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/**
* A standard playing card.
*/
public class Card {
public static final String[] RANKS = {
null, "Ace", "2", "3", "4", "5", "6", "7",
"8", "9", "10", "Jack", "Queen", "King"};
public static final String[] SUITS = {
"Clubs", "Diamonds", "Hearts", "Spades"};
private final int rank;
private final int suit;
/**
* Constructs a card of the given rank and suit.
*/
public Card(int rank, int suit) {
this.rank = rank;
this.suit = suit;
}
/**
* Returns a negative integer if this card comes before
* the given card, zero if the two cards are equal, or
* a positive integer if this card comes after the card.
*/
public int compareTo(Card that) {
if (this.suit < that.suit) {
return -1;
}
if (this.suit > that.suit) {
return 1;
}
//in some games, Aces are ranked higher than Kings
if (this.rank == 1 && that.rank == 1) {
return 0;
} else if (this.rank == 1 && that.rank != 1) {
return 1;
} else if (this.rank != 1 && that.rank == 1) {
return -1;
}
if (this.rank < that.rank) {
return -1;
}
if (this.rank > that.rank) {
return 1;
}
return 0;
}
/**
* Returns true if the given card has the same
* rank AND same suit; otherwise returns false.
*/
public boolean equals(Card that) {
return this.rank == that.rank
&& this.suit == that.suit;
}
/**
* Gets the card's rank.
*/
public int getRank() {
return this.rank;
}
/**
* Gets the card's suit.
*/
public int getSuit() {
return this.suit;
}
/**
* Returns the card's index in a sorted deck of 52 cards.
*/
public int position() {
return this.suit * 13 + this.rank - 1;
}
/**
* Returns a string representation of the card.
*/
public String toString() {
return RANKS[this.rank] + " of " + SUITS[this.suit];
}
}