Question

I wish to write a method that can return the difference in value of 2 cards.
Im confused as I’m learning enums and not sure of the most efficient way to implement it.

public class Card implements Comparable<Card> {
public enum Rank {TWO, THREE, FOUR, FIVE, SIX,SEVEN, EIGHT, NINE, TEN, 
                    JACK, QUEEN, KING, ACE}
public enum Suit {CLUBS, DIAMONDS, HEARTS, SPADES}

public static int difference(Card c){

}

Any help or guidance would be appreciated.

Answer 1

public enum Rank {ACE(1), TWO(2); /* obviously add the other values*/
    private int value  ;
    Rank(int value){
        this.value = value;
    };
    public int getValue(){
       return this.value;
    }

    public int calcDifference(Rank rank){
        return getValue() - rank.getValue();
    }

};

which can then be called like so :

Rank rankAce =  Rank.ACE;
System.out.println(rankAce.calcDifference(Rank.TWO));

You could remove the int value and just use ordinal, but this way gives you a bit of flexibility.