needhelppvpon

package me.bennett.TheSearch;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.block.Block;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin implements Listener {

	public void onEnable(){
		PluginManager pm = Bukkit.getPluginManager();
		pm.registerEvents(this, this);
	}

	@EventHandler
	public void onBlockPlace(BlockPlaceEvent event) {
		Block block = event.getBlockPlaced();
		Player player = event.getPlayer();
		World world = (World) getServer().getWorlds();
		for(Player p : Bukkit.getOnlinePlayers()){
			if ((block.getType() == Material.DIAMOND_BLOCK) && (p.getWorld().getName().equalsIgnoreCase("TheSearch")){
				Bukkit.getServer().broadcastMessage(ChatColor.AQUA + "THE SEARCH IS OVER! PVP WILL BEGIN! LAST MAN STANDING WINS!");
				//on this line of code I want to make it so it changes pvp to on in the world "TheSearch"
			}
		}

	}




}