Solved Problems with config in multiple classes

Hello!

I am fairly new to the Bukkit API and Java and I have just started work on a new, big, plugin and decided to give multiple classes ago. I followed a tutorial (Click Here) and had my classes set up in no time. Soon however I needed access to to the config and I soon find that it is not as easy as in 1 class. I follow this tutorial and I seem to understand it but I am getting an error:

Error (open) Error (close)

Code:

[21:07:03 ERROR]: Could not pass event PlayerJoinEvent to ClashOfCraftCore v1.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:297) ~[craftbukkit.jar:git-Bukkit-5cb9b70]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Bukkit-5cb9b70]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.PlayerList.onPlayerJoin(PlayerList.java:282) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.PlayerList.a(PlayerList.java:142) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.LoginListener.b(LoginListener.java:115) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.LoginListener.c(LoginListener.java:53) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.NetworkManager.a(NetworkManager.java:222) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.ServerConnection.c(SourceFile:168) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:742) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:336) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:626) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:534) [craftbukkit.jar:git-Bukkit-5cb9b70]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_60]
Caused by: java.lang.NullPointerException
        at me.TJM4.CoCore.CreateVillage.CreateVillageM(CreateVillage.java:32) ~[?:?]
        at me.TJM4.CoCore.FirstJoin.RecourcePackAccepted(FirstJoin.java:69) ~[?:?]
        at me.TJM4.CoCore.FirstJoin.onPlayerJoin(FirstJoin.java:49) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_60]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_60]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_60]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_60]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:295) ~[craftbukkit.jar:git-Bukkit-5cb9b70]
        ... 14 more

Line 32 in CreateVillage is:

Code:

p.sendMessage(plugin.getConfig().getString("Test"));

Line 69 in FirstJoin is:

Code:

cv.CreateVillageM(p);

And line 49 in FirstJoin is:

Code:

RecourcePackAccepted(p);

Just so you can look through all of my code, here it all is:

Main Class (open) Main Class (close)

Code:

package me.TJM4.CoCore;

import org.bukkit.Bukkit;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.event.Listener;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;
public class Main extends JavaPlugin{ //Extending JavaPlugin so that Bukkit knows its the main class...
    private static Plugin plugin;
    public void onEnable() {
        plugin = this;
       
       
        //Events:
       
        Bukkit.getServer().getPluginManager().registerEvents(new FirstJoin(), this);
       
        //Commands:
       
        //Config
        final FileConfiguration config = this.getConfig();
        config.options().copyDefaults(true);
        saveConfig();
       
    }
    public void onDisable() {
        plugin = null;//To stop memory leeks
    }
    //Much eaisier then registering events in 10 diffirent methods
    public static void registerEvents(org.bukkit.plugin.Plugin plugin, Listener... listeners) {
        for (Listener listener : listeners) {
            Bukkit.getServer().getPluginManager().registerEvents(listener, plugin);
        }
    }
    //To access the plugin variable from other classes
    public static Plugin getPlugin() {
        return plugin;
    }
}

FirstJoin class (open) FirstJoin class (close)

Code:

package me.TJM4.CoCore;

import java.util.ArrayList;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.GameMode;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

import com.connorlinfoot.actionbarapi.ActionBarAPI;
import com.connorlinfoot.titleapi.TitleAPI;

public class FirstJoin implements Listener{
    Main plugin;
   
    ArrayList<Player> NewJoins = new ArrayList<Player>();
   
    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent e) {
       
        Player p = e.getPlayer();
       
       
        if (p.hasPlayedBefore()) {
            NewJoins.add(p);
            //Creating location
            World w = Bukkit.getWorld("BaseWorld");
            double x = 3.500;
            double y = 84;
            double z = 3.500;
           
            Location l = new Location(w, x, y, z);
       
            //Teleporting to location
           
            p.teleport(l);
            p.setGameMode(GameMode.SPECTATOR);
            p.addPotionEffect(new PotionEffect(PotionEffectType.BLINDNESS, 100000, 30));
            ActionBarAPI.sendActionBar(p, ChatColor.YELLOW + "Waiting for recource pack accpetion");
            //TODO Add force recource pack
            RecourcePackAccepted(p);
        }
       

    }
    @EventHandler
    public void MoveEvent(PlayerMoveEvent e) {
        Player p = e.getPlayer();
        p.sendMessage("Move");
        p.sendMessage(NewJoins.toString());
        if (NewJoins.contains(p)) {
            p.teleport(e.getFrom());
        }
    }
   
    @SuppressWarnings("deprecation")
    public void RecourcePackAccepted(Player p) {
        TitleAPI.sendFullTitle(p, 20, 300, 20, (ChatColor.YELLOW + "Welcome!"), (ChatColor.GOLD + "Creating village..."));
        ActionBarAPI.sendActionBar(p, ChatColor.YELLOW + "Recource pack downloaded " + ChatColor.LIGHT_PURPLE + "☺");
        CreateVillage cv = new CreateVillage(plugin);
        cv.CreateVillageM(p);
    }

}

CreateVillage class (open) CreateVillage class (close)

Code:

package me.TJM4.CoCore;

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

import org.bukkit.Bukkit;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;

import com.sk89q.worldedit.EditSession;
import com.sk89q.worldedit.MaxChangedBlocksException;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.bukkit.BukkitWorld;
import com.sk89q.worldedit.bukkit.WorldEditPlugin;
import com.sk89q.worldedit.data.DataException;
import com.sk89q.worldedit.schematic.MCEditSchematicFormat;

@SuppressWarnings("deprecation")
public class CreateVillage {
   
    Main plugin;
    
    public CreateVillage(Main instance) {
    plugin = instance;
    }
       
       
       
        public void CreateVillageM(Player p) {
           
            p.sendMessage("Hi");
            p.sendMessage(plugin.getConfig().getString("Test"));
        }
         
}

Also, when I join, this is what I see:
View attachment 25460

I hope someone can help

Thanks,

- TJM4

 

This is a bad mix.

Caused by: java.lang.NullPointerException
at me.TJM4.CoCore.CreateVillage.CreateVillageM(CreateVillage.java:32) ~[?:?]

p.sendMessage(plugin.getConfig().getString("Test"));

As timtower said, you need to set plugin to something.

 

Sorry, its just my way of learning

Ok, this is going to sound very nooby and I am sorry for that but by setting plugin to something do you mean the following:

Code:

 Main plugin = new Main();

If that is the case I am getting an error when I add that as well. Please explain what you mean

 

@TJM4 Use a constructor for the main class

 

Thanks alot to everyone, I fixed this in the end!