import java.util.ArrayList; import java.util.Collections; public class Blackjack { public static void main(String[] args) { // number of games int playCount = 100; Game game = new Game(); int wins = 0; for (int i = 0; i < playCount; i++) { if (game.playGame()) { wins++; } } System.out.println("You got " + wins + " blackjacks"); } } public class Game { Deck deck = new Deck(); int size = 52; int result; Card card; ArrayList hand; int acesInHand; public boolean playGame() { boolean isBlackJack = false; acesInHand = 0; deck.shuffle(); int cardNumber = 0; result = deck.getCard(cardNumber).getCount(); hand = new ArrayList<>(); while (result < 21) { cardNumber++; if (deck.getCards().get(cardNumber).getSecondCount() > 0) { acesInHand++; } hand.add(deck.getCards().get(cardNumber)); result = calculateResult(hand); } if (result == 21) { isBlackJack = true; } return isBlackJack; } public int calculateResult(ArrayList cards) { int sum = 0; for (int j = acesInHand; j >= 0; j--) { sum = 0; for (int i = 0; i < cards.size(); i++) { int smallAcesInHand = acesInHand; if (cards.get(i).getSecondCount() > 0 && smallAcesInHand > 0) { sum = sum + cards.get(i).getSecondCount(); smallAcesInHand--; } else { sum = sum + cards.get(i).getCount(); } } if (sum == 21) { return sum; } } return sum; } } public class Card { int secondCount = -1; int count; String name; int[] counts = {11, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 11}; String[] names = {"Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King"}; public Card(int num) { this.name = names[num]; this.count = counts[num]; } public Card(int num1, int num2) { this.name = names[num1]; this.count = counts[num1]; this.secondCount = counts[num2]; } public String getName() { return name; } public int getCount() { return count; } public int getSecondCount() { return secondCount; } } public class Deck { ArrayList cards; Deck() { cards = new ArrayList<>(); for (short a = 0; a <= 3; a++) { for (short b = 0; b <= 12; b++) { if (b == 0) { cards.add(new Card(b, 13)); } else { cards.add(new Card(b)); } } } } public void shuffle() { Collections.shuffle(cards); } public ArrayList getCards() { return cards; } public Card getCard(int i) { return cards.get(i); } }

A Blackjack Game