args problem

Hello,


I got a problem with this script:

Code:java

]
package Main;
 
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.event.Listener;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;
 
public class main extends JavaPlugin implements Listener{
 
    public void onEnable() {
        getConfig().options().copyDefaults(true);
        saveConfig();
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
        Bukkit.getServer().getScheduler().scheduleSyncRepeatingTask((Plugin) this, new Runnable() {
                public void run() {
                        for (Player p : Bukkit.getServer().getOnlinePlayers()) {
                            String l = p.getPlayerListName();
                            int lx = getConfig().getInt(l + ".exlevel");
                                String le = getConfig().getString(l + ".Level");
                                p.setCustomName(le);
                                p.setExp(lx);
 
                        }
                }
        }, 0, 20);
}
    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
        Player p = (Player) sender;
 
        if (!(sender instanceof Player)) {
            sender.sendMessage("You have to be online.");
            return true;
        }
        if (cmd.getName().equalsIgnoreCase("xs")) {
            if(args.length == 0){
                p.sendMessage(ChatColor.GREEN + "Use /xs help");
                return true;
            }if(args.equals("help")){
                p.sendMessage("todo");
                return true;
                }if(args[0].equals("add")){
                if(args[1].equals("level")){
                    if(Bukkit.getPlayer(args[2]).isOnline()){
                        if(isInt(args[3])){
                            String le = getConfig().getString(p + ".Level");
                            getConfig().set(le, le + args[2]);
                            return true;
                        }
                    }
                }
            }
 
 
        }
        return true;
    }
    public boolean isInt(String str) {
        try {
            Integer.parseInt(str);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }
    }
 
 
 

The error:

Code:

org.bukkit.command.CommandException: Unhandled exception executing command 'xs' in plugin Xpsystem v0.1
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1162) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:997) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_60]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_60]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:714) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_60]
Caused by: java.lang.IllegalArgumentException: Cannot set to an empty path
        at org.apache.commons.lang.Validate.notEmpty(Validate.java:321) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at org.bukkit.configuration.MemorySection.set(MemorySection.java:163) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        at Main.main.onCommand(main.java:50) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
        ... 15 more

Code:

name: Xpsystem
main: Main.main
version: 0.1
author: Magicdutchcraft
commands:
   xs:
      description: Xpsystemcommand
      usage: /<command>

Bart

 

@kingsofbart On line 50, you are trying to grab a string called "Level" that is under the player's name. Are you sure this string exists ? Where the error says "cannot set to an empty path" that is because the variable LE is null. Always implement checks on your code.

Code:

if(le == null) {
  getLogger().info("Couldn't grab the required string!  Aborting ... ");
  return false;
}

 

Thanks all, @_zircon_ ill add it right now!

 

Don't use

Code:

if (args.equals(/*string/*) {
//Stuff
}

Instead, use

Code:

if (args[/*argument number you want to check*/].equalsIgnoreCase(/*string*/)) {
//do stuff
}