Map Restoring

Hello everyone!

Currently I am making a mini-game, and after the game is over, I would like to reset the map. However, in the process of this, while unloading the world, I am getting some errors.

Code:

package com.GamerzKing.elementals.arena;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.World;
import org.bukkit.WorldCreator;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;

public class ArenaManager {

    public static void restoreMap(final String worldName, long delay, Plugin plugin) {

        final File sourceFolder = new File(plugin.getDataFolder().getPath() + File.separator + worldName);
        final File worldFolder = new File(worldName);
        final World world = Bukkit.getWorld(worldName);

        if (world != null) {
            for (Player players : world.getPlayers()) {
                if (players.isDead()) {

                    players.kickPlayer(ChatColor.RED + "You died!");
                }
            }

            Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {

                @Override
                public void run() {

                    if (world == null || Bukkit.unloadWorld(world, true)) {
                        try {

                            FileUtils.copyDirectory(sourceFolder, worldFolder);
                            FileUtils.deleteDirectory(worldFolder);

                            if (Bukkit.createWorld(new WorldCreator(worldName)) == null) {
                                System.out.println("An error occurred while loading the world " + worldName);

                            } else {

                                System.out.println("The world " + worldName + " has been restored successfully.");
                            }

                        } catch (IOException e) {
                            e.printStackTrace();
                        }

                    } else {

                        System.out.println("An error occurred while unloading the world " + worldName);
                    }
                }
            }, delay);
        }
    }
}

Code:

            ArenaManager.restoreMap("Lobby", 200, Main.getPlugin());

Code:

24.11 18:13:49 [Server] INFO An error occurred while unloading the world Lobby
24.11 18:13:50 [Server] INFO An error occurred while unloading the world Lobby
24.11 18:13:50 [Server] INFO An error occurred while unloading the world Lobby
24.11 18:13:51 [Server] INFO An error occurred while unloading the world Lobby
24.11 18:13:52 [Server] INFO An error occurred while unloading the world Lobby

If anyone can help solve this issue, that would be greatly appreciated!

 

@GamerzKing
The world is null, you have two a null check there that tell you that.

Have you typed it in correctly?
Try using Bukkit#getWorld("world_name"); ?