NullPointerException

Hi hi developers.
So i was making my custom survival games plugin and suddenly my console gave a NullPointerException i have no idea why. This is my code:

Code:

package me.CheesyFreezy.Scoreboard;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Set;

import me.CheesyFreezy.Main.Core;
import me.CheesyFreezy.Main.Plugin;
import me.CheesyFreezy.Saves.Files;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Score;
import org.bukkit.scoreboard.ScoreboardManager;

@SuppressWarnings("unused")
public class Scoreboard {
    private ScoreboardManager sbManager;
    private org.bukkit.scoreboard.Scoreboard Lscoreboard = null;
    private org.bukkit.scoreboard.Scoreboard SGscoreboard = null;
 
    private Objective Lobj = null;
    private Objective SGobj = null;
 
    private Score Lempty1 = null;
    private Score Lempty2 = null;
    private Score Lempty3 = null;
 
    private Score SGempty1 = null;
    private Score SGempty2 = null;
    private Score SGempty3 = null;
 
    private Score Lrank = null;
    private Score Lcredits = null;
    private Score Lstaff = null;
    private Score Lwebsite = null;
 
    private Score SGplayers = null;
    private Score SGclass = null;
    private Score SGtime = null;
    private Score SGwebsite = null;
 
    public int totalStaff = 0;
    private int time = -1;
 
    private HashMap<String, Integer> SGtotalPlayers = new HashMap<String, Integer>();
 
    @SuppressWarnings("deprecation")
    public void SetScoreboard(final Player player, ScoreboardType type) {
        if(type == ScoreboardType.LOBBY) {
            Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(Plugin.core, new Runnable() {
                public void run() {
                    ScoreboardManager sbManager = Bukkit.getServer().getScoreboardManager();
                    Lscoreboard = sbManager.getNewScoreboard();
                 
                    if(Lobj == null) {
                        Lobj = Lscoreboard.registerNewObjective("sb", "dummy");
                        Lobj.setDisplayName(ChatColor.YELLOW + "" + ChatColor.BOLD + "ArcticMC");
                        Lobj.setDisplaySlot(DisplaySlot.SIDEBAR);
                    } else {
                        Lobj = Lscoreboard.getObjective("sb");
                    }
                 
                    Lscoreboard.resetScores(player);
                 
                    File file = new File(Plugin.core.getDataFolder(), "economy.yml");
                    YamlConfiguration fileConfig = null;
                    if(file.exists()) {
                        fileConfig = YamlConfiguration.loadConfiguration(file);
                    }
                 
                    if(fileConfig != null) {
                        if(!fileConfig.isSet("credits." + player.getName())) {
                            fileConfig.set("credits." + player.getName(), 0);
                            try {
                                fileConfig.save(file);
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                 
                    String rank = ChatColor.stripColor(player.getDisplayName().replace(player.getName(), ""));
                    if(rank.isEmpty()) {
                        rank = "Default";
                    }
                 
                    Lrank = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.WHITE + "Rank: " + ChatColor.GREEN + rank + "     "));
                 
                    if(file.exists()) {
                        if(fileConfig.isConfigurationSection("credits")) {
                            if(fileConfig.isSet("credits." + player.getName())) {
                                Lcredits = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.YELLOW + "Credits: " + ChatColor.GREEN + fileConfig.getInt("credits." + player.getName()) + "     "));
                            } else {
                                try {
                                    file.createNewFile();
                                } catch (IOException e) {
                                    e.printStackTrace();
                                }
                             
                                fileConfig = YamlConfiguration.loadConfiguration(file);
                                fileConfig.set("credits." + player.getName(), 0);
                                try {
                                    fileConfig.save(file);
                                } catch (IOException e) {
                                    e.printStackTrace();
                                }
                             
                                Lcredits = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.YELLOW + "Credits: " + ChatColor.GREEN + "0     "));
                            }
                        } else {
                            try {
                                file.createNewFile();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                         
                            fileConfig = YamlConfiguration.loadConfiguration(file);
                            fileConfig.set("credits." + player.getName(), 0);
                            try {
                                fileConfig.save(file);
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                         
                            Lcredits = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.YELLOW + "Credits: " + ChatColor.GREEN + "0     "));
                        }
                    } else {
                        try {
                            file.createNewFile();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                     
                        fileConfig = YamlConfiguration.loadConfiguration(file);
                        fileConfig.set("credits." + player.getName(), 0);
                        try {
                            fileConfig.save(file);
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                     
                        Lcredits = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.YELLOW + "Credits: " + ChatColor.GREEN + "0     "));
                    }
                 
                    for(Player players : Bukkit.getOnlinePlayers()) {
                        if(players.hasPermission("arcticmc.helper") || players.hasPermission("arcticmc.admin") || players.isOp()) {
                            totalStaff++;
                        }
                    }
                 
                    Lstaff = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.YELLOW + "Staff Online: " + ChatColor.GREEN + totalStaff + "     "));
                    Lwebsite = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.WHITE + "  www.ArcticMc.com"));
                 
                    Lempty1 = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(""));
                    Lempty2 = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(" "));
                    Lempty3 = Lobj.getScore(Bukkit.getServer().getOfflinePlayer("  "));
                 
                    Lrank.setScore(6);
                    Lempty1.setScore(5);
                    Lcredits.setScore(4);
                    Lempty2.setScore(3);
                    Lstaff.setScore(2);
                    Lempty3.setScore(1);
                    Lwebsite.setScore(0);
                 
                    player.setScoreboard(Lscoreboard);
                 
                    totalStaff = 0;
                }
            }, 1);
        }
        if(type == ScoreboardType.SG) {
            Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(Plugin.core, new Runnable() {
                public void run() {
                    ScoreboardManager sbManager = Bukkit.getServer().getScoreboardManager();
                    SGscoreboard = sbManager.getNewScoreboard();
                 
                    if(SGobj == null) {
                        SGobj = SGscoreboard.registerNewObjective("sg", "dummy");
                        SGobj.setDisplayName(ChatColor.YELLOW + "" + ChatColor.BOLD + "SurvivalGames");
                        SGobj.setDisplaySlot(DisplaySlot.SIDEBAR);
                    } else {
                        SGobj = SGscoreboard.getObjective("sg");
                    }
                 
                    SGscoreboard.resetScores(player);
                 
                    Files files = new Files();
                    YamlConfiguration arenaFile = YamlConfiguration.loadConfiguration(files.SGArenas);
                 
                    Set<String> keys = arenaFile.getKeys(false);
                    keys.remove("null");
                 
                    for(String arenaList : keys) {
                        SGtotalPlayers.put(arenaList, arenaFile.getInt(arenaList + ".data.PLAYER_COUNT"));
                    }
                 
                    for(String arenaList : arenaFile.getKeys(false)) {
                        SGplayers = SGobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.YELLOW + "Players: " + ChatColor.GREEN + SGtotalPlayers.get(arenaList) + "     "));
                    }
                    SGclass = SGobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.YELLOW + "Class: " + ChatColor.GREEN + Core.sgManager.getClass(player) + "     "));
                 
                    time = 600;
                    SGtime = SGobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.YELLOW + "Time: " + ChatColor.GREEN + time + "     "));
                 
                    SGwebsite = SGobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.WHITE + "  www.ArcticMc.com"));
                 
                    SGempty1 = SGobj.getScore(Bukkit.getServer().getOfflinePlayer(""));
                    SGempty2 = SGobj.getScore(Bukkit.getServer().getOfflinePlayer(" "));
                    SGempty3 = SGobj.getScore(Bukkit.getServer().getOfflinePlayer("  "));
                 
                    SGplayers.setScore(6);
                    SGempty1.setScore(5);
                    SGclass.setScore(4);
                    SGempty2.setScore(3);
                    SGtime.setScore(2);
                    SGempty3.setScore(1);
                    SGwebsite.setScore(0);
                 
                    player.setScoreboard(SGscoreboard);
                }
            }, 1);
        }
    }
}

Please help me

Line 93 and 205 are giving the NullPointerException

 

@CheesyFreezy Do you mind pointing out those lines for me?

 

Line 93

Line 205

Edit: Dude, you're using getOfflinePlayer. Of course there will be NPEs

 

So what should i use?

 

I remember running into this with another developer. Actually use the string itself.
Otherwise, there's another method that I don't remember correctly

 

The error still appears

 

Are you sure there is a player that connected to your server called "Rank:"? By getting an offline player, you are getting their player name.

 

The 'Rank' is a fake playername. To add that to a scoreboard (in vanilla), you have to add that fake player to the scoreboard and add points. However, there isn't exactly a player called 'Rank: ' in his server, which is why he is using getOfflinePlayer

 

@Neonix getOfflinePlayer returns the player that Has connected to the server. If the string is not of a player that was on the server, then it returns null!

 

@Zombie_Striker getOfflinePlayer never returns a null value.

 

@Neonix @Zombie_Striker @teej107
So getOffLinePlayer is not the problem. But what's returning null?

 

Could lobJ or Sgobj be null? Do you set it to anything?

 

http://bukkit.org/threads/how-to-re...ubleshoot-your-own-plugins-by-yourself.32457/

 

@teej107 that didn't help. I send a message to console and player with all the variables but none of them are returning null. It's really annoying coding like this, because whenever another error(1) appears, my console is being spammed with this error(2), and i can't find a solution for the error(1).

EDIT: Now the error is not saying 'NullPointerException' but 'java.lang.IllegalArgumentException: OfflinePlayer cannot be null' Maybe this can help?

 

you're doing something which makes it null....
have you added a score to the players and rank?
Actually,
Lrank = Lobj.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.WHITE + "Rank: " + ChatColor.GREEN + rank + " "));
You're getting the rank: and the rank itself? Shouldn't you only get rank
Lrank = Lobj.getScore(Bukkit.getServer().getOfflinePlayer("rank"));

 

@Neonix, go to line 90. rank is just a string variable. I debugged it and it's not returning null

 

@CheesyFreezy What about Lobj? Is that null?

 

@nverdier no variables are null. That's why i don't get why it's a NullPointerException

 

Your stacktrace says otherwise. Now who are you going to believe? The program or yourself?
It would be a lot easier to read your code if you followed the Java naming conventions. Put in debug code and print out which variables are null or not.

Code:

System.out.println("thisField: " + (thisField != null));

 

All are not returning null. There are returning like they have to

 

@CheesyFreezy Well you obviously missed one. Please post the code you used to check it.