import org.bukkit.Location;

import org.bukkit.World;

import org.bukkit.World.Environment;

import org.bukkit.entity.Player;

import org.bukkit.event.EventHandler;

import org.bukkit.event.Listener;

import org.bukkit.event.player.PlayerMoveEvent;

import org.bukkit.plugin.java.JavaPlugin;

public class AntiNetherRoof extends JavaPlugin implements Listener {

private static final int NETHER_ROOF_Y = 128;

private static final int TELEPORT_Y = 122;

public void onEnable() {

this.getServer().getPluginManager().registerEvents(this, this);

System.out.println("AntiNetherRoofPlugin enabled!");

}

@EventHandler

public void onPlayerMove(PlayerMoveEvent event) {

Player player = event.getPlayer();

Location to = event.getTo();

World world = to.getWorld();

if (world != null && world.getEnvironment() == Environment.NETHER && to.getY() >= 128.0D && to.getY() == 128.0D) {

Location newLocation = new Location(world, to.getX(), 122.0D, to.getZ(), to.getYaw(), to.getPitch());

player.teleport(newLocation);

System.out.println("Player " + player.getName() + " attempted to access the Nether roof and was safely teleported to Y=" + 122);

}

}

public void onDisable() {

System.out.println("AntiNetherRoofPlugin disabled!");

}