Getting a world back from the config

So, ive got a config;

Code:

# Default config
location:
  worldblueflagspawn: world
  Xblueflagspawn: -329.60631036191387
  Yblueflagspawn: 24.5
  Zblueflagspawn: 1237.4847516713983
  worldspawn: world
  Xspawn: -329.4218194772162
  Yspawn: 64.0
  Zspawn: 1197.2321144446996
  worldredflagspawn: world
  Xredflagspawn: -329.66881066353
  Yredflagspawn: 24.5
  Zredflagspawn: 1147.2529804005433
  worldredspawn: world
  Xredspawn: -329.4240839753071
  Yredspawn: 4.0
  Zredspawn: 1116.3258540664715
  worldbluespawn: world
  Xbluespawn: -329.56349019030137
  Ybluespawn: 4.0
  Zbluespawn: 1268.7211798279554
max_points: 3
classes:
  newclass1:
    name: Demo
    inv:
      helmet: 306
      chestplate: 307
      leggings: 308
      boots: 309
      items: 1, 2, 3, 4

And some code;

Code:java

package org.gmail.firework4lj.util;
 
import java.util.List;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.DyeColor;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Item;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.util.Vector;
import org.gmail.firework4lj.CtfMain;
import org.gmail.firework4lj.listeners.FlagpickupListener;
 
public class Reloadgame {
 
    private static CtfMain ctfmain;
 
    public Reloadgame(CtfMain ctfMain) {
        this.ctfmain = ctfMain;
    }
 
    @SuppressWarnings("deprecation")
    public static void onRestartGame(){
        final String worldblueflag = ctfmain.getConfig().getString("location.worldblueflagspawn");
        final String worldredflag = ctfmain.getConfig().getString("location.worldredflagspawn");
        final ItemStack redflag = new ItemStack(Material.WOOL, 1, DyeColor.RED.getData());
        final ItemStack blueflag = new ItemStack(Material.WOOL, 1, DyeColor.BLUE.getData());
        final Location bluef = new Location(Bukkit.getServer().getWorld(worldblueflag), ctfmain.getConfig().getDouble("location.Xblueflagspawn"), ctfmain.getConfig().getDouble("location.Yblueflagspawn"), ctfmain.getConfig().getDouble("location.Zblueflagspawn"));
        final Location redf = new Location(Bukkit.getServer().getWorld(worldredflag), ctfmain.getConfig().getDouble("location.Xredflagspawn"), ctfmain.getConfig().getDouble("location.Yredflagspawn"), ctfmain.getConfig().getDouble("location.Zredflagspawn"));
 
        int seconds = 15;
        Bukkit.getServer().getScheduler()
                .scheduleSyncDelayedTask(ctfmain, new Runnable() {
                    public void run() {
                        for(String pl : CtfMain.ctfingame.keySet()){
                            Bukkit.getPlayerExact(pl).performCommand("ctfleave");
                        }
 
                        // TODO fix this part so its non server-wide
 
                        List<Entity> entlist = Bukkit.getWorld(worldredflag).getEntities();
                        for (Entity current : entlist) {
                            if (current instanceof Item) {
                                current.remove();
                            }
                        }
                        Bukkit.getWorld(worldredflag).dropItemNaturally(redf, redflag)
                                .setVelocity(new Vector(0D, 0D, 0D));
                        Bukkit.getWorld(worldblueflag).dropItemNaturally(bluef, blueflag)
                                .setVelocity(new Vector(0D, 0D, 0D));
                        CtfMain.blueflag.clear();
                        CtfMain.redflag.clear();
                        CtfMain.bluescore.clear();
                        CtfMain.redscore.clear();
                        CtfMain.ctfclass.clear();
                        CtfMain.teamblue.clear();
                        CtfMain.teamred.clear();
                        CtfMain.ctfingame.clear();
                        CtfMain.redscore.put("red", 0);
                        CtfMain.bluescore.put("blue", 0);
 
                    }
                }, (seconds * 20));
    }
 
}
 

And im getting this error;

Code:

2013-10-23 19:34:46 [SEVERE] Could not pass event PlayerPickupItemEvent to Ctf v0.0.3
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
    at net.minecraft.server.v1_6_R3.EntityItem.b_(EntityItem.java:227)
    at net.minecraft.server.v1_6_R3.EntityHuman.r(EntityHuman.java:426)
    at net.minecraft.server.v1_6_R3.EntityHuman.c(EntityHuman.java:418)
    at net.minecraft.server.v1_6_R3.EntityLiving.l_(EntityLiving.java:1277)
    at net.minecraft.server.v1_6_R3.EntityHuman.l_(EntityHuman.java:157)
    at net.minecraft.server.v1_6_R3.EntityPlayer.h(EntityPlayer.java:228)
    at net.minecraft.server.v1_6_R3.PlayerConnection.a(PlayerConnection.java:343)
    at net.minecraft.server.v1_6_R3.Packet10Flying.handle(SourceFile:136)
    at net.minecraft.server.v1_6_R3.NetworkManager.b(NetworkManager.java:296)
    at net.minecraft.server.v1_6_R3.PlayerConnection.e(PlayerConnection.java:116)
    at net.minecraft.server.v1_6_R3.ServerConnection.b(SourceFile:37)
    at net.minecraft.server.v1_6_R3.DedicatedServerConnection.b(SourceFile:30)
    at net.minecraft.server.v1_6_R3.MinecraftServer.t(MinecraftServer.java:592)
    at net.minecraft.server.v1_6_R3.DedicatedServer.t(DedicatedServer.java:227)
    at net.minecraft.server.v1_6_R3.MinecraftServer.s(MinecraftServer.java:488)
    at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:421)
    at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)
Caused by: java.lang.NullPointerException
    at org.gmail.firework4lj.util.Reloadgame.onRestartGame(Reloadgame.java:29)
    at org.gmail.firework4lj.listeners.FlagpickupListener.onPlayerPickupItem(FlagpickupListener.java:67)
    at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
    ... 20 more

And i don't know why its giving me a NPE for that... Anyone know what im overlooking?

 

It's because you're using a static method to access a static variable. You're setting it in the constructor, but that will only set it when you create a new instance of that class, so until you do that, the variable will be null.

tl;dr don't use static.

 

Gives me an error on Reloadgame.reloadGame(); in my other class. "Cannot make a static reference to the non-static method reloadGame() from the type Reloadgame"
Code (only like half the class to keep away code copiers):

Code:java

public class FlagpickupListener implements Listener {
 
    private CtfMain ctfmain;
 
    public FlagpickupListener(CtfMain ctfMain) {
        this.ctfmain = ctfMain;
    }
 
    // TODO Make it so players out of game can pick up items outside of game.
 
    @SuppressWarnings("deprecation")
    @EventHandler
    public void onPlayerPickupItem(PlayerPickupItemEvent event) {
        final String worldblueflag = ctfmain.getConfig().getString("location.worldblueflagspawn");
        final String worldredflag = ctfmain.getConfig().getString("location.worldredflagspawn");
        Player p = event.getPlayer();
        Item drop = event.getItem();
        String pn = event.getPlayer().getName();
        final ItemStack redflag = new ItemStack(Material.WOOL, 1, DyeColor.RED.getData());
        final ItemStack blueflag = new ItemStack(Material.WOOL, 1, DyeColor.BLUE.getData());
        final Location bluef = new Location (Bukkit.getServer().getWorld(worldblueflag), ctfmain.getConfig().getDouble("location.Xblueflagspawn"), ctfmain.getConfig().getDouble("location.Yblueflagspawn"), ctfmain.getConfig().getDouble("location.Zblueflagspawn"));
        final Location redf = new Location(Bukkit.getServer().getWorld(worldredflag), ctfmain.getConfig().getDouble("location.Xredflagspawn"), ctfmain.getConfig().getDouble("location.Yredflagspawn"), ctfmain.getConfig().getDouble("location.Zredflagspawn"));
        if(!CtfMain.ctfingame.containsKey(p.getName()) || p.isOp()){
            event.setCancelled(false);
        }
        if(CtfMain.ctfingame.get(p.getName()) == null){
            event.setCancelled(true);
        }
        if (drop.getItemStack().equals(redflag) && CtfMain.teamblue.containsKey(pn) && CtfMain.ctfingame.containsKey(p.getName())) {
            CtfMain.redflag.put("redflag", pn);
            for(String pl : CtfMain.ctfingame.keySet()){
                Bukkit.getPlayerExact(pl).sendMessage(ChatColor.BLUE + pn + ChatColor.RED+ " Stole the redflag!");
            }
        } else if (drop.getItemStack().equals(redflag)&& p.getInventory().contains(blueflag) && CtfMain.ctfingame.containsKey(p.getName())) {
            for(String pl : CtfMain.ctfingame.keySet()){
                Bukkit.getPlayerExact(pl).sendMessage(ChatColor.RED + pn + ChatColor.GOLD    + " Has captured the " + ChatColor.BLUE + "blue teams "+ ChatColor.GOLD + "flag!");
            }
            int before = CtfMain.redscore.get("red");
            int after = before + 1;
            CtfMain.redscore.put("red", after);
 
            // RESTART GAME MECHANICS
            if (CtfMain.redscore.get("red") == ctfmain.getConfig().getInt("max_points")) {
                for(String pl : CtfMain.ctfingame.keySet()){
                    Bukkit.getPlayerExact(pl).sendMessage(ChatColor.GOLD + "Good game! Team "+ ChatColor.RED + "red " + ChatColor.GOLD+ "wins! Restarting game in 15 seconds.");
                }
                Reloadgame.reloadGame();
            }

 

Yeah, because it's non-static you have to create an instance of the class.

Code:

Reloadgame r = new Reloadgame(this);