Game.java

public class Game {

  static boolean play() {
 
      Deck deck;                  // A deck of cards.  A new deck for each game.
      Player computer;            // The computer.
      Player user;                // The user player.
      
      deck = new Deck();
      computer = new Player();
      user = new Player();
      
        /*  Shuffle the deck, then give two cards to each player. */
      deck.shuffle();
      (computer.getHand()).add(deck.take());
      (computer.getHand()).add(deck.take() );
      (user.getHand()).add( deck.take() );
      (user.getHand()).add( deck.take() );
      
      System.out.println();
      System.out.println();
      
      /* Check if one of the players has two cards totaling to 21.
         The player with 21 wins the game. Computer wins ties.
      */    
      if (computer.getHandTotal () == 21) {
           System.out.println("Computer has the " + computer.getCard(0)
                                   + " and the " + computer.getCard(1) + ".");
           System.out.println("User has the " + user.getCard(0)
                                     + " and the " + user.getCard(1) + ".");
           System.out.println();
           System.out.println("Computer wins.");
           return false;
      }
      
      if (user.getHandTotal () == 21) {
           System.out.println("Computer has the " + computer.getCard(0)
                                   + " and the " + computer.getCard(1) + ".");
           System.out.println("User has the " + user.getCard(0)
                                     + " and the " + user.getCard(1) + ".");
           System.out.println();
           System.out.println("You win.");
           return true;
      }
      
      /*  First the user gets a chance to draw cards ("Hit").  The while loop ends 
          when the user chooses to "Stand".  If the user goes over 21,
          the user looses.
      */
      
     while (true) {
          
           /* Display user's cards, and let user decide to Hit or Stand. */
           System.out.println();
           System.out.println("Your cards are:");
           for ( int i = 0; i < user.totalCards(); i++ )
              System.out.println("    " + user.getCard(i));
           System.out.println("Your total is " + user.getHandTotal ());
           System.out.println();
           System.out.println("Computer is showing the " + computer.getCard(0));
           System.out.println();
           System.out.print("Hit (H) or Stand (S)? ");
           char userAction;  // User's response, 'H' or 'S'.
           do {
              userAction = Character.toUpperCase( Keyboard.getlnChar() );
              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 loop ends (and it's the computer's turn to draw cards).
           */
           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 looses.
               Card newCard = deck.take();
               user.add(newCard);
               System.out.println();
               System.out.println("User hits.");
               System.out.println("Your card is the " + newCard);
               System.out.println("Your total is now " + user.getHandTotal ());
                 if (user.getHandTotal () > 21) {
                   System.out.println();
                   System.out.println("You went over 21, you loose.");
                   System.out.println("Computer's other card was the " 
                                                      + computer.getCard(1));
                   return false;  
               }
           }
           
      } 
      
      /* If we get to this point, the user has Stood with 21 or less.  Now, it's
         the computer's chance to draw. Computer draws cards until the computer's
         total is > 16.  If computer goes over 21, the computer looses.
      */

      System.out.println();
      System.out.println("User stands.");
      System.out.println("Computer's cards are");
      System.out.println("    " + computer.getCard(0));
      System.out.println("    " + computer.getCard(1));
      while (computer.getHandTotal () <= 16) {
         Card newCard = deck.take();
         System.out.println("Computer hits and gets the " + newCard);
         computer.add(newCard);
         if (computer.getHandTotal () > 21) {
            System.out.println();
            System.out.println("Computer went over 21. You win.");
            return true;
         }
      }
      System.out.println("Computer's total is " + computer.getHandTotal ());
      
      /* If we get to this point, both players have 21 or less.  We
         can determine the winner by comparing the values of their hands. */
      
      System.out.println();
      if (computer.getHandTotal () == user.getHandTotal ()) {
         System.out.println("Computer wins on a tie.  You loose.");
         return false;
      }
      else if (computer.getHandTotal () > user.getHandTotal ()) {
         System.out.println("Computer wins, " + computer.getHandTotal () 
                          + " points to " + user.getHandTotal () + ".");
         return false;
      }
      else {
         System.out.println("You win, " + user.getHandTotal () 
                          + " points to " + computer.getHandTotal () + ".");
         return true;
      }

   }  // end play()

public static void main(String[] args) {
   
      int money;              // total amount of money the user has.
      int gamble;            // Amount user bets on a game.
      boolean userWin;      // true if the user win the game
      
      System.out.println("Hello and Welcome");
      System.out.println();
      
      money = 100;  // User starts with $100.
   
      while (true) {
          System.out.println("You have " + money + " dollars.");
          do {
             System.out.println("How many dollars do you want to bet?  (Enter 0 to end.)");
             System.out.print("? ");
             gamble = Keyboard.getlnInt();
             if (gamble < 0 || gamble > money)
                 System.out.println("Your answer must be between 0 and " + money + '.');
          } while (gamble < 0 || gamble > money);
          if (gamble == 0)
             break;
          userWin = play();
          if (userWin)
             money = money + gamble;
          else
             money = money - gamble;
          System.out.println();
          if (money == 0) {
             System.out.println("you are out of money!");
             break;
          }
      }
      
      System.out.println();
      System.out.println("You leave with $" + money + '.');
   
   } 
   
}