Solved Plugin JavaNullPointer exception reach a class with listeners class

Hello, i've a problem with my plugin,

I want to create a plugin who change the Join and the Quit message, but i've an exception when i want to reach another class.


This is my Listeners class's code:

Code:

package be.detraziel.atypical.listeners;

import org.bukkit.Bukkit;
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.PlayerLoginEvent;
import org.bukkit.event.player.PlayerQuitEvent;

import be.detraziel.atypical.commands.Main;

public class JoinAndQuit implements Listener {
       
          private Main main;
         
          public JoinAndQuit(Main main) {
            this.main = main;
          }
         
         
          @EventHandler
          public boolean OnJoin(PlayerJoinEvent event) {
            Player player = event.getPlayer();
            event.setJoinMessage(null);
            for(Player p : Bukkit.getOnlinePlayers()){
            @SuppressWarnings("unused")
            String pname = player.getName();
            p.sendMessage("");
            }
          return true;
          }
         
          @EventHandler
          public boolean OnQuit(PlayerQuitEvent event) {
            Player player = event.getPlayer();
            event.setQuitMessage(null);
            for(Player p : Bukkit.getOnlinePlayers()){
            @SuppressWarnings("unused")
            String pname = player.getName();
            p.sendMessage(main.getConfig().getString(Main.crochet()).replace(main.getConfig().getString("TchatColor.Symbol"), "§") + main.getConfig().getString("JoinAndQuit.Quit").replace(main.getConfig().getString("TchatColor.Symbol"), "§"));
            }
              return true;           
          }
           
          @EventHandler
          public boolean onPlayerLoginEvent(final PlayerLoginEvent event) {
            Player player = event.getPlayer();
            if (!player.hasPlayedBefore()) {
            for(Player p : Bukkit.getOnlinePlayers()){
            @SuppressWarnings("unused")
            String pname = player.getName();
            p.sendMessage(main.getConfig().getString(Main.crochet()).replace(main.getConfig().getString("TchatColor.Symbol"), "§") + main.getConfig().getString("JoinAndQuit.FirstTime").replace(main.getConfig().getString("TchatColor.Symbol"), "§"));

}
            }
              return true;         
          }
}
         
         

And then, it's my Main class's what i want to reach:

Code:

package be.detraziel.atypical.commands;

import org.bukkit.plugin.java.JavaPlugin;

import be.detraziel.atypical.commands.Main;
import be.detraziel.atypical.listeners.ArrayLists;
import be.detraziel.atypical.listeners.Bot;
import be.detraziel.atypical.listeners.JoinAndQuit;
import be.detraziel.atypical.listeners.TchatColor;

public class Main extends JavaPlugin {
   
    public static String crochet() {
        String crochet = "Prefix.Tchat";
        return crochet;
    }
       
   
      @Override
    public void onEnable(){
        saveDefaultConfig();
        System.out.println("[Atypical]: " + getConfig().getString("Console.In").replace(getConfig().getString("TchatColor.Symbol"), "§"));
        if(getConfig().getString("TchatColor.Enabled") == "true"){   
        getServer().getPluginManager().registerEvents(new TchatColor(null), this);
        }
        if(getConfig().getString("JoinAndQuit.Enabled") == "true"){   
        getServer().getPluginManager().registerEvents(new JoinAndQuit(null), this);
        }
        //Ajout de commande Utils
        if(getConfig().getString("Utils.Enabled") == "true"){
        getCommand("Respond").setExecutor(new Respond(this));
        getCommand("Enderchest").setExecutor(new Enderchest(this));
        getCommand("Craft").setExecutor(new Craft(this));
        getCommand("JoinAndQuit").setExecutor(new JoinAndQuitC(this));
        }
        getServer().getPluginManager().registerEvents(new Bot(), this);
        getServer().getPluginManager().registerEvents(new ArrayLists(), this);
    }
   
      @Override
    public void onDisable() {
        System.out.println("[Atypical]: " + getConfig().getString("Console.Out").replace(getConfig().getString("TchatColor.Symbol"), "§"));
       
    }

}

Both are in different package.

Thanks a lot in advance for your piece of advice!

 

You need to create an instance of your listener in Main and pass Main to that in the parameters.

PHP:

new JoinAndQuit(this);

Also it is good practice to do the registerEvents part in the constructor for the listener.

 

Thanks @Kars for this advice, it works now.