Thread: Java monster is back!

*So, I have not asked any java questions in a while so here I go....*

Create a Driver program called DeckOfCardTest that contains a 2-dimensional array of 4 decks of cards. Randomly initialize each of the four decks and print them from your driver program.

I already have the class for a Card and DeckOfCards. I just don't fully understand how to make the 2-dimensional array for the 4 decks of cards.

this is what I do when I try...

Code:

DeckOfCards[][] decks = new DeckOfCards[4][52];

and for randomly initializing each of the four decks I use the shuffle() method from DeckOfCards class

Code:

for(int i = 0; i < decks.length; i++)
 decks[i].shuffle();

and I have no clue how to print out...*I know Im sucking it hard on this problem*
Here are the other classes for reference

this is class CARD

Code:

public class Card 
{
  private String face; // face of card ("Ace", "Deuce", ...)
  private String suit; // suit of card ("Hearts", "Diamonds", ...)

  // two-argument constructor initializes card's face and suit
  public Card( String cardFace, String cardSuit )
  {
   face = cardFace; // initialize face of card
   suit = cardSuit; // initialize suit of card
  } // end two-argument Card constructor

  // return String representation of Card
  public String toString() 
  { 
   return face + " of " + suit;
  } // end method toString
} // end class Card

this is class DECKOFCARDS

Code:

import java.util.Random;

public class DeckOfCards
{
  private Card deck[]; // array of Card objects
  private int currentCard; // index of next Card to be dealt
  private final int NUMBER_OF_CARDS = 52; // constant number of Cards
  private Random randomNumbers; // random number generator

  // constructor fills deck of Cards
  public DeckOfCards()
  {
   String faces[] = { "Ace", "Deuce", "Three", "Four", "Five", "Six", 
     "Seven", "Eight", "Nine", "Ten", "Jack", "Queen", "King" };
   String suits[] = { "Hearts", "Diamonds", "Clubs", "Spades" };

   deck = new Card[ NUMBER_OF_CARDS ]; // create array of Card objects
   currentCard = 0; // set currentCard so first Card dealt is deck[ 0 ]
   randomNumbers = new Random(); // create random number generator

   // populate deck with Card objects
   for ( int count = 0; count < deck.length; count++ ) 
     deck[ count ] = 
      new Card( faces[ count % 13 ], suits[ count / 13 ] );
  } // end DeckOfCards constructor

  // shuffle deck of Cards with one-pass algorithm
  public void shuffle()
  {
   // after shuffling, dealing should start at deck[ 0 ] again
   currentCard = 0; // reinitialize currentCard

   // for each Card, pick another random Card and swap them
   for ( int first = 0; first < deck.length; first++ ) 
   {
     // select a random number between 0 and 51 
     int second = randomNumbers.nextInt( NUMBER_OF_CARDS );
     
     // swap current Card with randomly selected Card
     Card temp = deck[ first ];    
     deck[ first ] = deck[ second ];  
     deck[ second ] = temp;      
   } // end for
  } // end method shuffle

  // deal one Card
  public Card dealCard()
  {
   // determine whether Cards remain to be dealt
   if ( currentCard < deck.length )
     return deck[ currentCard++ ]; // return current Card in array
   else    
     return null; // return null to indicate that all Cards were dealt
  } // end method dealCard
} // end class DeckOfCards