/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ public class Card {    private final int rank;    private final int suit;    // Kinds of suits    public final static int DIAMONDS = 1;    public final static int CLUBS    = 2;    public final static int HEARTS   = 3;    public final static int SPADES   = 4;    // Kinds of ranks    public final static int ACE   = 1;    public final static int DEUCE = 2;    public final static int THREE = 3;    public final static int FOUR  = 4;    public final static int FIVE  = 5;    public final static int SIX   = 6;    public final static int SEVEN = 7;    public final static int EIGHT = 8;    public final static int NINE  = 9;    public final static int TEN   = 10;    public final static int JACK  = 11;    public final static int QUEEN = 12;    public final static int KING  = 13;    public Card(int rank, int suit) {        assert isValidRank(rank);        assert isValidSuit(suit);        this.rank = rank;        this.suit = suit;    }    public int getSuit() {        return suit;    }    public int getRank() {        return rank;    }    public static boolean isValidRank(int rank) {        return ACE <= rank && rank <= KING;    }    public static boolean isValidSuit(int suit) {        return DIAMONDS <= suit && suit <= SPADES;    }    public static String rankToString(int rank) {        switch (rank) {        case ACE:            return "Ace";        case DEUCE:            return "Deuce";        case THREE:            return "Three";        case FOUR:            return "Four";        case FIVE:            return "Five";        case SIX:            return "Six";        case SEVEN:            return "Seven";        case EIGHT:            return "Eight";        case NINE:            return "Nine";        case TEN:            return "Ten";        case JACK:            return "Jack";        case QUEEN:            return "Queen";        case KING:            return "King";        default:            //Handle an illegal argument.  There are generally two            //ways to handle invalid arguments, throwing an exception            //(see the section on Handling Exceptions) or return null            return null;        }        }        public static String suitToString(int suit) {        switch (suit) {        case DIAMONDS:            return "Diamonds";        case CLUBS:            return "Clubs";        case HEARTS:            return "Hearts";        case SPADES:            return "Spades";        default:            return null;        }        }    public static void main(String[] args) {    	    	// must run program with -ea flag (java -ea ..) to    	// use assert statements        assert rankToString(ACE) == "Ace";        assert rankToString(DEUCE) == "Deuce";        assert rankToString(THREE) == "Three";        assert rankToString(FOUR) == "Four";        assert rankToString(FIVE) == "Five";        assert rankToString(SIX) == "Six";        assert rankToString(SEVEN) == "Seven";        assert rankToString(EIGHT) == "Eight";        assert rankToString(NINE) == "Nine";        assert rankToString(TEN) == "Ten";        assert rankToString(JACK) == "Jack";        assert rankToString(QUEEN) == "Queen";        assert rankToString(KING) == "King";        assert suitToString(DIAMONDS) == "Diamonds";        assert suitToString(CLUBS) == "Clubs";        assert suitToString(HEARTS) == "Hearts";        assert suitToString(SPADES) == "Spades";    }}