code: // from gee.cs.oswego.edu/home/jsr166/jsr166
  
  package jsr166tests.jtreg.util.LinkedList;
  
  /*
   * 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 4308549
   * @summary Due to a bug in LinkedList's ListIterator's remove(),
   *     the ListIterator would not check for comodification before remove.
   * @author Konstantin Kladko
   */
  
  import java.util.*;
  import java.util.ListIterator;
  import java.util.ConcurrentModificationException;
  
  public class ComodifiedRemove {
      public static
      void main(String[] args) {
          List list = new LinkedList();
          Object o1 = new Integer(1);
          list.add(o1);
          ListIterator e = list.listIterator();
          e.next();
          Object o2 = new Integer (2);
          list.add(o2);
  
          try{
              e.remove();
          } catch (ConcurrentModificationException cme) {
              return;
          }
  
          throw new RuntimeException(
              "LinkedList ListIterator.remove() comodification check failed.");
      }
  }
  