Problem/Bug Configuration ERROR

I have a NullPointerExpection error. I tried to read something from the config file but i got this error.

Code:

package hu.czarmin.survivalboost.Handlers;


import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.ArmorStand;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.inventory.ItemStack;
import org.bukkit.scheduler.BukkitScheduler;

import hu.czarmin.survivalboost.main;

public class PetMotionHandler implements Listener {
   
    private static Location loc;
   
    public static void start(main pl) {
        @SuppressWarnings("deprecation")
        Player p = Bukkit.getPlayer("czarmin");
        FileConfiguration cfg = main.cfg(pl);
        p.sendMessage("1");
        if(cfg.getConfigurationSection("CustomPets").getKeys(false) == null) { // <--- There is the problem
            p.sendMessage("null");
        } else {
            p.sendMessage("everything");
        }
        BukkitScheduler scheduler = Bukkit.getServer().getScheduler();
        p.sendMessage("2");
        scheduler.scheduleSyncRepeatingTask(pl, new Runnable() {
            @Override
            public void run() {
                p.sendMessage("3");
                for(String section : cfg.getConfigurationSection("CustomPets").getKeys(false)) {
                    p.sendMessage("4");
                    String name = ChatColor.translateAlternateColorCodes('&', cfg.getString("CustomPets." + section + ".getName"));
                    p.sendMessage("5");
                    p.sendMessage(name);
                    ArmorStand petAS = (ArmorStand) findCustomPet(name, p);
                    p.sendMessage("6");
                    Entity pet = findCustomPet(name + "|Custom_pet|", p);
                    p.sendMessage("7");
                    for(Player p : Bukkit.getOnlinePlayers()) {
                        p.sendMessage(petAS.getCustomName());
                        p.sendMessage(pet.getCustomName());
                    }
                    petAS.teleport(pet.getLocation());
                    if(loc != pet.getLocation()) {
                        ItemStack item = new ItemStack(Material.DIAMOND_PICKAXE, 1);
                        item.setDurability((short) (cfg.getInt("CustomPets." + section + ".getModel") + 1));
                        petAS.setHelmet(item);
                    } else {
                        ItemStack item = new ItemStack(Material.DIAMOND_PICKAXE, 1);
                        item.setDurability((short) (cfg.getInt("CustomPets." + section + ".getModel")));
                        petAS.setHelmet(item);
                    }
                }
            }
        }, 0L, 5L);
    }
   
    private static Entity findCustomPet(String name, Player player) {
        for(World world : Bukkit.getWorlds()) {
            player.sendMessage("/1");
            for(Entity mob : world.getEntities()) {
                player.sendMessage("/2");
                if(mob.getCustomName().equals(name)) {
                    player.sendMessage("/3");
                    return mob;
                } else {
                    player.sendMessage("/4");
                    return null;
                }
            }
        }
        player.sendMessage("/5");
        return null;
    }
   
}

The config file:

Code:

CustomPets:
  PandaTest:
    getType: !!org.bukkit.entity.EntityType 'WOLF'
    getModel: 1
    getName: '&aPandaTest'

Error:

Code:

[12:01:15 ERROR]: Error occurred while enabling SurvivalBoost v0.1 (Is it up to date?)
java.lang.NullPointerException
        at hu.czarmin.survivalboost.Handlers.PetMotionHandler.start(PetMotionHandler.java:28) ~[?:?]
        at hu.czarmin.survivalboost.main.onEnable(main.java:33) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:271) ~[craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:329) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at org.bukkit.craftbukkit.v1_11_R1.CraftServer.enablePlugin(CraftServer.java:361) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at org.bukkit.craftbukkit.v1_11_R1.CraftServer.enablePlugins(CraftServer.java:323) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at org.bukkit.craftbukkit.v1_11_R1.CraftServer.reload(CraftServer.java:729) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at org.bukkit.Bukkit.reload(Bukkit.java:549) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at hu.czarmin.survivalboost.commands.update.onCommand(update.java:37) [update.jar:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at org.bukkit.craftbukkit.v1_11_R1.CraftServer.dispatchCommand(CraftServer.java:629) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at net.minecraft.server.v1_11_R1.PlayerConnection.handleCommand(PlayerConnection.java:1294) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:1154) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at net.minecraft.server.v1_11_R1.PacketPlayInChat.a(SourceFile:37) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at net.minecraft.server.v1_11_R1.PacketPlayInChat.a(SourceFile:9) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_121]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_121]
        at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:695) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:360) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:650) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:554) [craftbukkit-1.11.2.jar:git-Bukkit-1f6c04c]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]

 

Have you got:
@Override
public void onEnable() {
}

 

@CopyPaste

Code:java

if(cfg.getConfigurationSection("CustomPets").getKeys(false) == null) { // <--- There is the problem

The problem is that you're for some reason invoking getKeys(false) on the configuration section. If the configuration section doesn't exist, getConfigurationSection() will already return null. No need for the getKeys() call.

 

I think the problem is the config loading. There is my main class:

Code:

package hu.czarmin.survivalboost;

import java.io.File;
import java.util.logging.Logger;

import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.plugin.PluginDescriptionFile;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

import hu.czarmin.survivalboost.Handlers.PetMotionHandler;
import hu.czarmin.survivalboost.Handlers.SpawnPet;
import hu.czarmin.survivalboost.commands.update;
import hu.czarmin.survivalboost.listeners.CustomCraftings;
import hu.czarmin.survivalboost.listeners.CustomEffects;
import hu.czarmin.survivalboost.listeners.CustomPetSpawn;
import hu.czarmin.survivalboost.listeners.CustomXP;
import hu.czarmin.survivalboost.listeners.DetectCosmetic;

public class main extends JavaPlugin {
  
    public void onEnable() {
        PluginDescriptionFile pdfFile = getDescription();
        Logger logger = getLogger();
      
        CustomCraftings.loadRecipes();
        registerCommands();
        registerEvents();
        configManager();
      
        logger.info(pdfFile.getName() + " has been enabled! (V." + pdfFile.getVersion() + ")");
      
        PetMotionHandler.start(this);
    }
  
    public void onDisable() {
        PluginDescriptionFile pdfFile = getDescription();
        Logger logger = getLogger();
      
        logger.info(pdfFile.getName() + " has been disabled! (V." + pdfFile.getVersion() + ")");
        getServer().getScheduler().cancelTask(PetMotionHandler.schedulerpet);
    }
  
    public void registerCommands() {
        getCommand("updateplugin").setExecutor(new update());
    }
  
    public void registerEvents() {
        PluginManager pm = getServer().getPluginManager();
      
        pm.registerEvents(new DetectCosmetic(), this);
        pm.registerEvents(new CustomEffects(), this);
        pm.registerEvents(new CustomXP(), this);
        pm.registerEvents(new SpawnPet(this), this);
        pm.registerEvents(new CustomPetSpawn(this), this);
    }
  
    public void serverConfigReload() {
        reloadConfig();
    }
  
    public void configManager() {
        File config = new File(getDataFolder(), "config.yml");
        if(!config.exists()) {
            getConfig().options().copyDefaults(true);
            saveDefaultConfig();
        }
    }
  
    public static FileConfiguration cfg(main plugin) {
        return plugin.getConfig();
    }
}

and thanks for helping me! A big thanks for everyone.