001package algs12;
002import stdlib.*;
003
004public class XCardSimple implements Comparable<XCardSimple> {
005        public static enum Rank { TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN, JACK, QUEEN, KING, ACE }
006        public static enum Suit { CLUBS, DIAMONDS, HEARTS, SPADES }
007
008        public final Rank rank;
009        public final Suit suit;
010        public XCardSimple (Rank r, Suit s) { this.rank = r; this.suit = s; }
011        public String toString () { return rank + " of " + suit; }
012        public int compareTo (XCardSimple that) {
013                if (this.suit.compareTo (that.suit) < 0) return -1;
014                if (this.suit.compareTo (that.suit) > 0) return +1;
015                if (this.rank.compareTo (that.rank) < 0) return -1;
016                if (this.rank.compareTo (that.rank) > 0) return +1;
017                return 0;
018        }
019        public boolean equals (Object that) {
020                if (that == null)
021                        return false;
022                if (this.getClass() != that.getClass())
023                        return false;
024                // This does the right thing but is inefficient.
025                // Since equals may be used more than compareTo, there is usually a separate implementation.
026                return 0 == this.compareTo ((XCardSimple) that);
027        }
028
029        public static void main (String[] args) {
030                Suit s1 = Suit.CLUBS;
031                //Suit s2 = new Suit();
032
033                XCardSimple c1 = new XCardSimple(Rank.ACE, Suit.SPADES);
034                XCardSimple c2 = new XCardSimple(Rank.ACE, Suit.SPADES);
035                StdOut.println (c1 + (c1.equals(c2) ? " equals " : " does not equal ") + c2);
036        }
037}