Question

I've created a Card class and I'm asked to implement a class called DeckOfCards that stores 52 objects of the Card class. It says to include methods to shuffle the deck, deal a card, and report the number of cards left in the deck, and a toString to show the contents of the deck. The shuffle methods should assume a full deck. I also need to create a separate driver class that first outputs the populated deck to prove it is complete, shuffles the deck, and then deals each card from a shuffled deck, displaying each card as it is dealt.

This is what I have so far. I just don't know how to integrate it with the DeckOfCards class as an array.

public class Card {

private int faceValue;
private int suit;
  
public static final int HEARTS = 1;
public static final int DIAMONDS = 2;
public static final int CLUBS = 3;
public static final int SPADES = 4;
private static final int MAX_SUITS = 4;
private static final int MAX_FACES = 13;
//sets the face and suit of card at random
public Card() {
faceValue = (int) (Math.random() * MAX_FACES) + 1;
suit = (int) (Math.random() * MAX_SUITS) + 1;
}

public Card(int faceValue, int suit) {
this.faceValue = faceValue;
if (faceValue < 1 || faceValue > 13) {
System.out.println("ERROR: Invalid face value");
this.faceValue = 1;
}
this.suit = suit;
if (suit != HEARTS && suit != DIAMONDS && suit != CLUBS && suit != SPADES) {
System.out.println("ERROR: Invalid suit value");
this.suit = HEARTS;
}
}
//return the face value
public int getFaceValue() {
return faceValue;
}
//returns the suit
public int getSuit() {
return suit;
}
//converts suit/face number to name as string
public String toString() {
String s = "";
switch (faceValue) {
case 1:
s += " Ace";
break;
case 11:
s += " Jack";
break;
case 12:
s += " Queen";
break;
case 13:
s += " King";
break;
case 10:
s += " 10";
break;
default:
s += " " + faceValue;
break;
}

switch (suit) {
case HEARTS:
s += " of Hearts";
break;
case DIAMONDS:
s += " of Diamonds";
break;
case CLUBS:
s += " of Clubs";
break;
case SPADES:
s += " of Spades";
break;
}

return s;
}

}

Answer 1

public class aDeckOfCards
{
Card array = new Card[52]; // Array of type Card to store deck of cards
int index = 0;
int currentCountOfCards = 52;
public void makeDeck() // for formation of all 52 cards
{
for(int suit =1; suit<=4; suit++)
{
for(int face = 1; face<=13; face++ )
{
Card newCard;
newCard.suit = suit;
newCard.faceValue = face;
array[index++] = newCard;
}
}
}
  
public void reverse(Card& array1[],int start, int end) // to reverse an array
{
while(start<end)
{
Card temp = array1[start];
array1[start] = array1[end];
array1[end] = temp;
start++;
end--;
}
}
  
public void shuffle(int partition) // partition from where the cards are shuffled
{
//simply a rotation of array from partition index
// 1 2 3 4 5
// if partition index is 2
// rotated array = 4 5 3 1 2 , hence shuffled
reverse(array, 0,partition -1);
reverse(array, partition +1,51);
reverse(array, 0 , 51);
}
  
public void dealACard(int index) // index of card picked
{
if(index > currentCountOfCards)
System.out.println("Invalid option selected");
Card toDeal = array[index-1];
System.out.println(toDeal.toString()); // prints card picked
currentCountOfCards--;
System.out.println("Number of cards left: ");
System.out.print(currentCountOfCards);
}
  
   public static void main (String[] args) throws java.lang.Exception
   {
       aDeckOfCards deck;
       deck.makeDeck();
       deck.shuffle(18); // all cards from 19th card will be moved up
       deck.dealACard(26);
   }
}