public class cmd_gamemode implements CommandExecutor {
    @SuppressWarnings("deprecation")

    @Override
    public boolean onCommand(CommandSender commandSender, Command command, String s, String[] args) {
        if(commandSender instanceof Player){
            Player player = (Player) commandSender;
            if(player.hasPermission("kartoffel.gm")){
                if(args.length == 0){
                    player.sendMessage(Main.prefix + "§cBenutze /gm [1-3] ");
                }
            }

        }
        return true;
    }
}