Solved Adding item quantity to a command

Hello, I have been trying to make a /head <player> <quantity> command, and I got it to work. My problem is that I want to see how can I avoid getting errors if players write a word where quantity is supposed to go. i.e. /head Kait18 hi
here is part of my onCommand:

Code:java

else if(cmd.getName().equalsIgnoreCase("head")){                   
                    if(Sender instanceof Player){
                        if(Sender.hasPermission("ecore.heads")){
                        if(args.length == 0){
                            Sender.sendMessage(getConfig().getString("Prefix").replace("&", "§") + "§3usage: /head <player> <amount>");
                        }if(args.length == 1){
                            Sender.sendMessage(getConfig().getString("Prefix").replace("&", "§") + "§3usage: /head <player> <amount>");
                        }if(args.length == 2){
                            Player player = (Player) Sender;
                            int id = Integer.parseInt( args[1] );
                            ItemStack head = new ItemStack(Material.SKULL_ITEM, id, (short) 3);
                            ItemMeta navMeta = head.getItemMeta();
                            navMeta.setDisplayName("§3" + args[0] + "'s head");
                            head.setItemMeta(navMeta);
                            SkullMeta skull = (SkullMeta) head.getItemMeta();
                            skull.setOwner(args[0]);
                            head.setItemMeta(skull);
                            player.getInventory().addItem(new ItemStack(head));
                            player.sendMessage(getConfig().getString("Prefix").replace("&", "§") + "§3You have been given " + args[0] + "§3's head.");
                        }
                    }else{
                        Sender.sendMessage(getConfig().getString("Prefix").replace("&", "§") + getConfig().getString("noperm").replace("&", "§"));
                    }
                    }else{
                        Sender.sendMessage("§bconsole usage: /head <player> <amount> <target>");
                    }if(args.length == 3){
                        if(Sender.hasPermission("ecore.heads.others")){
                        Player target = Bukkit.getPlayer(args[2]);                       
                        if(target == null){
                            Sender.sendMessage(getConfig().getString("Prefix").replace("&", "§") + ChatColor.RED + "Player not found.");
                        }else{
                        int id = Integer.parseInt( args[1] );
                        ItemStack head = new ItemStack(Material.SKULL_ITEM, id, (short) 3);
                        ItemMeta navMeta = head.getItemMeta();
                        navMeta.setDisplayName("§3" + args[0] + "'s head");
                        head.setItemMeta(navMeta);
                        SkullMeta skull = (SkullMeta) head.getItemMeta();
                        skull.setOwner(args[0]);
                        head.setItemMeta(skull);
                        target.getInventory().addItem(new ItemStack(head));
                        target.sendMessage(getConfig().getString("Prefix").replace("&", "§") + "§3You have been given " + args[0] + "§3's head.");
                        Sender.sendMessage(getConfig().getString("Prefix").replace("&", "§") + "§3You gave " + args[1] + " " + args[0] + "§3's head.");
                    }
                    }else{
                        Sender.sendMessage(getConfig().getString("Prefix").replace("&", "§") + getConfig().getString("noperm").replace("&", "§"));
                    }
                    }
                }

Is there any way to prevent this error? Thanks for the help

 

random_username
I'm assuming the quantity is the 'id' variable. Anyways, this is how you should do it

Code:java

int id = 0;
 
try {
    id = Integer.parseInt(args[1]);
} catch(NumberFormatException ex) {
    player.sendMessage("args[1] must be a number!");
    return true; // return something so the code doesn't continue
}

 

Thanks so much!