TestBlackJack.txt

//Padraig Kennedy, 13204999 , Assignment 2
package blackjack;
import java.util.Scanner;
import java.util.Vector;

	
	public class BlackJack
	{

	    private static Scanner scanner = new Scanner(System.in);
	    private int[] deck;   // An array of 52 Cards, representing the deck.
	    private int currentPosition; // Current position in the deck
	    private Vector hand;   // The cards in the hand.

	    public static void main(String[] args)
	    {
	        new BlackJack().run();
	    }

	    public void run()
	    {

	        /*
	        This program lets the user play Blackjack.  The computer
	        acts as the dealer.  The user has a stake of €100, and
	        makes a bet on each game.  The user can leave at any time,
	        or will be kicked out when he loses all the money.
	        House rules:  The dealer hits on a total of 16 or less
	        and stands on a total of 17 or more.  Dealer wins ties.
	        A new deck of cards is used for each game.
	         */

	        int money;          // Amount of money the user has.
	        int bet;            // Amount user bets on a game.
	        boolean userWins;   // Did the user win the game?

	        System.out.println("Welcome User to the game of blackjack.");
	        System.out.println();

	        money = 100;  // User starts with $100.

	        while (true)
	        {
	            System.out.println("You have " + money + " euros.");
	            do
	            {
	                System.out.println("How many euros do you want to bet min. bet €5 - max. bet €25?  (Enter 0 to leave game.)");
	                bet = scanner.nextInt();
	                if (bet < 0 || bet > money)
	                {
	                    System.out.println("Your answer must be between 0 and " + money + '.');
	                }
	            } while (bet < 0 || bet > money);
	            if (bet == 0)
	            {
	                break;
	            }
	            userWins = setupNewGame();
	            if (userWins)
	            {
	                money = money + bet;
	            } else
	            {
	                money = money - bet;
	            }
	            System.out.println();
	            if (money == 0)
	            {
	                System.out.println("Looks like you're out of money!");
	                break;
	            }
	        }

	        System.out.println();
	        System.out.println("You leave with €" + money + '.');

	    } // end main()

	    private boolean setupNewGame()
	    {
	        // Let the user play one game of Blackjack.
	        // Return true if the user wins, false if the user loses.

	        Vector dealerHand;   // The dealer's hand.
	        Vector userHand;     // The user's hand.

	        // Create an unshuffled deck of cards.
	        deck = new int[52];
	        int cardCt = 0; // How many cards have been created so far.
	        for (int suit = 0; suit <= 3; suit++)
	        {
	            for (int value = 1; value <= 13; value++)
	            {
	                deck[cardCt] = value;
	                cardCt++;
	            }
	        }
	        currentPosition = 0;

	        dealerHand = new Vector();
	        userHand = new Vector();

	        /*  Shuffle the deck, then deal two cards to each player. */

	        shuffle();

	        dealerHand.addElement(dealCard());
	        dealerHand.addElement(dealCard());
	        userHand.addElement(dealCard());
	        userHand.addElement(dealCard());

	        System.out.println();
	        System.out.println();

	        /* Check if one of the players has Blackjack (two cards totaling to 21).
	        The player with Blackjack wins the game.  Dealer wins ties.
	         */

	        if (value(dealerHand) == 21)
	        {
	            System.out.println("Dealer has the " + showCard(getCard(dealerHand, 0)) + " and the " + showCard(getCard(dealerHand, 1)) + ".");
	            System.out.println("User has the " + showCard(getCard(userHand, 0)) + " and the " + showCard(getCard(userHand, 1)) + ".");
	            System.out.println();
	            System.out.println("Dealer has Blackjack.  Dealer wins.");
	            return false;
	        }

	        if (value(userHand) == 21)
	        {
	            System.out.println("Dealer has the " + showCard(getCard(dealerHand, 0)) + " and the " + showCard(getCard(dealerHand, 1)) + ".");
	            System.out.println("User has the " + showCard(getCard(userHand, 0)) + " and the " + showCard(getCard(userHand, 1)) + ".");
	            System.out.println();
	            System.out.println("You have Blackjack.  You win.");
	            return true;
	        }

	        /*  If neither player has Blackjack, play the game.  The user gets a chance
	        to draw cards (i.e., to "Hit").  The while loop ends when the user
	        chooses to "Stand" or when the user goes over 21.
	         */

	        while (true)
	        {

	            /* Display user's cards, and let user decide to Hit or Stand. */

	            System.out.println();
	            System.out.println();
	            System.out.println("Your cards are:");
	            for (int i = 0; i < userHand.size(); i++)
	            {
	                System.out.println("    " + showCard(getCard(userHand, i)));
	            }
	            System.out.println("Your total is " + value(userHand));
	            System.out.println();
	            System.out.println("Dealer is showing the " + showCard(getCard(dealerHand, 0)));
	            System.out.println();
	            System.out.print("Hit (H) or Stand (S)? ");
	            char userAction;  // User's response, 'H' or 'S'.
	            do
	            {
	                userAction = Character.toUpperCase(scanner.next().charAt(0));
	                if (userAction != 'H' && userAction != 'S')
	                {
	                    System.out.print("Please respond H or S:  ");
	                }
	            } while (userAction != 'H' && userAction != 'S');

	            /* If the user Hits, the user gets a card.  If the user Stands, the
	            dealer gets a chance to draw and the game ends.
	             */

	            if (userAction == 'S')
	            {
	                // Loop ends; user is done taking cards.
	                break;
	            } else
	            {  // userAction is 'H'.
	                // Give the user a card.  If the user goes over 21, the user loses.
	                int newCard = dealCard();
	                userHand.addElement(newCard);
	                System.out.println();
	                System.out.println("User hits.");
	                System.out.println("Your card is the " + showCard(newCard));
	                System.out.println("Your total is now " + value(userHand));
	                if (value(userHand) > 21)
	                {
	                    System.out.println();
	                    System.out.println("You busted by going over 21.  You lose.");
	                    System.out.println("Dealer's other card was the " + showCard(getCard(dealerHand, 1)));
	                    return false;
	                }
	            }

	        } // end while loop

	        /* If we get to this point, the user has Stood with 21 or less.  Now, it's
	        the dealer's chance to draw.  Dealer draws cards until the dealer's total is > 16.
	         */

	        System.out.println();
	        System.out.println("User stands.");
	        System.out.println("Dealer's cards are");
	        System.out.println("    " + showCard(getCard(dealerHand, 0)));
	        System.out.println("    " + showCard(getCard(dealerHand, 1)));
	        while (value(dealerHand) <= 16)
	        {
	            int newCard = dealCard();
	            System.out.println("Dealer hits and gets the " + showCard(newCard));
	            dealerHand.addElement(newCard);
	        }
	        System.out.println("Dealer's total is " + value(dealerHand));

	        /* Now, the winner can be declared. */

	        System.out.println();
	        if (value(dealerHand) > 21)
	        {
	            System.out.println("Dealer busted by going over 21.  You win.");
	            return true;
	        } else
	        {
	            if (value(dealerHand) == value(userHand))
	            {
	                System.out.println("Dealer wins on a tie.  You lose.");
	                return false;
	            } else
	            {
	                if (value(dealerHand) > value(userHand))
	                {
	                    System.out.println("Dealer wins, " + value(dealerHand) + " points to " + value(userHand) + ".");
	                    return false;
	                } else
	                {
	                    System.out.println("You win, " + value(userHand) + " points to " + value(dealerHand) + ".");
	                    return true;
	                }
	            }
	        }

	    }  // end playBlackjack()

	    public int dealCard()
	    {
	        // Deals one card from the deck and returns it.
	        if (currentPosition == 52)
	        {
	            shuffle();
	        }
	        currentPosition++;
	        return deck[currentPosition - 1];
	    }

	    public void shuffle()
	    {
	        // Put all the used cards back into the deck, and shuffle it into
	        // a random order.
	        for (int i = 51; i > 0; i--)
	        {
	            int rand = (int) (Math.random() * (i + 1));
	            int temp = deck[i];
	            deck[i] = deck[rand];
	            deck[rand] = temp;
	        }
	        currentPosition = 0;
	    }

	    public int getCard(Vector hand, int position)
	    {
	        // Get the card from the hand in given position, where positions
	        // are numbered starting from 0.  If the specified position is
	        // not the position number of a card in the hand, then null
	        // is returned.
	        if (position >= 0 && position < hand.size())
	        {
	            return ((Integer)hand.elementAt(position)).intValue();
	        } else
	        {
	            return 0;
	        }
	    }

	    public int value(Vector hand)
	    {
	        // Returns the value of this hand for the
	        // game of Blackjack.

	        int val;      // The value computed for the hand.
	        boolean ace;  // This will be set to true if the
	        //   hand contains an ace.
	        int cards;    // Number of cards in the hand.

	        val = 0;
	        ace = false;
	        cards = hand.size();

	        for (int i = 0; i < cards; i++)
	        {
	            // Add the value of the i-th card in the hand.
	            int card;    // The i-th card;
	            int cardVal;  // The blackjack value of the i-th card.
	            card = getCard(hand, i);
	            cardVal = getCardValue(card);  // The normal value, 1 to 13.
	            if (cardVal > 10)
	            {
	                cardVal = 10;   // For a Jack, Queen, or King.
	            }
	            if (cardVal == 1)
	            {
	                ace = true;     // There is at least one ace.
	            }
	            val = val + cardVal;
	        }

	        // Now, val is the value of the hand, counting any ace as 1.
	        // If there is an ace, and if changing its value from 1 to
	        // 11 would leave the score less than or equal to 21,
	        // then do so by adding the extra 10 points to val.

	        if (ace == true && val + 10 <= 21)
	        {
	            val = val + 10;
	        }

	        return val;

	    }
	    public int getCardValue(int card)
	    {
	        int result = card;
	        switch (card)
	        {
	            case 11:
	            case 12:
	            case 13:
	                result =  10;
	        }
	        return result;
	    }
	    public String showCard(int card)
	    {
	        switch (card)
	        {
	            case 1:
	                return "Ace";
	            case 2:
	                return "2";
	            case 3:
	                return "3";
	            case 4:
	                return "4";
	            case 5:
	                return "5";
	            case 6:
	                return "6";
	            case 7:
	                return "7";
	            case 8:
	                return "8";
	            case 9:
	                return "9";
	            case 10:
	                return "10";
	            case 11:
	                return "Jack";
	            case 12:
	                return "Queen";
	            case 13:
	                return "King";
	            default:
	                return "??";
	        }
	    }
	}  // end class