Solved NullPointerException?

Basically, I'm trying to load a plugin I made. But whenever I try to use a command I created, it says "An Internal Error Occured". It says there's something null on line 34. However I'm using the variables I've created on that line.

Code:

package me.cerlurs.potioncommands.main;

import java.util.logging.Logger;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

public class main extends JavaPlugin {
  
    public final Logger logger = Logger.getLogger("Minecraft");
  
    @Override
    public void onEnable() {
        Bukkit.getServer().getLogger().info("PotionCommands v1.0 has been enabled!");
        getConfig().options().copyDefaults(true);
        saveConfig();
    }
  
    @Override
    public void onDisable() {
        Bukkit.getServer().getLogger().info("PotionCommands v1.0 has been disabled!");
      
    }
  
    public boolean onCommand(CommandSender sender, Command cmd, String s, String[] args) {
        Player p = (Player) sender;
        String noperm = getConfig().getString("noperm");
        String nopermission = ChatColor.translateAlternateColorCodes('&', noperm);
        String nv = getConfig().getString("nightvision");
        String nightvision = ChatColor.translateAlternateColorCodes('&', nv);
      
        if(cmd.getName().equalsIgnoreCase("nv")) {
            if(p.hasPermission("potioncommands.nightvision")) {
                p.sendMessage(nightvision);
                p.addPotionEffect(new PotionEffect(PotionEffectType.NIGHT_VISION, 1728000, 1));
              
            }
            if(!(p.hasPermission("potioncommands.nightvision"))) {
                p.sendMessage(nopermission);
            }
        }
      
      
      
      
        return false;
      
    }

}

I'm not too experienced when it comes to coding, this is my first time trying to add a config file. I've probably made an obvious mistake but I just don't realize it.

Error Log (open) Error Log (close)

22.11 13:21:04 [Server] INFO ... 13 more
22.11 13:21:04 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at me.cerlurs.potioncommands.main.main.onCommand(main.java:34) ~[?:?]
22.11 13:21:04 [Server] INFO at org.bukkit.ChatColor.translateAlternateColorCodes(ChatColor.java:206) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO Caused by: java.lang.NullPointerException
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:734) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:186) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:880) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at net.minecraft.server.v1_7_R4.PlayerConnection.handleCommand(PlayerConnection.java:1043) [spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:767) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:21:04 [Server] INFO org.bukkit.command.CommandException: Unhandled exception executing command 'nv' in plugin PotionCommands v1.0
22.11 13:21:04 [Server] ERROR null
22.11 13:21:02 [Server] INFO Cerlurs >> Hey cutie
22.11 13:19:56 [Server] INFO ... 13 more
22.11 13:19:56 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at me.cerlurs.potioncommands.main.main.onCommand(main.java:34) ~[?:?]
22.11 13:19:56 [Server] INFO at org.bukkit.ChatColor.translateAlternateColorCodes(ChatColor.java:206) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO Caused by: java.lang.NullPointerException
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:734) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:186) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:880) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at net.minecraft.server.v1_7_R4.PlayerConnection.handleCommand(PlayerConnection.java:1043) [spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:767) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot_1649.jar:git-Spigot-1649]
22.11 13:19:56 [Server] INFO org.bukkit.command.CommandException: Unhandled exception executing command 'nv' in plugin PotionCommands v1.0

 

Use [code][/code] tags instead of using spoilers, far easier to read

 

Read this: http://www.oracle.com/technetwork/java/codeconventions-135099.html

STOP STEALING MINECRAFT'S LOGGER!

Bukkit already logs your plugins. You don't need this.

Because of Above, You can completely remove this.

DONT BLIND CAST

You're creating this instence for EACH AND EVERY command sent. This will take up memory space. Please create these instance once you know you're actually going to use them.

 

Can you please show us your config.yml?

 

@mcdorli
noperm: '&c&lPotion Commands &8> &7&lYou do not have permission to do that!'
nightvision: '&c&lPotion Commands &8> &7&lYou have enabled Night Vision!'

 

Instead of doing another useless check, just use "ELSE"

22.11 13:19:56 [Server] INFO at me.cerlurs.potioncommands.main.main.onCommand(main.java:34) ~[?:?]
This is the line that is causing the error. What is this line?

 

@Zombie_Striker String nopermission = ChatColor.translateAlternateColorCodes('&', noperm);

 

noperm is somehow null

 

@mcdorli I know this, but I'm using it. So I can't figure out how it's null.

 

make a picture of the config.yml file and post it here

 

@mcdorli

 

Did you enabled, so you use the messages.yml file instead of the basic config.yml file?

 

@mcdorli I don't believe so. How do I do that?

 

If you do not know how to do it you should just stick to the default config.yml until you figure it out.

 

I reccomend just renaming the config to config.yml if you don' have it already. But if you don't want to, then simply FileConfiguration config = YamlConfiguration.loadConfiguration(<your file here>);
then use config.set()

 

@Xerox262 Fair enough
@mcdorli I'll just rename it

@mcdorli Thanks for all your help, changing the name ended up fixing the issue

EDIT by Moderator: merged posts, please use the edit button instead of double posting.