Solved Run another class during onEnable()

I made a situation where the default config only replaces the config when the config doesn't exist. When the config doesn't exist, a new config is created with the defaults. I want to create the default in another class and run them in the onEnable() in my main when appropiate. However, when I do this I get an error, hopefully you can help and it is a simple mistake I made!

Error:

Code:

java.lang.NullPointerException
        at me.tacos1223.NitroPvP.Main.onEnable(Main.java:96) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:316) ~[s
pigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:332) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:412) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugin(CraftServer.jav
a:476) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at org.bukkit.craftbukkit.v1_7_R4.CraftServer.enablePlugins(CraftServer.
java:394) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at net.minecraft.server.v1_7_R4.MinecraftServer.n(MinecraftServer.java:3
60) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at net.minecraft.server.v1_7_R4.MinecraftServer.g(MinecraftServer.java:3
34) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at net.minecraft.server.v1_7_R4.MinecraftServer.a(MinecraftServer.java:2
90) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at net.minecraft.server.v1_7_R4.DedicatedServer.init(DedicatedServer.jav
a:210) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java
:458) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:6
28) [spigot.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
[20:02:49 INFO]: Server permissions file permissions.yml is empty, ignoring it
[20:02:49 INFO]: Done (0.713s)! For help, type "help" or "?"
>

onEnable() in main:

Code:

    @Override
    public void onEnable()
    {   
        manager = new MyConfigManager(this);       
       
        instance = this;
       
        File configFile = new File(this.getDataFolder(), "config.yml");
        if (!configFile.exists())
        {
            String[] headerConfig = {"Main Config", "NitroPvP", "by tacos1223"};
            config = manager.getNewConfig("config.yml", headerConfig);
            configDefaultsInstance.runDefaultConfig();
                       
        }                                       
        registerListeners();
        registerCommands();
       
        PluginDescriptionFile pdfFile = this.getDescription();
        getLogger().info(pdfFile.getName() + " Version: " + pdfFile.getVersion() + " is now enabled!");
    }

configDefaults class:

Code:

package me.tacos1223.NitroPvP.Configs;


import org.bukkit.event.Listener;

import me.tacos1223.NitroPvP.Main;

public class configDefaults {
    Main instance;
   
    public static configDefaults configDefaultsInstance;
   
    public static configDefaults getInstance()
    {
        return configDefaultsInstance;
    }
   
    public void runDefaultConfig()
    {
        String[] lobbyComments = {"lobby spawn"};
        instance.config.set("lobbyspawn.X", lobbyComments);;
        instance.config.createSection("lobbyspawn.Y");;
        instance.config.createSection("lobbyspawn.Y");;
        instance.config.createSection("lobbyspawn.World");;
        instance.config.saveConfig();
    }
}

Hopefully you can help!
Thanks,
Tyler.

 

Which line is "Main:96"

And also, you don't need

Code:

getLogger().info(pdfFile.getName() + " Version: " + pdfFile.getVersion() + " is now enabled!");

Bukkit does that for you, you would have two messages saying the plugin was enabled.

 

@Gerov
Line 96 is:

Code:

configDefaultsInstance.runDefaultConfig();

 

Your instance variable was never initialized.

 

Ok got it!

Heres the solution:

Code:

public class configDefaults {
    private final Main instance;


    public configDefaults(Main instance)
    {
        this.instance = instance;
        instance.config.createSection("lobbyspawn.X");;
        instance.config.createSection("lobbyspawn.Y");;
        instance.config.createSection("lobbyspawn.Y");;
        instance.config.createSection("lobbyspawn.World");;
        instance.config.saveConfig(); 
    }
}

Code:

File configFile = new File(this.getDataFolder(), "config.yml");
        if (!configFile.exists())
        {
            String[] headerConfig = {"Main Config", "NitroPvP", "by tacos1223"};
            config = manager.getNewConfig("config.yml", headerConfig);
            configDefaults foo = new configDefaults(this);