Please Help, I can't work out why this doesn't work.

I want to make a plugin that will make a player explode when they type /boom
Code: http://pastebin.com/pWaqwE4s
Error: http://pastebin.com/KGWR5kaZ

If anyone knows why this is happening, please help me out.
I assume its just a rookie mistake.
Thanks.

 

You are getting an array out of bounds exception on line 20.

Code:

Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
      at me.nique.plugins.cvsboom.Cvsboom.onCommand(Cvsboom.java:20)

This is caused by you trying to read the first argument when then there ist'n one.
A simple if statement would fix this.

Code:

Player target = null;
if(cmd.getName().equalsIgnoreCase("boom")){
                float explosionPower = 9F;
if(args.length >= 1){
    Player target = sender.getServer().getPlayer(args[0]);
}else if(sender instanceof Player){
    target = (Player) sender;//target the player sending the command
}else{
    //the console sent this
}         
target.getWorld().createExplosion(target.getLocation(), explosionPower);
target.setHealth(0);
            }

i would recommend learning to read stack traces, so you can fix stuff like this by yourself.

 

Thanks, I'm still trying to get a grasp on Java, but I'll look into it, since it will make learning easier if I know what I am doing wrong.