jdk-24/jdk/test/java/util/Hashtable/IllegalLoadFactor.java

/*
 * Copyright 1997-1998 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/* @test
   @bug 4093817 4189594
   @summary Test for an illegalargumentexception on loadFactor
*/



import java.util.*;

/**
 * This class tests to see if creating a hash table with an
 * illegal value of loadFactor results in an IllegalArgumentException
 */
public class IllegalLoadFactor {

      public static void main(String argv[]) throws Exception {
          boolean testSucceeded = false;
          try{
              // this should generate an IllegalArgumentException
              Hashtable bad1 = new Hashtable(100, -3);
          }
          catch (IllegalArgumentException e1) {
              testSucceeded = true;
          }
          if(!testSucceeded)
              throw new Exception("Hashtable, negative load factor");

          testSucceeded = false;
          try{
              // this should generate an IllegalArgumentException
              Hashtable bad1 = new Hashtable(100, Float.NaN);
          }
          catch (IllegalArgumentException e1) {
              testSucceeded = true;
          }
          if(!testSucceeded)
              throw new Exception("Hashtable, NaN load factor");

          testSucceeded = false;
          try{
              // this should generate an IllegalArgumentException
              HashMap bad1 = new HashMap(100, -3);
          }
          catch (IllegalArgumentException e1) {
              testSucceeded = true;
          }
          if(!testSucceeded)
              throw new Exception("HashMap, negative load factor");

          testSucceeded = false;
          try{
              // this should generate an IllegalArgumentException
              HashMap bad1 = new HashMap(100, Float.NaN);
          }
          catch (IllegalArgumentException e1) {
              testSucceeded = true;
          }
          if(!testSucceeded)
              throw new Exception("HashMap, NaN load factor");


          testSucceeded = false;
          try{
              // this should generate an IllegalArgumentException
              HashSet bad1 = new HashSet(100, -3);
          }
          catch (IllegalArgumentException e1) {
              testSucceeded = true;
          }
          if(!testSucceeded)
              throw new Exception("HashSet, negative load factor");

          testSucceeded = false;
          try{
              // this should generate an IllegalArgumentException
              HashSet bad1 = new HashSet(100, Float.NaN);
          }
          catch (IllegalArgumentException e1) {
              testSucceeded = true;
          }
          if(!testSucceeded)
              throw new Exception("HashSet, NaN load factor");

          testSucceeded = false;
          try{
              // this should generate an IllegalArgumentException
              WeakHashMap bad1 = new WeakHashMap(100, -3);
          }
          catch (IllegalArgumentException e1) {
              testSucceeded = true;
          }
          if(!testSucceeded)
              throw new Exception("WeakHashMap, negative load factor");

          testSucceeded = false;
          try{
              // this should generate an IllegalArgumentException
              WeakHashMap bad1 = new WeakHashMap(100, Float.NaN);
          }
          catch (IllegalArgumentException e1) {
              testSucceeded = true;
          }
          if(!testSucceeded)
              throw new Exception("WeakHashMap, NaN load factor");

          // Make sure that legal creates don't throw exceptions
          Map goodMap = new Hashtable(100, .69f);
          goodMap = new HashMap(100, .69f);
          Set goodSet = new HashSet(100, .69f);
          goodMap = new WeakHashMap(100, .69f);
     }

}