Remove LinkedList usage

https://twitter.com/joshbloch/status/583813919019573248

src/main/java/emu/grasscutter/plugin/PluginManager.java

@@ -181,7 +181,7 @@ public final class PluginManager {
         // Add the plugin to the list of loaded plugins.
         this.plugins.put(identifier.name, plugin);
         // Create a collection for the plugin's listeners.
-        this.listeners.put(plugin, new LinkedList<>());
+        this.listeners.put(plugin, new ArrayList<>());
 
         // Call the plugin's onLoad method.
         try {
@@ -242,18 +242,14 @@ public final class PluginManager {
      * @param priority The priority to call for.
      */
     private void checkAndFilter(Event event, HandlerPriority priority) {
-        // Create a collection of listeners.
-        List<EventHandler<? extends Event>> listeners = new LinkedList<>();
-
         // Add all listeners from every plugin.
-        this.listeners.values().forEach(listeners::addAll);
-
-        listeners.stream()
+        this.listeners.values().stream()
+            .flatMap(Collection::stream)
             // Filter the listeners by priority.
             .filter(handler -> handler.handles().isInstance(event))
             .filter(handler -> handler.getPriority() == priority)
             // Invoke the event.
-            .toList().forEach(handler -> this.invokeHandler(event, handler));
+            .forEach(handler -> this.invokeHandler(event, handler));
     }
 
     /**

src/main/java/emu/grasscutter/plugin/api/ServerHook.java

@@ -11,8 +11,9 @@ import emu.grasscutter.server.game.GameServer;
 import emu.grasscutter.server.http.HttpServer;
 import emu.grasscutter.server.http.Router;
 
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Stream;
 
 /**
  * Hooks into the {@link GameServer} class, adding convenient ways to do certain things.
@@ -60,8 +61,17 @@ public final class ServerHook {
      * Gets all online players.
      * @return Players connected to the server.
      */
+    @Deprecated(forRemoval = true)
     public List<Player> getOnlinePlayers() {
-        return new LinkedList<>(this.gameServer.getPlayers().values());
+        return new ArrayList<>(this.gameServer.getPlayers().values());
+    }
+
+    /**
+     * Gets all online players.
+     * @return Players connected to the server.
+     */
+    public Stream<Player> getOnlinePlayersStream() {
+        return this.gameServer.getPlayers().values().stream();
     }
 
     /**