1 /*
   2  * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug     4193200
  27  * @summary Basic test for Collections.frequency
  28  * @author  Josh Bloch
  29  */
  30 
  31 import java.util.*;
  32 
  33 public class Frequency {
  34     final static int N = 100;
  35     public static void main(String args[]) {
  36         test(new ArrayList<Integer>());
  37         test(new LinkedList<Integer>());
  38     }
  39 
  40     static void test(List<Integer> list) {
  41         for (int i = 0; i < N; i++)
  42             for (int j = 0; j < i; j++)
  43                 list.add(i);
  44         Collections.shuffle(list);
  45 
  46         for (int i = 0; i < N; i++)
  47             if (Collections.frequency(list, i) != i)
  48                 throw new RuntimeException(list.getClass() + ": " + i);
  49     }
  50 }