Card.java

final class Card {
    private Rank rank;
    private Suit suit;

    public Card(Rank rank, Suit suit) {
        this.rank = rank;
        this.suit = suit;
    }

    public boolean sameAs(Card anotherCard) {
        return rank.sameAs(anotherCard.rank) &&
                suit.sameAs(anotherCard.suit);
    }
}