code: // from gee.cs.oswego.edu/home/jsr166/jsr166
  
  package jsr166tests.jtreg.util.Collections;
  
  /*
   * Copyright 2003 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     4822887
   * @summary Basic test for Collections.addAll
   * @author  Josh Bloch
   *
   * @compile -source 1.5 AddAll.java
   * @run main AddAll
   */
  
  import java.util.*;
  
  public class AddAll {
      final static int N = 100;
      public static void main(String args[]) {
          test(new ArrayList<Integer>());
          test(new LinkedList<Integer>());
          test(new HashSet<Integer>());
          test(new LinkedHashSet<Integer>());
      }
  
      private static Random rnd = new Random();
  
      static void test(Collection<Integer> c) {
          int x = 0;
          for (int i = 0; i < N; i++) {
              int rangeLen = rnd.nextInt(10);
              if (Collections.addAll(c, range(x, x + rangeLen)) !=
                  (rangeLen != 0))
                  throw new RuntimeException("" + rangeLen);
              x += rangeLen;
          }
          if (c instanceof List) {
              if (!c.equals(Arrays.asList(range(0, x))))
                  throw new RuntimeException(x +": "+c);
          } else {
              if (!c.equals(new HashSet<Integer>(Arrays.asList(range(0, x)))))
                  throw new RuntimeException(x +": "+c);
          }
      }
  
      private static Integer[] range(int from, int to) {
          Integer[] result = new Integer[to - from];
          for (int i = from, j=0; i < to; i++, j++)
              result[j] = new Integer(i);
          return result;
      }
  }
  