Card.java

import java.util.Objects;

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

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

    public Rank getRank() { return rank; }
    public Suit getSuit() { return suit; }
    public int getValue() { return rank.getValue(); }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Card card = (Card) o;
        return suit == card.suit &&
                rank == card.rank;
    }

    @Override
    public int hashCode() {
        return Objects.hash(suit, rank);
    }

    @Override
    public String toString() {
        return rank.getSymbol() + suit.getSymbol();
    }
}