World Chat - Main Class

package me.gamingod;

import java.util.Set;

import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.AsyncPlayerChatEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin implements Listener {

    @Override
    public void onEnable() {
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
    }

    @EventHandler
    public void onChat(AsyncPlayerChatEvent e) {
        Player sender = e.getPlayer();
        Set<Player> r = e.getRecipients();
        for (Player pls : Bukkit.getServer().getOnlinePlayers()) {
                if (!pls.getWorld().getName().equals(sender.getWorld().getName())) {
                        r.remove(pls);
                }
        }
}

}