[7.1]deck of card

1. Example
Design the data structures for a generic deck of cards.
Explain how you would subclass it to implement particular card game.



2. Implementation
Q1: deck of card?
A1: 52 cards is composed of 4 type of card (Spades, Heart, Diamond, Clubs) and each type has 13 cards from letter A,2,3,4,5,6,7,8,9,10,J,Q,K(think it of number 1 to number 13)
A2:An 2D array such as card[4][13], first dimension is type and second dimension is letter
Q1: how to play those cards?
A1: shuffle, take one from deck for each player, ???

public class Card 
{



     public enum Suit 
     {
         CLUBS (1), SPADES(2), HEARTS(3), DIAMONDS(4);
         int value;
         private Suit(int v){ value = v;}
     }




     private int card;
     private Suit suit;
      



     public Card(int r, Suit s)
     {
         card = r;
         suit = s;
     }
     public int getValue() {return card;}
     public Suit getSuit() {return suit;}




}
Public class BlackJackCard extends Card 
{
      public BlackJackCard(int r, Suit s) {super(r,s);}
     public int value() 
{
          int r = super.value();
           // card.value = A
           if (r==1) return 11; // aces are 11
           // card.vlaue = 2~9
           if (r < 10) return r;
           // card.value = 10,J,Q,K
           return 10;
      } 


      boolean isAce()
      {
           return super.value() ==1;
      }
}


Public class Hand 
{
      // use BlackJackCard class to get a set of cards
} 

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