Gathering Integers from a Command.

Basically, I have no idea how to do this> Later in the code, I want to do something like, "If the amount typed in the command is more than the amount in the inventory, then return ("You don't have enough ____ for this!").

The /mclgive command format will be: /mclgive (iron) (gold) (diamonds) in that order, and I want to assign the values given to Integers, but I'm completely at a loss of how to do so. Sorry for complete java noobiness.

Code:

    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args){
        Player player = (Player) sender;
        if(commandLabel.equalsIgnoreCase("mclottery")){
            player.sendMessage("This plugin is a Lottery for minecraft!");
            player.sendMessage("The Pot for the next lottery is: " +IronDeposited+ " Iron, " +GoldDeposited+ " Gold, and " +DiamondsDeposited+ " Diamonds.");
            player.sendMessage("To Deposit into the Lottery for a chance to win it all: /mclgive #Iron #Gold #Diamonds");
        }
        if(commandLabel.equalsIgnoreCase("mclgive")){
            if(args.length == 3){
                if(player.isOp()){
                    player.sendMessage("Bro, you're too sexy for this.");
                }
                PlayerInventory inv = player.getInventory();
                ItemStack iron = new ItemStack(Material.IRON_INGOT);
                ItemStack gold = new ItemStack(Material.GOLD_INGOT);
                ItemStack diamond = new ItemStack(Material.DIAMOND);
                if(inv.contains(Material.IRON_INGOT)){
                   
                }
            }else{
                player.sendMessage("You used an incorrect format for the command! Please review the Command Usage!");
            }
        }
        return false;
    }

For assigning values to the integers just

int whatever = args[position];

make sure you check if the args are integers otherwise you will end up with errors if they're not.

Thank you so much!

EDIT: Now i'm lost on how to keep the data of "Player XYZ has deposited X iron, Y gold, and Z diamonds into the lottery". Also, I don't even know how to keep the total iron deposited variable up to date... Sorry once again >_>