Use assert the verify value : Java Beans « Language Basics « Java






Use assert the verify value

 
/*
 * 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";

  }
}

   
  








Related examples in the same category

1.How to create Java bean componentHow to create Java bean component
2.Simple Java bean containerSimple Java bean container
3.BeanContext SupportBeanContext Support
4.BeanContext Child SupportBeanContext Child Support
5.how to use the instantiateChild() convenience method to create a bean automatically nested into a bean contexthow to use the instantiateChild() convenience method to create a bean automatically nested into a bean context
6.illustrate delivery of the BeanContextMembershipEventillustrate delivery of the BeanContextMembershipEvent
7.Creates all of the objects, a tests the service capabilitiesCreates all of the objects, a tests the service capabilities
8.A JTable subclass that displays a table of the JavaBeans properties of any specified classA JTable subclass that displays a table of the JavaBeans properties of any specified class
9.Demonstration of set functionality in beans
10.Obtains all property descriptors from a bean (interface or implementation).