code: // from gee.cs.oswego.edu/home/jsr166/jsr166
  
  package jsr166tests.jtreg.util.Vector;
  
  /*
   * Copyright 2000-2001 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 4334376
   * @summary Vector's lastIndexOf(Object) was lacking synchronization
   * @author Konstantin Kladko
   */
  import java.util.*;
  
  public class SyncLastIndexOf {
  
      static Vector v = new Vector();
  
      static class RemovingThread extends Thread {
  
          public void run() {
             synchronized(v) {
                  try {
                  sleep(200);
                  } catch (InterruptedException e) {
                  }
                  v.removeElementAt(0);
             }
          }
      }
  
      public static void main(String args[]) {
          Integer x = new Integer(1);
          v.addElement(x);
          new RemovingThread().start();
          try {
              v.lastIndexOf(x);
          } catch (IndexOutOfBoundsException e) {
              throw new RuntimeException(
                    "Vector.lastIndexOf() synchronization failed.");
          }
      }
  }
  