * perform a file size check against the response content to determine if
+     * the resource pack has changed and needs to be downloaded again. When
+     * this request is sent for the very first time from a given server, the
+     * client will first display a confirmation GUI to the player before
+     * proceeding with the download.
+     * <p>
+     * Notes:
+     * <ul>
+     * <li>Players can disable server resources on their client, in which
+     *     case this method will have no affect on them. Use the
+     *     {@link PlayerResourcePackStatusEvent} to figure out whether or not
+     *     the player loaded the pack!
+     * <li>There is no concept of resetting resource packs back to default
+     *     within Minecraft, so players will have to relog to do so or you
+     *     have to send an empty pack.
+     * <li>The request is sent with empty string as the hash when the hash is
+     *     not provided. This might result in newer versions not loading the
+     *     pack correctly.
+     * </ul>
+     *
+     * @param url The URL from which the client will download the resource
+     *     pack. The string must contain only US-ASCII characters and should
+     *     be encoded as per RFC 1738.
+     * @param hash The sha1 hash sum of the resource pack file which is used
+     *     to apply a cached version of the pack directly without downloading
+     *     if it is available. Hast to be 20 bytes long!
+     * @param prompt The optional custom prompt message to be shown to client.
+     * @throws IllegalArgumentException Thrown if the URL is null.
+     * @throws IllegalArgumentException Thrown if the URL is too long. The
+     *     length restriction is an implementation specific arbitrary value.
+     * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
+     *     long.
+     */
+    default void setResourcePack(@NotNull String url, byte @Nullable [] hash, net.kyori.adventure.text.@Nullable Component prompt) {
+        this.setResourcePack(url, hash, prompt, false);
+    }
+    // Paper end
+
     /**
      * Request that the player's client download and switch resource packs.
      * <p>
@@ -1117,6 +1338,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *     pack correctly.
      * </ul>
      *
+     * @deprecated in favour of {@link #setResourcePack(String, byte[], Component, boolean)}
      * @param url The URL from which the client will download the resource
      *     pack. The string must contain only US-ASCII characters and should
      *     be encoded as per RFC 1738.
@@ -1132,8 +1354,57 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
      *     long.
      */
+    @Deprecated // Paper
     public void setResourcePack(@NotNull String url, @Nullable byte[] hash, @Nullable String prompt, boolean force);
 
+    // Paper start
+    /**
+     * Request that the player's client download and switch resource packs.
+     * <p>
+     * The player's client will download the new resource pack asynchronously
+     * in the background, and will automatically switch to it once the
+     * download is complete. If the client has downloaded and cached a
+     * resource pack with the same hash in the past it will not download but
+     * directly apply the cached pack. If the hash is null and the client has
+     * downloaded and cached the same resource pack in the past, it will
+     * perform a file size check against the response content to determine if
+     * the resource pack has changed and needs to be downloaded again. When
+     * this request is sent for the very first time from a given server, the
+     * client will first display a confirmation GUI to the player before
+     * proceeding with the download.
+     * <p>
+     * Notes:
+     * <ul>
+     * <li>Players can disable server resources on their client, in which
+     *     case this method will have no affect on them. Use the
+     *     {@link PlayerResourcePackStatusEvent} to figure out whether or not
+     *     the player loaded the pack!
+     * <li>There is no concept of resetting resource packs back to default
+     *     within Minecraft, so players will have to relog to do so or you
+     *     have to send an empty pack.
+     * <li>The request is sent with empty string as the hash when the hash is
+     *     not provided. This might result in newer versions not loading the
+     *     pack correctly.
+     * </ul>
+     *
+     * @param url The URL from which the client will download the resource
+     *     pack. The string must contain only US-ASCII characters and should
+     *     be encoded as per RFC 1738.
+     * @param hash The sha1 hash sum of the resource pack file which is used
+     *     to apply a cached version of the pack directly without downloading
+     *     if it is available. Hast to be 20 bytes long!
+     * @param prompt The optional custom prompt message to be shown to client.
+     * @param force If true, the client will be disconnected from the server
+     *     when it declines to use the resource pack.
+     * @throws IllegalArgumentException Thrown if the URL is null.
+     * @throws IllegalArgumentException Thrown if the URL is too long. The
+     *     length restriction is an implementation specific arbitrary value.
+     * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
+     *     long.
+     */
+    public void setResourcePack(@NotNull String url, byte @Nullable [] hash, net.kyori.adventure.text.@Nullable Component prompt, boolean force);
+    // Paper end
+
     /**
      * Gets the Scoreboard displayed to this player
      *
@@ -1249,7 +1520,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *
      * @param title Title text
      * @param subtitle Subtitle text
-     * @deprecated API behavior subject to change
+     * @deprecated Use {@link #showTitle(net.kyori.adventure.title.Title)} or {@link #sendTitlePart(net.kyori.adventure.title.TitlePart, Object)}
      */
     @Deprecated
     public void sendTitle(@Nullable String title, @Nullable String subtitle);
@@ -1268,7 +1539,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @param fadeIn time in ticks for titles to fade in. Defaults to 10.
      * @param stay time in ticks for titles to stay. Defaults to 70.
      * @param fadeOut time in ticks for titles to fade out. Defaults to 20.
+     * @deprecated Use {@link #showTitle(net.kyori.adventure.title.Title)} or {@link #sendTitlePart(net.kyori.adventure.title.TitlePart, Object)}
      */
+    @Deprecated // Paper - Adventure
     public void sendTitle(@Nullable String title, @Nullable String subtitle, int fadeIn, int stay, int fadeOut);
 
     /**
@@ -1495,6 +1768,14 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      */
     public int getClientViewDistance();
 
+    // Paper start
+    /**
+     * Gets the player's current locale.
+     *
+     * @return the player's locale
+     */
+    @NotNull java.util.Locale locale();
+    // Paper end
     /**
      * Gets the player's estimated ping in milliseconds.
      *
@@ -1520,8 +1801,10 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * they wish.
      *
      * @return the player's locale
+     * @deprecated in favour of {@link #locale()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getLocale();
 
     /**
@@ -1563,6 +1846,14 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      */
     public boolean isAllowingServerListings();
 
+    // Paper start
+    @NotNull
+    @Override
+    default net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowEntity> asHoverEvent(final @NotNull java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowEntity> op) {
+        return net.kyori.adventure.text.event.HoverEvent.showEntity(op.apply(net.kyori.adventure.text.event.HoverEvent.ShowEntity.of(this.getType().getKey(), this.getUniqueId(), this.displayName())));
+    }
+    // Paper end
+
     // Spigot start
     public class Spigot extends Entity.Spigot {
 
@@ -1617,11 +1908,13 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
             throw new UnsupportedOperationException("Not supported yet.");
         }
 
+        @Deprecated // Paper
         @Override
         public void sendMessage(@NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
 
+        @Deprecated // Paper
         @Override
         public void sendMessage(@NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
@@ -1632,7 +1925,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
          *
          * @param position the screen position
          * @param component the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.ChatMessageType position, @NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -1642,7 +1937,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
          *
          * @param position the screen position
          * @param components the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.ChatMessageType position, @NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -1653,7 +1950,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
          * @param position the screen position
          * @param sender the sender of the message
          * @param component the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.ChatMessageType position, @Nullable UUID sender, @NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -1664,7 +1963,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
          * @param position the screen position
          * @param sender the sender of the message
          * @param components the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.ChatMessageType position, @Nullable UUID sender, @NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
diff --git a/src/main/java/org/bukkit/entity/minecart/CommandMinecart.java b/src/main/java/org/bukkit/entity/minecart/CommandMinecart.java
index 63c80b4ee1f7adc8a9efc3b607993104b1991f90..91cab8b13d5bba34007f124838b32a1df58c5ac7 100644
--- a/src/main/java/org/bukkit/entity/minecart/CommandMinecart.java
+++ b/src/main/java/org/bukkit/entity/minecart/CommandMinecart.java
@@ -32,7 +32,9 @@ public interface CommandMinecart extends Minecart {
      * same as setting it to "@".
      *
      * @param name New name for this CommandMinecart.
+     * @deprecated in favour of {@link #customName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setName(@Nullable String name);
 
 }
diff --git a/src/main/java/org/bukkit/event/block/SignChangeEvent.java b/src/main/java/org/bukkit/event/block/SignChangeEvent.java
index 7190db11eff7d48df8a99f405a9dbaefdfa76e3d..1f79f704abf339150df08900b8ea7da4cefef258 100644
--- a/src/main/java/org/bukkit/event/block/SignChangeEvent.java
+++ b/src/main/java/org/bukkit/event/block/SignChangeEvent.java
@@ -16,12 +16,25 @@ public class SignChangeEvent extends BlockEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
     private boolean cancel = false;
     private final Player player;
-    private final String[] lines;
+    // Paper start
+    private final java.util.List<net.kyori.adventure.text.Component> adventure$lines;
 
+    public SignChangeEvent(@NotNull final Block theBlock, @NotNull final Player player, @NotNull final java.util.List<net.kyori.adventure.text.Component> adventure$lines) {
+        super(theBlock);
+        this.player = player;
+        this.adventure$lines = adventure$lines;
+    }
+
+    @Deprecated // Paper end
     public SignChangeEvent(@NotNull final Block theBlock, @NotNull final Player thePlayer, @NotNull final String[] theLines) {
         super(theBlock);
         this.player = thePlayer;
-        this.lines = theLines;
+        // Paper start
+        this.adventure$lines = new java.util.ArrayList<>();
+        for (String theLine : theLines) {
+            this.adventure$lines.add(org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(theLine));
+        }
+        // Paper end
     }
 
     /**
@@ -34,14 +47,52 @@ public class SignChangeEvent extends BlockEvent implements Cancellable {
         return player;
     }
 
+    // Paper start
+    /**
+     * Gets all of the lines of text from the sign involved in this event.
+     *
+     * @return the String array for the sign's lines new text
+     */
+    public @NotNull java.util.List<net.kyori.adventure.text.Component> lines() {
+        return this.adventure$lines;
+    }
+
+    /**
+     * Gets a single line of text from the sign involved in this event.
+     *
+     * @param index index of the line to get
+     * @return the String containing the line of text associated with the
+     *     provided index
+     * @throws IndexOutOfBoundsException thrown when the provided index is {@literal > 3
+     *     or < 0}
+     */
+    public @Nullable net.kyori.adventure.text.Component line(int index) throws IndexOutOfBoundsException {
+        return this.adventure$lines.get(index);
+    }
+
+    /**
+     * Sets a single line for the sign involved in this event
+     *
+     * @param index index of the line to set
+     * @param line text to set
+     * @throws IndexOutOfBoundsException thrown when the provided index is {@literal > 3
+     *     or < 0}
+     */
+    public void line(int index, @Nullable net.kyori.adventure.text.Component line) throws IndexOutOfBoundsException {
+        this.adventure$lines.set(index, line);
+    }
+    // Paper end
+
     /**
      * Gets all of the lines of text from the sign involved in this event.
      *
      * @return the String array for the sign's lines new text
+     * @deprecated in favour of {@link #lines()}
      */
     @NotNull
+    @Deprecated // Paper
     public String[] getLines() {
-        return lines;
+        return adventure$lines.stream().map(org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer()::serialize).toArray(String[]::new); // Paper
     }
 
     /**
@@ -52,10 +103,12 @@ public class SignChangeEvent extends BlockEvent implements Cancellable {
      *     provided index
      * @throws IndexOutOfBoundsException thrown when the provided index is {@literal > 3
      *     or < 0}
+     * @deprecated in favour of {@link #line(int)}
      */
     @Nullable
+    @Deprecated // Paper
     public String getLine(int index) throws IndexOutOfBoundsException {
-        return lines[index];
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.adventure$lines.get(index)); // Paper
     }
 
     /**
@@ -65,9 +118,11 @@ public class SignChangeEvent extends BlockEvent implements Cancellable {
      * @param line text to set
      * @throws IndexOutOfBoundsException thrown when the provided index is {@literal > 3
      *     or < 0}
+     * @deprecated in favour of {@link #line(int, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setLine(int index, @Nullable String line) throws IndexOutOfBoundsException {
-        lines[index] = line;
+        adventure$lines.set(index, line != null ? org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(line) : null); // Paper
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/event/entity/PlayerDeathEvent.java b/src/main/java/org/bukkit/event/entity/PlayerDeathEvent.java
index 3c2ea8fec3a748cab7f5ad9100d12bd8213ec6c9..a01d4c21bedc7f1a54f5a330bb4c2909ce3a18e4 100644
--- a/src/main/java/org/bukkit/event/entity/PlayerDeathEvent.java
+++ b/src/main/java/org/bukkit/event/entity/PlayerDeathEvent.java
@@ -12,25 +12,48 @@ import org.jetbrains.annotations.Nullable;
 public class PlayerDeathEvent extends EntityDeathEvent {
     private int newExp = 0;
     private String deathMessage = "";
+    private net.kyori.adventure.text.Component adventure$deathMessage; // Paper
     private int newLevel = 0;
     private int newTotalExp = 0;
     private boolean keepLevel = false;
     private boolean keepInventory = false;
+    // Paper start
+    public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, @Nullable final net.kyori.adventure.text.Component adventure$deathMessage) {
+        this(player, drops, droppedExp, 0, adventure$deathMessage, null);
+    }
+
+    public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, final int newExp, @Nullable final net.kyori.adventure.text.Component adventure$deathMessage, @Nullable String deathMessage) {
+        this(player, drops, droppedExp, newExp, 0, 0, adventure$deathMessage, deathMessage);
+    }
 
+    public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, final int newExp, final int newTotalExp, final int newLevel, @Nullable final net.kyori.adventure.text.Component adventure$deathMessage, @Nullable String deathMessage) {
+        super(player, drops, droppedExp);
+        this.newExp = newExp;
+        this.newTotalExp = newTotalExp;
+        this.newLevel = newLevel;
+        this.deathMessage = deathMessage;
+        this.adventure$deathMessage = adventure$deathMessage;
+    }
+    // Paper end
+
+    @Deprecated // Paper
     public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, @Nullable final String deathMessage) {
         this(player, drops, droppedExp, 0, deathMessage);
     }
 
+    @Deprecated // Paper
     public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, final int newExp, @Nullable final String deathMessage) {
         this(player, drops, droppedExp, newExp, 0, 0, deathMessage);
     }
 
+    @Deprecated // Paper
     public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, final int newExp, final int newTotalExp, final int newLevel, @Nullable final String deathMessage) {
         super(player, drops, droppedExp);
         this.newExp = newExp;
         this.newTotalExp = newTotalExp;
         this.newLevel = newLevel;
         this.deathMessage = deathMessage;
+        this.adventure$deathMessage = deathMessage != null ? org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(deathMessage) : net.kyori.adventure.text.Component.empty(); // Paper
     }
 
     @NotNull
@@ -39,25 +62,55 @@ public class PlayerDeathEvent extends EntityDeathEvent {
         return (Player) entity;
     }
 
+    // Paper start
+    /**
+     * Set the death message that will appear to everyone on the server.
+     *
+     * @param deathMessage Message to appear to other players on the server.
+     */
+    public void deathMessage(@Nullable net.kyori.adventure.text.Component deathMessage) {
+        this.deathMessage = null;
+        this.adventure$deathMessage = deathMessage;
+    }
+
+    /**
+     * Get the death message that will appear to everyone on the server.
+     *
+     * @return Message to appear to other players on the server.
+     */
+    public @Nullable net.kyori.adventure.text.Component deathMessage() {
+        return this.adventure$deathMessage;
+    }
+    // Paper end
+
     /**
      * Set the death message that will appear to everyone on the server.
      *
      * @param deathMessage Message to appear to other players on the server.
+     * @deprecated in favour of {@link #deathMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setDeathMessage(@Nullable String deathMessage) {
         this.deathMessage = deathMessage;
+        this.adventure$deathMessage = deathMessage != null ? org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(deathMessage) : net.kyori.adventure.text.Component.empty(); // Paper
     }
 
     /**
      * Get the death message that will appear to everyone on the server.
      *
      * @return Message to appear to other players on the server.
+     * @deprecated in favour of {@link #deathMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getDeathMessage() {
-        return deathMessage;
+        return this.deathMessage != null ? this.deathMessage : (this.adventure$deathMessage != null ? getDeathMessageString(this.adventure$deathMessage) : null); // Paper
     }
-
+    // Paper start //TODO: add translation API to drop String deathMessage in favor of just Adventure
+    private static String getDeathMessageString(net.kyori.adventure.text.Component component) {
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(component);
+    }
+    // Paper end
     /**
      * Gets how much EXP the Player should have at respawn.
      * <p>
diff --git a/src/main/java/org/bukkit/event/inventory/InventoryType.java b/src/main/java/org/bukkit/event/inventory/InventoryType.java
index 441362d2fbdc9413ed64a1f00b50fb6d06327e79..e1e7f45fd0f65d0874dd0698da436c7ac2e7951b 100644
--- a/src/main/java/org/bukkit/event/inventory/InventoryType.java
+++ b/src/main/java/org/bukkit/event/inventory/InventoryType.java
@@ -140,6 +140,18 @@ public enum InventoryType {
     private final String title;
     private final boolean isCreatable;
 
+    // Paper start
+    private final net.kyori.adventure.text.Component defaultTitleComponent;
+
+    /**
+     * Gets the inventory's default title.
+     *
+     * @return the inventory's default title
+     */
+    public @NotNull net.kyori.adventure.text.Component defaultTitle() {
+        return defaultTitleComponent;
+    }
+    // Paper end
     private InventoryType(int defaultSize, /*@NotNull*/ String defaultTitle) {
         this(defaultSize, defaultTitle, true);
     }
@@ -148,6 +160,7 @@ public enum InventoryType {
         size = defaultSize;
         title = defaultTitle;
         this.isCreatable = isCreatable;
+        this.defaultTitleComponent = net.kyori.adventure.text.Component.text(defaultTitle); // Paper - Adventure
     }
 
     public int getDefaultSize() {
@@ -155,6 +168,7 @@ public enum InventoryType {
     }
 
     @NotNull
+    @Deprecated // Paper
     public String getDefaultTitle() {
         return title;
     }
diff --git a/src/main/java/org/bukkit/event/player/AsyncPlayerChatEvent.java b/src/main/java/org/bukkit/event/player/AsyncPlayerChatEvent.java
index 9c68c3f2d61500479f48b80264f625aaae2f3204..399afcd19fcb6acd24857ed6ab48cf0d105a01a3 100644
--- a/src/main/java/org/bukkit/event/player/AsyncPlayerChatEvent.java
+++ b/src/main/java/org/bukkit/event/player/AsyncPlayerChatEvent.java
@@ -22,7 +22,11 @@ import org.jetbrains.annotations.NotNull;
  * <p>
  * Care should be taken to check {@link #isAsynchronous()} and treat the event
  * appropriately.
+ *
+ * @deprecated use {@link io.papermc.paper.event.player.AsyncChatEvent} instead
  */
+@Deprecated // Paper
+@org.bukkit.Warning(value = false, reason = "Don't nag on old event yet") // Paper
 public class AsyncPlayerChatEvent extends PlayerEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
     private boolean cancel = false;
diff --git a/src/main/java/org/bukkit/event/player/AsyncPlayerPreLoginEvent.java b/src/main/java/org/bukkit/event/player/AsyncPlayerPreLoginEvent.java
index 9866c07c999f46cb585709804aaad710c3031d5a..31f6f781a0403bf6388d668f0effaed5aae94468 100644
--- a/src/main/java/org/bukkit/event/player/AsyncPlayerPreLoginEvent.java
+++ b/src/main/java/org/bukkit/event/player/AsyncPlayerPreLoginEvent.java
@@ -14,7 +14,7 @@ import org.jetbrains.annotations.NotNull;
 public class AsyncPlayerPreLoginEvent extends Event {
     private static final HandlerList handlers = new HandlerList();
     private Result result;
-    private String message;
+    private net.kyori.adventure.text.Component message; // Paper
     private final String name;
     private final InetAddress ipAddress;
     private final UUID uniqueId;
@@ -27,7 +27,7 @@ public class AsyncPlayerPreLoginEvent extends Event {
     public AsyncPlayerPreLoginEvent(@NotNull final String name, @NotNull final InetAddress ipAddress, @NotNull final UUID uniqueId) {
         super(true);
         this.result = Result.ALLOWED;
-        this.message = "";
+        this.message = net.kyori.adventure.text.Component.empty(); // Paper
         this.name = name;
         this.ipAddress = ipAddress;
         this.uniqueId = uniqueId;
@@ -79,6 +79,7 @@ public class AsyncPlayerPreLoginEvent extends Event {
         this.result = result == null ? null : Result.valueOf(result.name());
     }
 
+    // Paper start
     /**
      * Gets the current kick message that will be used if getResult() !=
      * Result.ALLOWED
@@ -86,7 +87,7 @@ public class AsyncPlayerPreLoginEvent extends Event {
      * @return Current kick message
      */
     @NotNull
-    public String getKickMessage() {
+    public net.kyori.adventure.text.Component kickMessage() {
         return message;
     }
 
@@ -95,16 +96,66 @@ public class AsyncPlayerPreLoginEvent extends Event {
      *
      * @param message New kick message
      */
-    public void setKickMessage(@NotNull final String message) {
+    public void kickMessage(@NotNull final net.kyori.adventure.text.Component message) {
+        this.message = message;
+    }
+
+    /**
+     * Disallows the player from logging in, with the given reason
+     *
+     * @param result New result for disallowing the player
+     * @param message Kick message to display to the user
+     */
+    public void disallow(@NotNull final Result result, @NotNull final net.kyori.adventure.text.Component message) {
+        this.result = result;
         this.message = message;
     }
 
+    /**
+     * Disallows the player from logging in, with the given reason
+     *
+     * @param result New result for disallowing the player
+     * @param message Kick message to display to the user
+     * @deprecated This method uses a deprecated enum from {@link
+     *     PlayerPreLoginEvent}
+     * @see #disallow(Result, String)
+     */
+    @Deprecated
+    public void disallow(@NotNull final PlayerPreLoginEvent.Result result, @NotNull final net.kyori.adventure.text.Component message) {
+        this.result = result == null ? null : Result.valueOf(result.name());
+        this.message = message;
+    }
+    // Paper end
+    /**
+     * Gets the current kick message that will be used if getResult() !=
+     * Result.ALLOWED
+     *
+     * @return Current kick message
+     * @deprecated in favour of {@link #kickMessage()}
+     */
+    @NotNull
+    @Deprecated // Paper
+    public String getKickMessage() {
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.message); // Paper
+    }
+
+    /**
+     * Sets the kick message to display if getResult() != Result.ALLOWED
+     *
+     * @param message New kick message
+     * @deprecated in favour of {@link #kickMessage(net.kyori.adventure.text.Component)}
+     */
+    @Deprecated // Paper
+    public void setKickMessage(@NotNull final String message) {
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message); // Paper
+    }
+
     /**
      * Allows the player to log in
      */
     public void allow() {
         result = Result.ALLOWED;
-        message = "";
+        message = net.kyori.adventure.text.Component.empty(); // Paper
     }
 
     /**
@@ -112,10 +163,12 @@ public class AsyncPlayerPreLoginEvent extends Event {
      *
      * @param result New result for disallowing the player
      * @param message Kick message to display to the user
+     * @deprecated in favour of {@link #disallow(org.bukkit.event.player.AsyncPlayerPreLoginEvent.Result, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void disallow(@NotNull final Result result, @NotNull final String message) {
         this.result = result;
-        this.message = message;
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message); // Paper
     }
 
     /**
@@ -130,7 +183,7 @@ public class AsyncPlayerPreLoginEvent extends Event {
     @Deprecated
     public void disallow(@NotNull final PlayerPreLoginEvent.Result result, @NotNull final String message) {
         this.result = result == null ? null : Result.valueOf(result.name());
-        this.message = message;
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/event/player/PlayerChatEvent.java b/src/main/java/org/bukkit/event/player/PlayerChatEvent.java
index 8ea56aac752544f798728b429e7152afbee497e4..213837794c603cb9f152f917941b912326a08030 100644
--- a/src/main/java/org/bukkit/event/player/PlayerChatEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerChatEvent.java
@@ -18,6 +18,7 @@ import org.jetbrains.annotations.NotNull;
  *     Listening to this event forces chat to wait for the main thread which
  *     causes delays for chat. {@link AsyncPlayerChatEvent} is the encouraged
  *     alternative for thread safe implementations.
+ * @deprecated use {@link io.papermc.paper.event.player.ChatEvent} instead
  */
 @Deprecated
 @Warning(reason = "Listening to this event forces chat to wait for the main thread, delaying chat messages.")
diff --git a/src/main/java/org/bukkit/event/player/PlayerEvent.java b/src/main/java/org/bukkit/event/player/PlayerEvent.java
index 793b661b6d2d05de3d7f4fc26a4c018a2af58e62..f6d3b817de3001f04ea4554c7c39a1290af3fd6d 100644
--- a/src/main/java/org/bukkit/event/player/PlayerEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerEvent.java
@@ -14,7 +14,7 @@ public abstract class PlayerEvent extends Event {
         player = who;
     }
 
-    PlayerEvent(@NotNull final Player who, boolean async) {
+    public PlayerEvent(@NotNull final Player who, boolean async) { // Paper - public
         super(async);
         player = who;
 
diff --git a/src/main/java/org/bukkit/event/player/PlayerJoinEvent.java b/src/main/java/org/bukkit/event/player/PlayerJoinEvent.java
index d06684aba7688ce06777dbd837a46856a9d7767f..851a189d42e271679abc78f95049d8badf7a2b64 100644
--- a/src/main/java/org/bukkit/event/player/PlayerJoinEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerJoinEvent.java
@@ -10,30 +10,60 @@ import org.jetbrains.annotations.Nullable;
  */
 public class PlayerJoinEvent extends PlayerEvent {
     private static final HandlerList handlers = new HandlerList();
-    private String joinMessage;
+    // Paper start
+    private net.kyori.adventure.text.Component joinMessage;
+    public PlayerJoinEvent(@NotNull final Player playerJoined, @Nullable final net.kyori.adventure.text.Component joinMessage) {
+        super(playerJoined);
+        this.joinMessage = joinMessage;
+    }
 
+    @Deprecated // Paper end
     public PlayerJoinEvent(@NotNull final Player playerJoined, @Nullable final String joinMessage) {
         super(playerJoined);
+        this.joinMessage = joinMessage != null ? org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(joinMessage) : null; // Paper end
+    }
+
+    // Paper start
+    /**
+     * Gets the join message to send to all online players
+     *
+     * @return string join message. Can be null
+     */
+    public @Nullable net.kyori.adventure.text.Component joinMessage() {
+        return this.joinMessage;
+    }
+
+    /**
+     * Sets the join message to send to all online players
+     *
+     * @param joinMessage join message. If null, no message will be sent
+     */
+    public void joinMessage(@Nullable net.kyori.adventure.text.Component joinMessage) {
         this.joinMessage = joinMessage;
     }
+    // Paper end
 
     /**
      * Gets the join message to send to all online players
      *
      * @return string join message. Can be null
+     * @deprecated in favour of {@link #joinMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getJoinMessage() {
-        return joinMessage;
+        return this.joinMessage == null ? null : org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.joinMessage); // Paper
     }
 
     /**
      * Sets the join message to send to all online players
      *
      * @param joinMessage join message. If null, no message will be sent
+     * @deprecated in favour of {@link #joinMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setJoinMessage(@Nullable String joinMessage) {
-        this.joinMessage = joinMessage;
+        this.joinMessage = joinMessage != null ? org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(joinMessage) : null; // Paper
     }
 
     @NotNull
diff --git a/src/main/java/org/bukkit/event/player/PlayerKickEvent.java b/src/main/java/org/bukkit/event/player/PlayerKickEvent.java
index 14c337f15fc804f52e52cb0a185aad38d89303a8..5c0efe74237dbe6803ce023fde99682ff70d1a92 100644
--- a/src/main/java/org/bukkit/event/player/PlayerKickEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerKickEvent.java
@@ -10,35 +10,84 @@ import org.jetbrains.annotations.NotNull;
  */
 public class PlayerKickEvent extends PlayerEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
-    private String leaveMessage;
-    private String kickReason;
+    private net.kyori.adventure.text.Component leaveMessage; // Paper
+    private net.kyori.adventure.text.Component kickReason; // Paper
     private Boolean cancel;
 
+    @Deprecated // Paper
     public PlayerKickEvent(@NotNull final Player playerKicked, @NotNull final String kickReason, @NotNull final String leaveMessage) {
+        super(playerKicked);
+        this.kickReason = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(kickReason); // Paper
+        this.leaveMessage = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(leaveMessage); // Paper
+        this.cancel = false;
+    }
+    // Paper start
+    public PlayerKickEvent(@NotNull final Player playerKicked, @NotNull final net.kyori.adventure.text.Component kickReason, @NotNull final net.kyori.adventure.text.Component leaveMessage) {
         super(playerKicked);
         this.kickReason = kickReason;
         this.leaveMessage = leaveMessage;
         this.cancel = false;
     }
 
+    /**
+     * Gets the leave message send to all online players
+     *
+     * @return string kick reason
+     */
+    public @NotNull net.kyori.adventure.text.Component leaveMessage() {
+        return this.leaveMessage;
+    }
+
+    /**
+     * Sets the leave message send to all online players
+     *
+     * @param leaveMessage leave message
+     */
+    public void leaveMessage(@NotNull net.kyori.adventure.text.Component leaveMessage) {
+        this.leaveMessage = leaveMessage;
+    }
+
     /**
      * Gets the reason why the player is getting kicked
      *
      * @return string kick reason
      */
+    public @NotNull net.kyori.adventure.text.Component reason() {
+        return this.kickReason;
+    }
+
+    /**
+     * Sets the reason why the player is getting kicked
+     *
+     * @param kickReason kick reason
+     */
+    public void reason(@NotNull net.kyori.adventure.text.Component kickReason) {
+        this.kickReason = kickReason;
+    }
+    // Paper end
+
+    /**
+     * Gets the reason why the player is getting kicked
+     *
+     * @return string kick reason
+     * @deprecated in favour of {@link #reason()}
+     */
     @NotNull
+    @Deprecated // Paper
     public String getReason() {
-        return kickReason;
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.kickReason); // Paper
     }
 
     /**
      * Gets the leave message send to all online players
      *
      * @return string kick reason
+     * @deprecated in favour of {@link #leaveMessage()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getLeaveMessage() {
-        return leaveMessage;
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.leaveMessage); // Paper
     }
 
     @Override
@@ -55,18 +104,22 @@ public class PlayerKickEvent extends PlayerEvent implements Cancellable {
      * Sets the reason why the player is getting kicked
      *
      * @param kickReason kick reason
+     * @deprecated in favour of {@link #reason(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setReason(@NotNull String kickReason) {
-        this.kickReason = kickReason;
+        this.kickReason = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(kickReason); // Paper
     }
 
     /**
      * Sets the leave message send to all online players
      *
      * @param leaveMessage leave message
+     * @deprecated in favour of {@link #leaveMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setLeaveMessage(@NotNull String leaveMessage) {
-        this.leaveMessage = leaveMessage;
+        this.leaveMessage = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(leaveMessage); // Paper
     }
 
     @NotNull
diff --git a/src/main/java/org/bukkit/event/player/PlayerLocaleChangeEvent.java b/src/main/java/org/bukkit/event/player/PlayerLocaleChangeEvent.java
index 36b436e145a7215682b692a87ab894df25752c1d..ebd499c1a2d11ea068e8c374edbc3967e4cece3d 100644
--- a/src/main/java/org/bukkit/event/player/PlayerLocaleChangeEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerLocaleChangeEvent.java
@@ -12,17 +12,31 @@ public class PlayerLocaleChangeEvent extends PlayerEvent {
     private static final HandlerList handlers = new HandlerList();
     //
     private final String locale;
+    // Paper start
+    private final java.util.Locale adventure$locale;
+    /**
+     * @see Player#getLocale()
+     *
+     * @return the player's new locale
+     */
+    public @NotNull java.util.Locale locale() {
+        return this.adventure$locale;
+    }
+    // Paper end
 
     public PlayerLocaleChangeEvent(@NotNull Player who, @NotNull String locale) {
         super(who);
         this.locale = locale;
+        this.adventure$locale = net.kyori.adventure.translation.Translator.parseLocale(locale); // Paper
     }
 
     /**
      * @return the player's new locale
      * @see Player#getLocale()
+     * @deprecated in favour of {@link #locale()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getLocale() {
         return locale;
     }
diff --git a/src/main/java/org/bukkit/event/player/PlayerLoginEvent.java b/src/main/java/org/bukkit/event/player/PlayerLoginEvent.java
index 084ca8cfcb7381bfa4fa6280748cf9b81210a9c1..75cc54739ef841cd90568d74927d6002d4cfa7e0 100644
--- a/src/main/java/org/bukkit/event/player/PlayerLoginEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerLoginEvent.java
@@ -17,7 +17,7 @@ public class PlayerLoginEvent extends PlayerEvent {
     private final InetAddress address;
     private final String hostname;
     private Result result = Result.ALLOWED;
-    private String message = "";
+    private net.kyori.adventure.text.Component message = net.kyori.adventure.text.Component.empty();
     private final InetAddress realAddress; // Spigot
 
     /**
@@ -53,12 +53,52 @@ public class PlayerLoginEvent extends PlayerEvent {
      * @param result The result status for this event
      * @param message The message to be displayed if result denies login
      * @param realAddress the actual, unspoofed connecting address
+     * @deprecated in favour of {@link #PlayerLoginEvent(Player, String, InetAddress, Result, net.kyori.adventure.text.Component, InetAddress)}
      */
+    @Deprecated // Paper
     public PlayerLoginEvent(@NotNull final Player player, @NotNull String hostname, @NotNull final InetAddress address, @NotNull final Result result, @NotNull final String message, @NotNull final InetAddress realAddress) { // Spigot
         this(player, hostname, address, realAddress); // Spigot
         this.result = result;
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message); // Paper
+    }
+
+    // Paper start
+    /**
+     * This constructor pre-configures the event with a result and message
+     *
+     * @param player The {@link Player} for this event
+     * @param hostname The hostname that was used to connect to the server
+     * @param address The address the player used to connect, provided for
+     *     timing issues
+     * @param result The result status for this event
+     * @param message The message to be displayed if result denies login
+     * @param realAddress the actual, unspoofed connecting address
+     */
+    public PlayerLoginEvent(@NotNull final Player player, @NotNull String hostname, @NotNull final InetAddress address, @NotNull final Result result, @NotNull final net.kyori.adventure.text.Component message, @NotNull final InetAddress realAddress) { // Spigot
+        this(player, hostname, address, realAddress); // Spigot
+        this.result = result;
+        this.message = message;
+    }
+
+    /**
+     * Gets the current kick message that will be used if getResult() !=
+     * Result.ALLOWED
+     *
+     * @return Current kick message
+     */
+    public @NotNull net.kyori.adventure.text.Component kickMessage() {
+        return this.message;
+    }
+
+    /**
+     * Sets the kick message to display if getResult() != Result.ALLOWED
+     *
+     * @param message New kick message
+     */
+    public void kickMessage(@NotNull net.kyori.adventure.text.Component message) {
         this.message = message;
     }
+    // Paper end
 
     // Spigot start
     /**
@@ -96,19 +136,23 @@ public class PlayerLoginEvent extends PlayerEvent {
      * Result.ALLOWED
      *
      * @return Current kick message
+     * @deprecated in favour of {@link #kickMessage()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getKickMessage() {
-        return message;
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.message); // Paper
     }
 
     /**
      * Sets the kick message to display if getResult() != Result.ALLOWED
      *
      * @param message New kick message
+     * @deprecated in favour of {@link #kickMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setKickMessage(@NotNull final String message) {
-        this.message = message;
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message); // Paper
     }
 
     /**
@@ -127,7 +171,7 @@ public class PlayerLoginEvent extends PlayerEvent {
      */
     public void allow() {
         result = Result.ALLOWED;
-        message = "";
+        message = net.kyori.adventure.text.Component.empty(); // Paper
     }
 
     /**
@@ -135,8 +179,21 @@ public class PlayerLoginEvent extends PlayerEvent {
      *
      * @param result New result for disallowing the player
      * @param message Kick message to display to the user
+     * @deprecated in favour of {@link #disallow(Result, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper start
     public void disallow(@NotNull final Result result, @NotNull final String message) {
+        this.result = result;
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message);
+    }
+    /**
+     * Disallows the player from logging in, with the given reason
+     *
+     * @param result New result for disallowing the player
+     * @param message Kick message to display to the user
+     */
+    public void disallow(@NotNull final Result result, @NotNull final net.kyori.adventure.text.Component message) {
+        // Paper end
         this.result = result;
         this.message = message;
     }
diff --git a/src/main/java/org/bukkit/event/player/PlayerPreLoginEvent.java b/src/main/java/org/bukkit/event/player/PlayerPreLoginEvent.java
index fb066251f793ec3b41bfc075b9478901b15ee549..123979ed64939d615b061f91c19c630e1e1db8c7 100644
--- a/src/main/java/org/bukkit/event/player/PlayerPreLoginEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerPreLoginEvent.java
@@ -19,7 +19,7 @@ import org.jetbrains.annotations.NotNull;
 public class PlayerPreLoginEvent extends Event {
     private static final HandlerList handlers = new HandlerList();
     private Result result;
-    private String message;
+    private net.kyori.adventure.text.Component message; // Paper
     private final String name;
     private final InetAddress ipAddress;
     private final UUID uniqueId;
@@ -31,7 +31,7 @@ public class PlayerPreLoginEvent extends Event {
 
     public PlayerPreLoginEvent(@NotNull final String name, @NotNull final InetAddress ipAddress, @NotNull final UUID uniqueId) {
         this.result = Result.ALLOWED;
-        this.message = "";
+        this.message = net.kyori.adventure.text.Component.empty(); // Paper
         this.name = name;
         this.ipAddress = ipAddress;
         this.uniqueId = uniqueId;
@@ -56,6 +56,7 @@ public class PlayerPreLoginEvent extends Event {
         this.result = result;
     }
 
+    // Paper start
     /**
      * Gets the current kick message that will be used if getResult() !=
      * Result.ALLOWED
@@ -63,7 +64,7 @@ public class PlayerPreLoginEvent extends Event {
      * @return Current kick message
      */
     @NotNull
-    public String getKickMessage() {
+    public net.kyori.adventure.text.Component kickMessage() {
         return message;
     }
 
@@ -72,16 +73,51 @@ public class PlayerPreLoginEvent extends Event {
      *
      * @param message New kick message
      */
-    public void setKickMessage(@NotNull final String message) {
+    public void kickMessage(@NotNull final net.kyori.adventure.text.Component message) {
         this.message = message;
     }
 
+    /**
+     * Disallows the player from logging in, with the given reason
+     *
+     * @param result New result for disallowing the player
+     * @param message Kick message to display to the user
+     */
+    public void disallow(@NotNull final Result result, @NotNull final net.kyori.adventure.text.Component message) {
+        this.result = result;
+        this.message = message;
+    }
+    // Paper end
+    /**
+     * Gets the current kick message that will be used if getResult() !=
+     * Result.ALLOWED
+     *
+     * @return Current kick message
+     * @deprecated in favour of {@link #kickMessage()}
+     */
+    @Deprecated // Paper
+    @NotNull
+    public String getKickMessage() {
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.message); // Paper
+    }
+
+    /**
+     * Sets the kick message to display if getResult() != Result.ALLOWED
+     *
+     * @param message New kick message
+     * @deprecated in favour of {@link #kickMessage(net.kyori.adventure.text.Component)}
+     */
+    @Deprecated // Paper
+    public void setKickMessage(@NotNull final String message) {
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message); // Paper
+    }
+
     /**
      * Allows the player to log in
      */
     public void allow() {
         result = Result.ALLOWED;
-        message = "";
+        message = net.kyori.adventure.text.Component.empty(); // Paper
     }
 
     /**
@@ -89,10 +125,12 @@ public class PlayerPreLoginEvent extends Event {
      *
      * @param result New result for disallowing the player
      * @param message Kick message to display to the user
+     * @deprecated in favour of {@link #disallow(org.bukkit.event.player.PlayerPreLoginEvent.Result, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void disallow(@NotNull final Result result, @NotNull final String message) {
         this.result = result;
-        this.message = message;
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/event/player/PlayerQuitEvent.java b/src/main/java/org/bukkit/event/player/PlayerQuitEvent.java
index d70c25f404e994766a9ebce89a917c8d0719777c..849e8f10dd77e9fb46aab17752b8f1ff79e9d42e 100644
--- a/src/main/java/org/bukkit/event/player/PlayerQuitEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerQuitEvent.java
@@ -10,30 +10,59 @@ import org.jetbrains.annotations.Nullable;
  */
 public class PlayerQuitEvent extends PlayerEvent {
     private static final HandlerList handlers = new HandlerList();
-    private String quitMessage;
+    private net.kyori.adventure.text.Component quitMessage; // Paper
 
+    @Deprecated // Paper
     public PlayerQuitEvent(@NotNull final Player who, @Nullable final String quitMessage) {
         super(who);
+        this.quitMessage = quitMessage != null ? org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(quitMessage) : null; // Paper
+    }
+    // Paper start
+    public PlayerQuitEvent(@NotNull final Player who, @Nullable final net.kyori.adventure.text.Component quitMessage) {
+        super(who);
+        this.quitMessage = quitMessage;
+    }
+
+    /**
+     * Gets the quit message to send to all online players
+     *
+     * @return string quit message
+     */
+    public @Nullable net.kyori.adventure.text.Component quitMessage() {
+        return quitMessage;
+    }
+
+    /**
+     * Sets the quit message to send to all online players
+     *
+     * @param quitMessage quit message
+     */
+    public void quitMessage(@Nullable net.kyori.adventure.text.Component quitMessage) {
         this.quitMessage = quitMessage;
     }
+    // Paper end
 
     /**
      * Gets the quit message to send to all online players
      *
      * @return string quit message
+     * @deprecated in favour of {@link #quitMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getQuitMessage() {
-        return quitMessage;
+        return this.quitMessage == null ? null : org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.quitMessage); // Paper
     }
 
     /**
      * Sets the quit message to send to all online players
      *
      * @param quitMessage quit message
+     * @deprecated in favour of {@link #quitMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setQuitMessage(@Nullable String quitMessage) {
-        this.quitMessage = quitMessage;
+        this.quitMessage = quitMessage != null ? org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(quitMessage) : null; // Paper
     }
 
     @NotNull
diff --git a/src/main/java/org/bukkit/event/server/BroadcastMessageEvent.java b/src/main/java/org/bukkit/event/server/BroadcastMessageEvent.java
index 03bfca9d368bbe4b7c1353d52c883e756bf69bda..4f8c85222c7bd33217c7db0ff5f47bf397f8f3e5 100644
--- a/src/main/java/org/bukkit/event/server/BroadcastMessageEvent.java
+++ b/src/main/java/org/bukkit/event/server/BroadcastMessageEvent.java
@@ -18,7 +18,7 @@ import org.jetbrains.annotations.NotNull;
 public class BroadcastMessageEvent extends ServerEvent implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
-    private String message;
+    private net.kyori.adventure.text.Component message; // Paper
     private final Set<CommandSender> recipients;
     private boolean cancelled = false;
 
@@ -27,29 +27,66 @@ public class BroadcastMessageEvent extends ServerEvent implements Cancellable {
         this(false, message, recipients);
     }
 
+    @Deprecated // Paper
     public BroadcastMessageEvent(boolean isAsync, @NotNull String message, @NotNull Set<CommandSender> recipients) {
+        // Paper start
+        super(isAsync);
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message);
+        this.recipients = recipients;
+    }
+
+    @Deprecated
+    public BroadcastMessageEvent(@NotNull net.kyori.adventure.text.Component message, @NotNull Set<CommandSender> recipients) {
+        this(false, message, recipients);
+    }
+
+    public BroadcastMessageEvent(boolean isAsync, @NotNull net.kyori.adventure.text.Component message, @NotNull Set<CommandSender> recipients) {
+        // Paper end
         super(isAsync);
         this.message = message;
         this.recipients = recipients;
     }
+    // Paper start
+    /**
+     * Get the broadcast message.
+     *
+     * @return Message to broadcast
+     */
+    public @NotNull net.kyori.adventure.text.Component message() {
+        return this.message;
+    }
+
+    /**
+     * Set the broadcast message.
+     *
+     * @param message New message to broadcast
+     */
+    public void message(@NotNull net.kyori.adventure.text.Component message) {
+        this.message = message;
+    }
+    // Paper end
 
     /**
      * Get the message to broadcast.
      *
      * @return Message to broadcast
+     * @deprecated in favour of {@link #message()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getMessage() {
-        return message;
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.message); // Paper
     }
 
     /**
      * Set the message to broadcast.
      *
      * @param message New message to broadcast
+     * @deprecated in favour of {@link #message(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setMessage(@NotNull String message) {
-        this.message = message;
+        this.message = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(message); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/event/server/ServerListPingEvent.java b/src/main/java/org/bukkit/event/server/ServerListPingEvent.java
index cc5e2fef75736e56420df4cf4f83152fa97926df..fd4db14bef92b893ddaf5424e14ee71da22dcf84 100644
--- a/src/main/java/org/bukkit/event/server/ServerListPingEvent.java
+++ b/src/main/java/org/bukkit/event/server/ServerListPingEvent.java
@@ -21,15 +21,16 @@ public class ServerListPingEvent extends ServerEvent implements Iterable<Player>
     private static final int MAGIC_PLAYER_COUNT = Integer.MIN_VALUE;
     private static final HandlerList handlers = new HandlerList();
     private final InetAddress address;
-    private String motd;
+    private net.kyori.adventure.text.Component motd; // Paper
     private final int numPlayers;
     private int maxPlayers;
 
+    @Deprecated // Paper
     public ServerListPingEvent(@NotNull final InetAddress address, @NotNull final String motd, final int numPlayers, final int maxPlayers) {
         super(true);
         Validate.isTrue(numPlayers >= 0, "Cannot have negative number of players online", numPlayers);
         this.address = address;
-        this.motd = motd;
+        this.motd = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(motd); // Paper
         this.numPlayers = numPlayers;
         this.maxPlayers = maxPlayers;
     }
@@ -42,14 +43,58 @@ public class ServerListPingEvent extends ServerEvent implements Iterable<Player>
      * @param address the address of the pinger
      * @param motd the message of the day
      * @param maxPlayers the max number of players
+     * @deprecated in favour of {@link #ServerListPingEvent(java.net.InetAddress, net.kyori.adventure.text.Component, int)}
      */
+    @Deprecated // Paper
     protected ServerListPingEvent(@NotNull final InetAddress address, @NotNull final String motd, final int maxPlayers) {
+        super(true);
+        this.numPlayers = MAGIC_PLAYER_COUNT;
+        this.address = address;
+        this.motd = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(motd); // Paper
+        this.maxPlayers = maxPlayers;
+    }
+    // Paper start
+    public ServerListPingEvent(@NotNull final InetAddress address, @NotNull final net.kyori.adventure.text.Component motd, final int numPlayers, final int maxPlayers) {
+        super(true);
+        Validate.isTrue(numPlayers >= 0, "Cannot have negative number of players online", numPlayers);
+        this.address = address;
+        this.motd = motd;
+        this.numPlayers = numPlayers;
+        this.maxPlayers = maxPlayers;
+    }
+    /**
+     * This constructor is intended for implementations that provide the
+     * {@link #iterator()} method, thus provided the {@link #getNumPlayers()}
+     * count.
+     *
+     * @param address the address of the pinger
+     * @param motd the message of the day
+     * @param maxPlayers the max number of players
+     */
+    protected ServerListPingEvent(@NotNull final InetAddress address, @NotNull final net.kyori.adventure.text.Component motd, final int maxPlayers) {
         super(true);
         this.numPlayers = MAGIC_PLAYER_COUNT;
         this.address = address;
         this.motd = motd;
         this.maxPlayers = maxPlayers;
     }
+    /**
+     * Get the message of the day message.
+     *
+     * @return the message of the day
+     */
+    public @NotNull net.kyori.adventure.text.Component motd() {
+        return motd;
+    }
+    /**
+     * Change the message of the day message.
+     *
+     * @param motd the message of the day
+     */
+    public void motd(@NotNull net.kyori.adventure.text.Component motd) {
+        this.motd = motd;
+    }
+    // Paper end
 
     /**
      * Get the address the ping is coming from.
@@ -65,19 +110,23 @@ public class ServerListPingEvent extends ServerEvent implements Iterable<Player>
      * Get the message of the day message.
      *
      * @return the message of the day
+     * @deprecated in favour of {@link #motd()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getMotd() {
-        return motd;
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.motd); // Paper
     }
 
     /**
      * Change the message of the day message.
      *
      * @param motd the message of the day
+     * @deprecated in favour of {@link #motd(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setMotd(@NotNull String motd) {
-        this.motd = motd;
+        this.motd = org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(motd); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/inventory/InventoryView.java b/src/main/java/org/bukkit/inventory/InventoryView.java
index 14346d83bc99581b18e53d19af03708c0bf22cf7..664de64b020cf9090a2fbee0afe2bfaf150adc3c 100644
--- a/src/main/java/org/bukkit/inventory/InventoryView.java
+++ b/src/main/java/org/bukkit/inventory/InventoryView.java
@@ -446,11 +446,25 @@ public abstract class InventoryView {
         return getPlayer().setWindowProperty(prop, value);
     }
 
+    // Paper start
     /**
      * Get the title of this inventory window.
      *
      * @return The title.
      */
     @NotNull
+    public /*abstract*/ net.kyori.adventure.text.Component title() {
+        return org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(this.getTitle());
+    }
+    // Paper end
+
+    /**
+     * Get the title of this inventory window.
+     *
+     * @return The title.
+     * @deprecated in favour of {@link #title()}
+     */
+    @Deprecated // Paper
+    @NotNull
     public abstract String getTitle();
 }
diff --git a/src/main/java/org/bukkit/inventory/ItemFactory.java b/src/main/java/org/bukkit/inventory/ItemFactory.java
index f89d71b77d1200314df6ca23614d5ca6fb15ceb3..af4a7ce37eb10bab06eadb6583c7894b3ec55ae6 100644
--- a/src/main/java/org/bukkit/inventory/ItemFactory.java
+++ b/src/main/java/org/bukkit/inventory/ItemFactory.java
@@ -159,4 +159,24 @@ public interface ItemFactory {
     @Deprecated
     @NotNull
     Material updateMaterial(@NotNull final ItemMeta meta, @NotNull final Material material) throws IllegalArgumentException;
+
+    // Paper start
+    /**
+     * Creates a hover event for the given item.
+     *
+     * @param item The item
+     * @return A hover event
+     */
+    @NotNull
+    net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowItem> asHoverEvent(final @NotNull ItemStack item, final @NotNull java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowItem> op);
+
+    /**
+     * Get the formatted display name of the {@link ItemStack}.
+     *
+     * @param itemStack the {@link ItemStack}
+     * @return display name of the {@link ItemStack}
+     */
+    @NotNull
+    net.kyori.adventure.text.Component displayName(@NotNull ItemStack itemStack);
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
index f70a6a22b85ff0da76e67e9b223ad4e0b020b5c4..a15abec467bac70116a6fc21a300d4930b909f15 100644
--- a/src/main/java/org/bukkit/inventory/ItemStack.java
+++ b/src/main/java/org/bukkit/inventory/ItemStack.java
@@ -22,7 +22,7 @@ import org.jetbrains.annotations.Nullable;
  * use this class to encapsulate Materials for which {@link Material#isItem()}
  * returns false.</b>
  */
-public class ItemStack implements Cloneable, ConfigurationSerializable {
+public class ItemStack implements Cloneable, ConfigurationSerializable, net.kyori.adventure.text.event.HoverEventSource<net.kyori.adventure.text.event.HoverEvent.ShowItem> { // Paper
     private Material type = Material.AIR;
     private int amount = 0;
     private MaterialData data = null;
@@ -595,4 +595,21 @@ public class ItemStack implements Cloneable, ConfigurationSerializable {
 
         return true;
     }
+
+    // Paper start
+    @NotNull
+    @Override
+    public net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowItem> asHoverEvent(final @NotNull java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowItem> op) {
+        return org.bukkit.Bukkit.getServer().getItemFactory().asHoverEvent(this, op);
+    }
+
+    /**
+     * Get the formatted display name of the {@link ItemStack}.
+     *
+     * @return display name of the {@link ItemStack}
+     */
+    public @NotNull net.kyori.adventure.text.Component displayName() {
+        return Bukkit.getServer().getItemFactory().displayName(this);
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/inventory/meta/BookMeta.java b/src/main/java/org/bukkit/inventory/meta/BookMeta.java
index 94852d50e88d0594b84b581cd627174043629995..36bcbb3f3acedf7ebecbf6f6b358cf64af0edfb2 100644
--- a/src/main/java/org/bukkit/inventory/meta/BookMeta.java
+++ b/src/main/java/org/bukkit/inventory/meta/BookMeta.java
@@ -10,7 +10,7 @@ import org.jetbrains.annotations.Nullable;
  * Represents a book ({@link Material#WRITABLE_BOOK} or {@link
  * Material#WRITTEN_BOOK}) that can have a title, an author, and pages.
  */
-public interface BookMeta extends ItemMeta {
+public interface BookMeta extends ItemMeta, net.kyori.adventure.inventory.Book { // Paper
 
     /**
      * Represents the generation (or level of copying) of a written book
@@ -119,6 +119,118 @@ public interface BookMeta extends ItemMeta {
      */
     boolean hasPages();
 
+    // Paper start
+    /**
+     * Gets the title of the book.
+     * <p>
+     * Plugins should check that hasTitle() returns true before calling this
+     * method.
+     *
+     * @return the title of the book
+     */
+    @Nullable
+    @Override
+    net.kyori.adventure.text.Component title();
+
+    /**
+     * Sets the title of the book.
+     * <p>
+     * Limited to 32 characters. Removes title when given null.
+     *
+     * @param title the title to set
+     * @return the same {@link BookMeta} instance
+     */
+    @NotNull
+    @Override
+    @org.checkerframework.common.returnsreceiver.qual.This BookMeta title(@Nullable net.kyori.adventure.text.Component title);
+
+    /**
+     * Gets the author of the book.
+     * <p>
+     * Plugins should check that hasAuthor() returns true before calling this
+     * method.
+     *
+     * @return the author of the book
+     */
+    @Nullable
+    @Override
+    net.kyori.adventure.text.Component author();
+
+    /**
+     * Sets the author of the book. Removes author when given null.
+     *
+     * @param author the author to set
+     * @return the same {@link BookMeta} instance
+     */
+    @NotNull
+    @Override
+    @org.checkerframework.common.returnsreceiver.qual.This BookMeta author(@Nullable net.kyori.adventure.text.Component author);
+
+    /**
+     * Gets the specified page in the book. The page must exist.
+     * <p>
+     * Pages are 1-indexed.
+     *
+     * @param page the page number to get, in range [1, getPageCount()]
+     * @return the page from the book
+     */
+    @NotNull net.kyori.adventure.text.Component page(int page);
+
+    /**
+     * Sets the specified page in the book. Pages of the book must be
+     * contiguous.
+     * <p>
+     * The data can be up to 256 characters in length, additional characters
+     * are truncated.
+     * <p>
+     * Pages are 1-indexed.
+     *
+     * @param page the page number to set, in range [1, getPageCount()]
+     * @param data the data to set for that page
+     */
+    void page(int page, @NotNull net.kyori.adventure.text.Component data);
+
+    /**
+     * Adds new pages to the end of the book. Up to a maximum of 50 pages with
+     * 256 characters per page.
+     *
+     * @param pages A list of strings, each being a page
+     */
+    void addPages(@NotNull net.kyori.adventure.text.Component... pages);
+
+    interface BookMetaBuilder extends Builder {
+
+        @NotNull
+        @Override
+        BookMetaBuilder title(@Nullable net.kyori.adventure.text.Component title);
+
+        @NotNull
+        @Override
+        BookMetaBuilder author(@Nullable net.kyori.adventure.text.Component author);
+
+        @NotNull
+        @Override
+        BookMetaBuilder addPage(@NotNull net.kyori.adventure.text.Component page);
+
+        @NotNull
+        @Override
+        BookMetaBuilder pages(@NotNull net.kyori.adventure.text.Component... pages);
+
+        @NotNull
+        @Override
+        BookMetaBuilder pages(@NotNull java.util.Collection<net.kyori.adventure.text.Component> pages);
+
+        @NotNull
+        @Override
+        BookMeta build();
+    }
+
+    @Override
+    @org.checkerframework.checker.nullness.qual.NonNull
+    BookMetaBuilder toBuilder();
+
+    // Paper end
+
     /**
      * Gets the specified page in the book. The given page must exist.
      * <p>
@@ -126,8 +238,10 @@ public interface BookMeta extends ItemMeta {
      *
      * @param page the page number to get, in range [1, getPageCount()]
      * @return the page from the book
+     * @deprecated in favour of {@link #page(int)}
      */
     @NotNull
+    @Deprecated // Paper
     String getPage(int page);
 
     /**
@@ -141,15 +255,19 @@ public interface BookMeta extends ItemMeta {
      *
      * @param page the page number to set, in range [1, getPageCount()]
      * @param data the data to set for that page
+     * @deprecated in favour of {@link #page(int, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setPage(int page, @NotNull String data);
 
     /**
      * Gets all the pages in the book.
      *
      * @return list of all the pages in the book
+     * @deprecated in favour of {@link #pages()}
      */
     @NotNull
+    @Deprecated // Paper
     List<String> getPages();
 
     /**
@@ -157,7 +275,9 @@ public interface BookMeta extends ItemMeta {
      * pages. Maximum 100 pages with 256 characters per page.
      *
      * @param pages A list of pages to set the book to use
+     * @deprecated in favour of {@link #pages(List)}
      */
+    @Deprecated // Paper
     void setPages(@NotNull List<String> pages);
 
     /**
@@ -165,7 +285,9 @@ public interface BookMeta extends ItemMeta {
      * pages. Maximum 50 pages with 256 characters per page.
      *
      * @param pages A list of strings, each being a page
+     * @deprecated in favour of {@link #pages(net.kyori.adventure.text.Component...)}
      */
+    @Deprecated // Paper
     void setPages(@NotNull String... pages);
 
     /**
@@ -173,7 +295,9 @@ public interface BookMeta extends ItemMeta {
      * 256 characters per page.
      *
      * @param pages A list of strings, each being a page
+     * @deprecated in favour of {@link #addPages(net.kyori.adventure.text.Component...)}
      */
+    @Deprecated // Paper
     void addPage(@NotNull String... pages);
 
     /**
@@ -195,8 +319,10 @@ public interface BookMeta extends ItemMeta {
          *
          * @param page the page number to get
          * @return the page from the book
+         * @deprecated in favour of {@link #page(int)}
          */
         @NotNull
+        @Deprecated // Paper
         public BaseComponent[] getPage(int page) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -210,7 +336,9 @@ public interface BookMeta extends ItemMeta {
          *
          * @param page the page number to set
          * @param data the data to set for that page
+         * @deprecated in favour of {@link #page(int, net.kyori.adventure.text.Component)}
          */
+        @Deprecated // Paper
         public void setPage(int page, @Nullable BaseComponent... data) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -219,8 +347,10 @@ public interface BookMeta extends ItemMeta {
          * Gets all the pages in the book.
          *
          * @return list of all the pages in the book
+         * @deprecated in favour of {@link #pages()}
          */
         @NotNull
+        @Deprecated // Paper
         public List<BaseComponent[]> getPages() {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -230,7 +360,9 @@ public interface BookMeta extends ItemMeta {
          * pages. Maximum 50 pages with 256 characters per page.
          *
          * @param pages A list of pages to set the book to use
+         * @deprecated in favour of {@link #pages(java.util.List)}
          */
+        @Deprecated // Paper
         public void setPages(@NotNull List<BaseComponent[]> pages) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -240,7 +372,9 @@ public interface BookMeta extends ItemMeta {
          * pages. Maximum 50 pages with 256 characters per page.
          *
          * @param pages A list of component arrays, each being a page
+         * @deprecated in favour of {@link #pages(net.kyori.adventure.text.Component...)}
          */
+        @Deprecated // Paper
         public void setPages(@NotNull BaseComponent[]... pages) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -250,7 +384,9 @@ public interface BookMeta extends ItemMeta {
          * with 256 characters per page.
          *
          * @param pages A list of component arrays, each being a page
+         * @deprecated in favour of {@link #addPages(net.kyori.adventure.text.Component...)}
          */
+        @Deprecated // Paper
         public void addPage(@NotNull BaseComponent[]... pages) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
diff --git a/src/main/java/org/bukkit/inventory/meta/ItemMeta.java b/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
index 91eee1470f0969e9eef0753c0c700ae5354f1acc..69f68ca2d62c2cfe07a193776054c14c352a5942 100644
--- a/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
+++ b/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
@@ -31,6 +31,24 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      */
     boolean hasDisplayName();
 
+    // Paper start
+    /**
+     * Gets the display name.
+     *
+     * <p>Plugins should check that {@link #hasDisplayName()} returns <code>true</code> before calling this method.</p>
+     *
+     * @return the display name
+     */
+    @Nullable net.kyori.adventure.text.Component displayName();
+
+    /**
+     * Sets the display name.
+     *
+     * @param displayName the display name to set
+     */
+    void displayName(final @Nullable net.kyori.adventure.text.Component displayName);
+    // Paper end
+
     /**
      * Gets the display name that is set.
      * <p>
@@ -38,7 +56,9 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      * before calling this method.
      *
      * @return the display name that is set
+     * @deprecated in favour of {@link #displayName()}
      */
+    @Deprecated // Paper
     @NotNull
     String getDisplayName();
 
@@ -46,7 +66,9 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      * Sets the display name.
      *
      * @param name the name to set
+     * @deprecated in favour of {@link #displayName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setDisplayName(@Nullable String name);
 
     /**
@@ -81,6 +103,24 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      */
     boolean hasLore();
 
+    // Paper start
+    /**
+     * Gets the lore.
+     *
+     * <p>Plugins should check that {@link #hasLore()} returns <code>true</code> before calling this method.</p>
+     *
+     * @return the display name
+     */
+    @Nullable List<net.kyori.adventure.text.Component> lore();
+
+    /**
+     * Sets the lore.
+     *
+     * @param lore the lore to set
+     */
+    void lore(final @Nullable List<net.kyori.adventure.text.Component> lore);
+    // Paper end
+
     /**
      * Gets the lore that is set.
      * <p>
@@ -88,7 +128,9 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      * calling this method.
      *
      * @return a list of lore that is set
+     * @deprecated in favour of {@link #lore()}
      */
+    @Deprecated // Paper
     @Nullable
     List<String> getLore();
 
@@ -97,7 +139,9 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      * Removes lore when given null.
      *
      * @param lore the lore that will be set
+     * @deprecated in favour of {@link #lore(List)}
      */
+    @Deprecated // Paper
     void setLore(@Nullable List<String> lore);
 
     /**
diff --git a/src/main/java/org/bukkit/map/MapCursor.java b/src/main/java/org/bukkit/map/MapCursor.java
index 83354b2a38b6261b172b91c1008dcf3313cc4a8f..ed0bc2024a0bb85837e25f75ae89d1fe257b2e60 100644
--- a/src/main/java/org/bukkit/map/MapCursor.java
+++ b/src/main/java/org/bukkit/map/MapCursor.java
@@ -10,7 +10,7 @@ public final class MapCursor {
     private byte x, y;
     private byte direction, type;
     private boolean visible;
-    private String caption;
+    private net.kyori.adventure.text.Component caption; // Paper
 
     /**
      * Initialize the map cursor.
@@ -24,7 +24,7 @@ public final class MapCursor {
      */
     @Deprecated
     public MapCursor(byte x, byte y, byte direction, byte type, boolean visible) {
-        this(x, y, direction, type, visible, null);
+        this(x, y, direction, type, visible, (String) null); // Paper
     }
 
     /**
@@ -37,7 +37,7 @@ public final class MapCursor {
      * @param visible Whether the cursor is visible by default.
      */
     public MapCursor(byte x, byte y, byte direction, @NotNull Type type, boolean visible) {
-        this(x, y, direction, type, visible, null);
+        this(x, y, direction, type, visible, (String) null); // Paper
     }
 
     /**
@@ -49,7 +49,7 @@ public final class MapCursor {
      * @param type The type (color/style) of the map cursor.
      * @param visible Whether the cursor is visible by default.
      * @param caption cursor caption
-     * @deprecated Magic value
+     * @deprecated Magic value. Use {@link #MapCursor(byte, byte, byte, byte, boolean, net.kyori.adventure.text.Component)}
      */
     @Deprecated
     public MapCursor(byte x, byte y, byte direction, byte type, boolean visible, @Nullable String caption) {
@@ -58,8 +58,42 @@ public final class MapCursor {
         setDirection(direction);
         setRawType(type);
         this.visible = visible;
-        this.caption = caption;
+        this.caption = caption == null ? null : org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(caption); // Paper
     }
+    // Paper start
+    /**
+     * Initialize the map cursor.
+     *
+     * @param x The x coordinate, from -128 to 127.
+     * @param y The y coordinate, from -128 to 127.
+     * @param direction The facing of the cursor, from 0 to 15.
+     * @param type The type (color/style) of the map cursor.
+     * @param visible Whether the cursor is visible by default.
+     * @param caption cursor caption
+     * @deprecated Magic value
+     */
+    @Deprecated
+    public MapCursor(byte x, byte y, byte direction, byte type, boolean visible, @Nullable net.kyori.adventure.text.Component caption) {
+        this.x = x; this.y = y; this.visible = visible; this.caption = caption;
+        setDirection(direction);
+        setRawType(type);
+    }
+    /**
+     * Initialize the map cursor.
+     *
+     * @param x The x coordinate, from -128 to 127.
+     * @param y The y coordinate, from -128 to 127.
+     * @param direction The facing of the cursor, from 0 to 15.
+     * @param type The type (color/style) of the map cursor.
+     * @param visible Whether the cursor is visible by default.
+     * @param caption cursor caption
+     */
+    public MapCursor(byte x, byte y, byte direction, @NotNull Type type, boolean visible, @Nullable net.kyori.adventure.text.Component caption) {
+        this.x = x; this.y = y; this.visible = visible; this.caption = caption;
+        setDirection(direction);
+        setType(type);
+    }
+    // Paper end
 
     /**
      * Initialize the map cursor.
@@ -77,7 +111,7 @@ public final class MapCursor {
         setDirection(direction);
         setType(type);
         this.visible = visible;
-        this.caption = caption;
+        this.caption = caption == null ? null : org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(caption); // Paper
     }
 
     /**
@@ -200,23 +234,45 @@ public final class MapCursor {
         this.visible = visible;
     }
 
+    // Paper start
+    /**
+     * Gets the caption on this cursor.
+     *
+     * @return caption
+     */
+    public @Nullable net.kyori.adventure.text.Component caption() {
+        return this.caption;
+    }
+    /**
+     * Sets the caption on this cursor.
+     *
+     * @param caption new caption
+     */
+    public void caption(@Nullable net.kyori.adventure.text.Component caption) {
+        this.caption = caption;
+    }
+    // Paper end
     /**
      * Gets the caption on this cursor.
      *
      * @return caption
+     * @deprecated in favour of {@link #caption()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getCaption() {
-        return caption;
+        return this.caption == null ? null : org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().serialize(this.caption); // Paper
     }
 
     /**
      * Sets the caption on this cursor.
      *
      * @param caption new caption
+     * @deprecated in favour of {@link #caption(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setCaption(@Nullable String caption) {
-        this.caption = caption;
+        this.caption = caption == null ? null : org.bukkit.Bukkit.getUnsafe().legacyComponentSerializer().deserialize(caption); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/map/MapCursorCollection.java b/src/main/java/org/bukkit/map/MapCursorCollection.java
index 4dba721aefe4fc6699b3b4bfa7ecb0b19c2a2a1a..01dec2c877df58c9dc22445e8b1f9ce2e53066da 100644
--- a/src/main/java/org/bukkit/map/MapCursorCollection.java
+++ b/src/main/java/org/bukkit/map/MapCursorCollection.java
@@ -117,4 +117,22 @@ public final class MapCursorCollection {
     public MapCursor addCursor(int x, int y, byte direction, byte type, boolean visible, @Nullable String caption) {
         return addCursor(new MapCursor((byte) x, (byte) y, direction, type, visible, caption));
     }
+    // Paper start
+    /**
+     * Add a cursor to the collection.
+     *
+     * @param x The x coordinate, from -128 to 127.
+     * @param y The y coordinate, from -128 to 127.
+     * @param direction The facing of the cursor, from 0 to 15.
+     * @param type The type (color/style) of the map cursor.
+     * @param visible Whether the cursor is visible.
+     * @param caption banner caption
+     * @return The newly added MapCursor.
+     * @deprecated Magic value
+     */
+    @Deprecated
+    public @NotNull MapCursor addCursor(int x, int y, byte direction, byte type, boolean visible, @Nullable net.kyori.adventure.text.Component caption) {
+        return addCursor(new MapCursor((byte) x, (byte) y, direction, type, visible, caption));
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/permissions/Permissible.java b/src/main/java/org/bukkit/permissions/Permissible.java
index 228421154913116069c20323afb519bdde2134df..26791db3c267670d5782f1d2b67ff7d5b55b9dac 100644
--- a/src/main/java/org/bukkit/permissions/Permissible.java
+++ b/src/main/java/org/bukkit/permissions/Permissible.java
@@ -126,4 +126,34 @@ public interface Permissible extends ServerOperator {
      */
     @NotNull
     public Set<PermissionAttachmentInfo> getEffectivePermissions();
+
+    // Paper start - add TriState permission checks
+    /**
+     * Checks if this object has a permission set and, if it is set, the value of the permission.
+     *
+     * @param permission the permission to check
+     * @return a tri-state of if the permission is set and, if it is set, it's value
+     */
+    default net.kyori.adventure.util.@NotNull TriState permissionValue(final @NotNull Permission permission) {
+        if (this.isPermissionSet(permission)) {
+            return net.kyori.adventure.util.TriState.byBoolean(this.hasPermission(permission));
+        } else {
+            return net.kyori.adventure.util.TriState.NOT_SET;
+        }
+    }
+
+    /**
+     * Checks if this object has a permission set and, if it is set, the value of the permission.
+     *
+     * @param permission the permission to check
+     * @return a tri-state of if the permission is set and, if it is set, it's value
+     */
+    default net.kyori.adventure.util.@NotNull TriState permissionValue(final @NotNull String permission) {
+        if (this.isPermissionSet(permission)) {
+            return net.kyori.adventure.util.TriState.byBoolean(this.hasPermission(permission));
+        } else {
+            return net.kyori.adventure.util.TriState.NOT_SET;
+        }
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/scoreboard/Objective.java b/src/main/java/org/bukkit/scoreboard/Objective.java
index ff3fcb2697eb00736238d0efdcaefe43043334d3..75acd6f8f3d774bb79e8e513125e801c5569a244 100644
--- a/src/main/java/org/bukkit/scoreboard/Objective.java
+++ b/src/main/java/org/bukkit/scoreboard/Objective.java
@@ -19,14 +19,35 @@ public interface Objective {
      */
     @NotNull
     String getName() throws IllegalStateException;
+    // Paper start
+    /**
+     * Gets the name displayed to players for this objective
+     *
+     * @return this objective's display name
+     * @throws IllegalStateException if this objective has been unregistered
+     */
+    @NotNull net.kyori.adventure.text.Component displayName() throws IllegalStateException;
+    /**
+     * Sets the name displayed to players for this objective.
+     *
+     * @param displayName Display name to set
+     * @throws IllegalStateException if this objective has been unregistered
+     * @throws IllegalArgumentException if displayName is null
+     * @throws IllegalArgumentException if displayName is longer than 128
+     *     characters.
+     */
+    void displayName(@Nullable net.kyori.adventure.text.Component displayName) throws IllegalStateException, IllegalArgumentException;
+    // Paper end
 
     /**
      * Gets the name displayed to players for this objective
      *
      * @return this objective's display name
      * @throws IllegalStateException if this objective has been unregistered
+     * @deprecated in favour of {@link #displayName()}
      */
     @NotNull
+    @Deprecated // Paper
     String getDisplayName() throws IllegalStateException;
 
     /**
@@ -37,7 +58,9 @@ public interface Objective {
      * @throws IllegalArgumentException if displayName is null
      * @throws IllegalArgumentException if displayName is longer than 128
      *     characters.
+     * @deprecated in favour of {@link #displayName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setDisplayName(@NotNull String displayName) throws IllegalStateException, IllegalArgumentException;
 
     /**
diff --git a/src/main/java/org/bukkit/scoreboard/Scoreboard.java b/src/main/java/org/bukkit/scoreboard/Scoreboard.java
index 5c855dbd0da895392f7a6e92cdc90782baf614ad..1ada91d790abedbc9b3aeb6e96467a0d78560f15 100644
--- a/src/main/java/org/bukkit/scoreboard/Scoreboard.java
+++ b/src/main/java/org/bukkit/scoreboard/Scoreboard.java
@@ -27,6 +27,48 @@ public interface Scoreboard {
     @Deprecated
     @NotNull
     Objective registerNewObjective(@NotNull String name, @NotNull String criteria) throws IllegalArgumentException;
+    // Paper start
+    /**
+     * Registers an Objective on this Scoreboard
+     *
+     * @param name Name of the Objective
+     * @param criteria Criteria for the Objective
+     * @param displayName Name displayed to players for the Objective.
+     * @return The registered Objective
+     * @throws IllegalArgumentException if name is null
+     * @throws IllegalArgumentException if name is longer than 32767
+     *     characters.
+     * @throws IllegalArgumentException if criteria is null
+     * @throws IllegalArgumentException if displayName is null
+     * @throws IllegalArgumentException if displayName is longer than 128
+     *     characters.
+     * @throws IllegalArgumentException if an objective by that name already
+     *     exists
+     */
+    @NotNull
+    Objective registerNewObjective(@NotNull String name, @NotNull String criteria, @Nullable net.kyori.adventure.text.Component displayName) throws IllegalArgumentException;
+    /**
+     * Registers an Objective on this Scoreboard
+     *
+     * @param name Name of the Objective
+     * @param criteria Criteria for the Objective
+     * @param displayName Name displayed to players for the Objective.
+     * @param renderType Manner of rendering the Objective
+     * @return The registered Objective
+     * @throws IllegalArgumentException if name is null
+     * @throws IllegalArgumentException if name is longer than 32767
+     *     characters.
+     * @throws IllegalArgumentException if criteria is null
+     * @throws IllegalArgumentException if displayName is null
+     * @throws IllegalArgumentException if displayName is longer than 128
+     *     characters.
+     * @throws IllegalArgumentException if renderType is null
+     * @throws IllegalArgumentException if an objective by that name already
+     *     exists
+     */
+    @NotNull
+    Objective registerNewObjective(@NotNull String name, @NotNull String criteria, @Nullable net.kyori.adventure.text.Component displayName, @NotNull RenderType renderType) throws IllegalArgumentException;
+    // Paper end
 
     /**
      * Registers an Objective on this Scoreboard
@@ -44,8 +86,10 @@ public interface Scoreboard {
      *     characters.
      * @throws IllegalArgumentException if an objective by that name already
      *     exists
+     * @deprecated in favour of {@link #registerNewObjective(String, String, net.kyori.adventure.text.Component)}
      */
     @NotNull
+    @Deprecated // Paper
     Objective registerNewObjective(@NotNull String name, @NotNull String criteria, @NotNull String displayName) throws IllegalArgumentException;
 
     /**
@@ -66,8 +110,10 @@ public interface Scoreboard {
      * @throws IllegalArgumentException if renderType is null
      * @throws IllegalArgumentException if an objective by that name already
      *     exists
+     * @deprecated in favour of {@link #registerNewObjective(String, String, net.kyori.adventure.text.Component, RenderType)}
      */
     @NotNull
+    @Deprecated // Paper
     Objective registerNewObjective(@NotNull String name, @NotNull String criteria, @NotNull String displayName, @NotNull RenderType renderType) throws IllegalArgumentException;
 
     /**
diff --git a/src/main/java/org/bukkit/scoreboard/Team.java b/src/main/java/org/bukkit/scoreboard/Team.java
index 0db7fe1b9fe5621ceed3f4f046691e359f5949dd..07a9fa68075a2c5f5a4a7519976b506526d95ca0 100644
--- a/src/main/java/org/bukkit/scoreboard/Team.java
+++ b/src/main/java/org/bukkit/scoreboard/Team.java
@@ -22,14 +22,102 @@ public interface Team {
      */
     @NotNull
     String getName() throws IllegalStateException;
+    // Paper start
+    /**
+     * Gets the name displayed to entries for this team
+     *
+     * @return Team display name
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    @NotNull net.kyori.adventure.text.Component displayName() throws IllegalStateException;
+
+    /**
+     * Sets the name displayed to entries for this team
+     *
+     * @param displayName New display name
+     * @throws IllegalArgumentException if displayName is longer than 128
+     *     characters.
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    void displayName(@Nullable net.kyori.adventure.text.Component displayName) throws IllegalStateException, IllegalArgumentException;
+
+    /**
+     * Gets the prefix prepended to the display of entries on this team.
+     *
+     * @return Team prefix
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    @NotNull net.kyori.adventure.text.Component prefix() throws IllegalStateException;
+
+    /**
+     * Sets the prefix prepended to the display of entries on this team.
+     *
+     * @param prefix New prefix
+     * @throws IllegalArgumentException if prefix is null
+     *     characters
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    void prefix(@Nullable net.kyori.adventure.text.Component prefix) throws IllegalStateException, IllegalArgumentException;
+
+    /**
+     * Gets the suffix appended to the display of entries on this team.
+     *
+     * @return the team's current suffix
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    @NotNull net.kyori.adventure.text.Component suffix() throws IllegalStateException;
+
+    /**
+     * Sets the suffix appended to the display of entries on this team.
+     *
+     * @param suffix the new suffix for this team.
+     * @throws IllegalArgumentException if suffix is null
+     *     characters
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    void suffix(@Nullable net.kyori.adventure.text.Component suffix) throws IllegalStateException, IllegalArgumentException;
+
+    /**
+     * Checks if the team has a color specified
+     *
+     * @return true if it has a <b>color</b>
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    boolean hasColor();
+
+    /**
+     * Gets the color of the team.
+     * <br>
+     * This only sets the team outline, other occurrences of colors such as in
+     * names are handled by prefixes / suffixes.
+     *
+     * @return team color
+     * @throws IllegalStateException if this team has been unregistered
+     * @throws IllegalStateException if the team doesn't have a color
+     * @see #hasColor()
+     */
+    @NotNull net.kyori.adventure.text.format.TextColor color() throws IllegalStateException;
+
+    /**
+     * Sets the color of the team.
+     * <br>
+     * This only sets the team outline, other occurrences of colors such as in
+     * names are handled by prefixes / suffixes.
+     *
+     * @param color new color, null for no color
+     */
+    void color(@Nullable net.kyori.adventure.text.format.NamedTextColor color);
+    // Paper end
 
     /**
      * Gets the name displayed to entries for this team
      *
      * @return Team display name
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #displayName()}
      */
     @NotNull
+    @Deprecated // Paper
     String getDisplayName() throws IllegalStateException;
 
     /**
@@ -39,7 +127,9 @@ public interface Team {
      * @throws IllegalArgumentException if displayName is longer than 128
      *     characters.
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #displayName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setDisplayName(@NotNull String displayName) throws IllegalStateException, IllegalArgumentException;
 
     /**
@@ -47,8 +137,10 @@ public interface Team {
      *
      * @return Team prefix
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #prefix()}
      */
     @NotNull
+    @Deprecated // Paper
     String getPrefix() throws IllegalStateException;
 
     /**
@@ -59,7 +151,9 @@ public interface Team {
      * @throws IllegalArgumentException if prefix is longer than 64
      *     characters
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #prefix(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setPrefix(@NotNull String prefix) throws IllegalStateException, IllegalArgumentException;
 
     /**
@@ -67,8 +161,10 @@ public interface Team {
      *
      * @return the team's current suffix
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #suffix()}
      */
     @NotNull
+    @Deprecated // Paper
     String getSuffix() throws IllegalStateException;
 
     /**
@@ -79,7 +175,9 @@ public interface Team {
      * @throws IllegalArgumentException if suffix is longer than 64
      *     characters
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #suffix(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setSuffix(@NotNull String suffix) throws IllegalStateException, IllegalArgumentException;
 
     /**
@@ -90,8 +188,10 @@ public interface Team {
      *
      * @return team color, defaults to {@link ChatColor#RESET}
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #color()}
      */
     @NotNull
+    @Deprecated // Paper
     ChatColor getColor() throws IllegalStateException;
 
     /**
@@ -102,7 +202,9 @@ public interface Team {
      *
      * @param color new color, must be non-null. Use {@link ChatColor#RESET} for
      * no color
+     * @deprecated in favour of {@link #color(net.kyori.adventure.text.format.NamedTextColor)}
      */
+    @Deprecated // Paper
     void setColor(@NotNull ChatColor color);
 
     /**
diff --git a/src/test/java/org/bukkit/AnnotationTest.java b/src/test/java/org/bukkit/AnnotationTest.java
index c6a8a37a933cfc5a5885602a8a70fdda8fb6aa10..7f57b95727d0336f1f1548055574e0c129fe9643 100644
--- a/src/test/java/org/bukkit/AnnotationTest.java
+++ b/src/test/java/org/bukkit/AnnotationTest.java
@@ -26,6 +26,12 @@ import org.objectweb.asm.tree.ParameterNode;
 public class AnnotationTest {
 
     private static final String[] ACCEPTED_ANNOTATIONS = {
+        // Paper start
+        "Lorg/checkerframework/checker/nullness/qual/Nullable;",
+        "Lorg/checkerframework/checker/nullness/qual/NonNull;",
+        "Lorg/checkerframework/checker/nullness/qual/PolyNull;",
+        "Lorg/checkerframework/checker/nullness/qual/MonotonicNonNull;",
+        // Paper end
         "Lorg/jetbrains/annotations/Nullable;",
         "Lorg/jetbrains/annotations/NotNull;",
         "Lorg/jetbrains/annotations/Contract;",
@@ -105,7 +111,7 @@ public class AnnotationTest {
                         if (method.invisibleTypeAnnotations != null) {
                             for (final org.objectweb.asm.tree.TypeAnnotationNode invisibleTypeAnnotation : method.invisibleTypeAnnotations) {
                                 final org.objectweb.asm.TypeReference ref = new org.objectweb.asm.TypeReference(invisibleTypeAnnotation.typeRef);
-                                if (ref.getSort() == org.objectweb.asm.TypeReference.METHOD_FORMAL_PARAMETER && ref.getTypeParameterIndex() == i && java.util.Arrays.binarySearch(ACCEPTED_ANNOTATIONS, invisibleTypeAnnotation.desc) >= 0) {
+                                if (ref.getSort() == org.objectweb.asm.TypeReference.METHOD_FORMAL_PARAMETER && ref.getTypeParameterIndex() == i && org.apache.commons.lang.ArrayUtils.contains(ACCEPTED_ANNOTATIONS, invisibleTypeAnnotation.desc)) {
                                     continue dancing;
                                 }
                             }
