Cards not tracked

[gruaig]

I noticed everytime you deal it's local randomCard = math.random(1,52)

Keep the available card (or card indexes) in a list. Then remove a random card (or index) like this:

Random random = new Random();
List deck = new ArrayList<>();
// ...
int randomIndex = random.nextInt(deck.size());
Card nextCard = deck.remove(randomIndex);

Possibly add more decks and a shuffle function. Because currently, it doesn't seem fair. Also without being able to double and split