code: // from gee.cs.oswego.edu/home/jsr166/jsr166
  
  package jsr166tests.jtreg.util.Hashtable;
  
  /*
   * 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);
       }
  
  }
  