difference method java using enum types

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.

Answer 1

The simplest way to define a value of a card is to add thirteen times the suit to the rank, or to add four times the rank to the suit:

public int faceValue(Card c) {
    return 13*c.getSuit().ordinal()+c.getRank().ordinal();
}

or

public int faceValue(Card c) {
    return 4*c.getRank().ordinal()+c.getSuit().ordinal();
}

Both ways produce numbers from 0 to 51, inclusive.

With faceValue in hand, you can define the difference function as follows:

public static int faceValueDifference(Card left, Card right){
    return left.faceValue()-right.faceValue();
}