code: // from gee.cs.oswego.edu/home/jsr166/jsr166
  
  package jsr166tests.jtreg.util.AbstractMap;
  
  /*
   * Copyright 2000 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 4328748
   * @summary AbstractMap's clone() method is implemented to
   *  reset AbstractMap's private fields after super.clone()
   *
   * @author Konstantin Kladko
   */
  
  import java.util.*;
  
  public class AbstractMapClone extends AbstractMap implements Cloneable {
  
      private Map map = new HashMap();
  
      public Set entrySet() {
          return map.entrySet();
      }
  
      public Object put(Object key, Object value) {
          return map.put(key, value);
      }
  
      public Object clone() {
          AbstractMapClone clone = null;
          try {
          clone = (AbstractMapClone)super.clone();
          } catch (CloneNotSupportedException e) {
          }
          clone.map = (Map)((HashMap)map).clone();
          return clone;
      }
  
      public static void main(String[] args) {
          AbstractMapClone m1 = new AbstractMapClone();
          m1.put("1", "1");
          Set k1 = m1.keySet();
          AbstractMapClone m2 = (AbstractMapClone)m1.clone();
          Set k2 = m2.keySet();
          m2.put("2","2");
          if (k1.equals(k2)) {
              throw new RuntimeException("AbstractMap.clone() failed.");
          }
      }
  }
  