Solved Null Pointer Exception Error?

I cant understand error, this is my source;

Code:

package an.schaffer79.pbtr;

import org.bukkit.ChatColor;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.plugin.java.JavaPlugin;

import an.schaffer79.lib.RefStrings;
import an.schaffer79.pbtr.listeners.GunListener;
import an.schaffer79.pbtr.listeners.PlayerJoinListener;
import an.schaffer79.pbtr.listeners.ProjectileHitListener;

public class Main extends JavaPlugin {
    public FileConfiguration config = getConfig();
    public Game game;
   
    public void onEnable() {
        Game game = new Game(this);
        new PlayerJoinListener(this);
        new GunListener();
        new ProjectileHitListener(this);
        this.getServer().getConsoleSender().sendMessage(ChatColor.WHITE + "[" + RefStrings.NAME + "]" + ChatColor.AQUA + "Eklenti aktif -" + RefStrings.COMPANY);
        game.startGame(600);
    }
   
}

Code:

package an.schaffer79.pbtr;

import java.util.HashMap;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Score;
import org.bukkit.scoreboard.Scoreboard;
import org.bukkit.scoreboard.ScoreboardManager;

import an.schaffer79.lib.RefStrings;

public class Game {

    private Main main;
    public ScoreboardManager manager;
    public Objective objective;
    public Score score;
    public Score maviScore;
    public Score kirmiziScore;
   
    public HashMap<String, Integer>takim = new HashMap<String, Integer>();

    public Game(Main main) {
        this.main = main;
    }

    public void startGame(int zaman) {
       
        Bukkit.broadcastMessage(ChatColor.WHITE + "[" + RefStrings.NAME + "]" + ChatColor.AQUA + "Oyun başladı!.");
        Scoreboard board = manager.getNewScoreboard();
        Objective objective = board.registerNewObjective("skor", "dummy");
        objective.setDisplaySlot(DisplaySlot.SIDEBAR);
        objective.setDisplayName(ChatColor.WHITE + "Paintball");
        score = objective.getScore(Bukkit.getOfflinePlayer(ChatColor.AQUA + "Kalan Süre"));
        score.setScore(zaman);
        maviScore = objective.getScore(Bukkit.getOfflinePlayer(ChatColor.DARK_AQUA + "Mavi"));
        maviScore.setScore(0);
        kirmiziScore = objective.getScore(Bukkit.getOfflinePlayer(ChatColor.RED + "Kırmızı"));
        kirmiziScore.setScore(0);
       
        for(Player pl : Bukkit.getOnlinePlayers()) {
            pl.setScoreboard(board);
        }

        main.getServer().getScheduler().scheduleSyncRepeatingTask(main, new Runnable() {
            public void run() {
                score.setScore(score.getScore() - 1);
                if(score.getScore() <= 0) stopGame();
            }
        }, zaman, 20L);

    }

    public void stopGame() {
        String kazanan;
        if(maviScore.getScore() > kirmiziScore.getScore()) {
            kazanan = "mavi takım";
        }else if(kirmiziScore.getScore() > maviScore.getScore()) {
            kazanan = "kırmızı takım";
        }else {
            kazanan = "yok";
        }

        for(Player pl : Bukkit.getOnlinePlayers()) {
            pl.getInventory().clear();
            takim.put(pl.getName(), 2);
            pl.teleport(pl.getWorld().getSpawnLocation());
            pl.setScoreboard(manager.getNewScoreboard());
        }
        Bukkit.broadcastMessage(ChatColor.WHITE + "[" + RefStrings.NAME + "]" + ChatColor.AQUA + "Oyun bitti, kazanan taraf " + kazanan + "!");
    }

}

Error:

 

You are getting null because when you call your constructor in main (new Game(this)) You do not set the "manager" to a new instance. It will always be null because you have never set it a value.

 

Have you read this?
http://bukkit.org/threads/how-to-re...ubleshoot-your-own-plugins-by-yourself.32457/

 

Thank you guys, I solved my problem.