Solved Null Pointer Exception on getWorldFolder()

Code:

Code:

package me.dajakos.uhc;

import java.io.File;

import org.bukkit.Bukkit;
import org.bukkit.World;
import org.bukkit.WorldCreator;
import org.bukkit.event.Listener;

public class editWorld implements Listener {

    private World world;

    public static void createWorld() {
        World world = Bukkit.getWorld("UHCWorld");
        WorldCreator creator = new WorldCreator("UHCWorld");
        creator.environment(World.Environment.NORMAL);
        creator.generateStructures(true);
        world = creator.createWorld();
    }

    public static void deleteWorld() {
        for (World w : Bukkit.getServer().getWorlds()) {
            if (w.getName().equals("UHCWorld")) {
                World unload = Bukkit.getWorld("UHCWorld");
                unloadWorld(unload);
            }
        }

        World delete = Bukkit.getWorld("UHCWorld");
        File deleteFolder = delete.getWorldFolder();

        //deleteW(deleteFolder);
    }

    public static boolean deleteW(File path) {
        if (path.exists()) {
            File files[] = path.listFiles();
            for (int i = 0; i < files.length; i++) {
                if (files.isDirectory()) {
                    deleteW(files);
                } else {
                    files.delete();
                }
            }
        }
        return (path.delete());
    }

    public static void unloadWorld(World world) {
        world = Bukkit.getWorld("");
        if (!world.equals(null)) {
            Bukkit.getServer().unloadWorld(world, true);
        }
    }
}

Error:

Code:

[17:38:01 INFO]: dajakos issued server command: /uhcstart
[17:38:01 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'uhcs
tart' in plugin UHC v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spi
got.jar:git-Spigot-b1e6da1-17962f6]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:14
1) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServe
r.java:645) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.PlayerConnection.handleCommand(PlayerCon
nection.java:1115) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java
:950) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java
:26) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java
:53) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spi
got.jar:git-Spigot-b1e6da1-17962f6]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_45]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_45]
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:6
83) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:3
16) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:6
23) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:526) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]
Caused by: java.lang.NullPointerException
        at me.dajakos.uhc.editWorld.deleteWorld(editWorld.java:31) ~[?:?]
        at me.dajakos.uhc.main.onCommand(main.java:48) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spi
got.jar:git-Spigot-b1e6da1-17962f6]
        ... 14 more

Thanks for any replies!

 

@dajako
Please follow java naming convention

Hmm, can we see the onCommand method? because i cant see where getWorldFolder is called in the code above that has to do with the error.

 

@dajako I guess the world is null. Just use a debug line to check that.

 

I've fixed it guys, I just entered the path manually rather than getting it from the World variable.

 

@dajako you could solve? because I'm having the same problem

 

Instead of:
File deleteFolder = delete.getWorldFolder();
I used:
File deleteFolder = new File("UHCWorld");

@@DriftCoder

 

@dajako a friend of mine gave me this same solution , but thanks anyway