{Help} Using arguments with words!

I want to add a arguments for a plugin that i need really bad, its for a plugin that im making and ik it sounds funny but i havnt made a plugin in a while,

Example, if someone do a command that is like /areana create [name]
and you dont want the play to have the name no longer than 10 characters how can you stop that?
And get a command back that says "your arena name cannot be longer than 10 characters, please make it shorter

And if someone would like to be a coding buddy with me because i make private plugins, add me on skype: mactown51

 

if (args[1].length() > 10) {
sender.sendMessage("No more than 10 characters!")
}

 

And what is that, since i have the arg, how to block it so they cant continue using it, like the have the command as /arena create {Name} and if they make the arena name to long then it wont create?

if(args.length == 2){


if(args[0].equalsIgnoreCase("create")){
Arena arena = new Arena(args[1], this);
getConfig().addDefault("Arenas." + arena.getName(), args[1]);
getConfig().addDefault("Arenas." + arena.getName() + ".Counter", 0);
getConfig().addDefault("Arenas." + arena.getName() + ".Signs.Counter", 0);
actualConfig.addDefault(arena.getName() + ".MaxPlayers", 8);
actualConfig.addDefault(arena.getName() + ".AutoStartPlayers", 3);
actualConfig.addDefault(arena.getName() + ".Countdown", 30);
actualConfig.addDefault(arena.getName() + ".KillsToEnd", 25);
actualConfig.addDefault(arena.getName() + ".Type", "Kills");
actualConfig.addDefault(arena.getName() + ".Lives", "5");

m.saveYamls();
if(getConfig().contains("Arenas.List")){
List<String> list = getConfig().getStringList("Arenas.List");
list.add(arena.getName());
getConfig().set("Arenas.List", list);

 

mactown21
Add this

Code:

if (args[1].length() > 10) return true;

under this

Code:

if(args[0].equalsIgnoreCase("create")){

 

but how do i stop them from using the command, even if i do add this it will say that the arena is created, and then says that the arena name cannot be longer than 9 characters!

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