Internal errors after calling a command without args[]

Hey guys, another question

I have a small problem. In my plugin, I use 2 commands, "/ibooks" and "/ibooks create". The last one works, but the first one, without any things in args[] doesn't work.

Code:

    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
        Player player = (Player)sender;

        if (cmd.getName().equalsIgnoreCase("ibooks") && player != null) {
            if(args[0].equalsIgnoreCase("create"))
            {
                player.sendMessage("Right-click on a bookshelf to create a book.");
                mode.put(player, 1);
            }
            else if(args[0].isEmpty())
            {
                 player.sendMessage("Welcome to iBooks");
            }
        }
        return true;
    }
    

Thanks for every help

 

I'm pretty sure. That for just regular ibooks you should check if the args are null, so

Code:

Else if(args == null){
    Player.sendmessage("welcome to ibooks")
}

(As for any syntax errors that was sent from my phone so fix them yourself lol )