1 /*
2  * Copyright (c) 1999, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /*
25  * @test
26  * @bug 4224271
27  * @summary A null Comparator is now specified to indicate natural ordering.
28  */
29 
30 package test.java.util.Collections;
31 
32 import java.util.ArrayList;
33 import java.util.Arrays;
34 import java.util.Collections;
35 import java.util.List;
36 
37 public class NullComparator {
main(String[] args)38     public static void main(String[] args) throws Exception {
39         List list = new ArrayList(100);
40         for (int i=0; i<100; i++)
41             list.add(new Integer(i));
42         List sorted = new ArrayList(list);
43         Collections.shuffle(list);
44 
45         Object[] a = list.toArray();
46         Arrays.sort(a, null);
47         if (!Arrays.asList(a).equals(sorted))
48             throw new Exception("Arrays.sort");
49         a = list.toArray();
50         Arrays.sort(a, 0, 100, null);
51         if (!Arrays.asList(a).equals(sorted))
52             throw new Exception("Arrays.sort(from, to)");
53         if (Arrays.binarySearch(a, new Integer(69)) != 69)
54             throw new Exception("Arrays.binarySearch");
55 
56         List tmp = new ArrayList(list);
57         Collections.sort(tmp, null);
58         if (!tmp.equals(sorted))
59             throw new Exception("Collections.sort");
60         if (Collections.binarySearch(tmp, new Integer(69)) != 69)
61             throw new Exception("Collections.binarySearch");
62         if (!Collections.min(list, null).equals(new Integer(0)))
63             throw new Exception("Collections.min");
64         if (!Collections.max(list, null).equals(new Integer(99)))
65             throw new Exception("Collections.max");
66     }
67 }
68