1 /*
2  * Copyright (c) 2012, 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 7144488
27  * @summary Infinite recursion for some equals tests in Collections
28  */
29 
30 package test.java.util.Collections;
31 
32 import java.util.ArrayList;
33 import java.util.Collections;
34 import java.util.HashMap;
35 import java.util.HashSet;
36 import java.util.List;
37 import java.util.Map;
38 import java.util.Set;
39 
40 public class EqualsTest {
main(String[] args)41     public static void main(String[] args) {
42         boolean test;
43 
44         /* synchronizedList test */
45         List list = Collections.synchronizedList(new ArrayList());
46         list.add(list);
47         test = list.equals(list);
48         assertTrue(test);
49         list.remove(list);
50 
51         /* synchronizedSet test */
52         Set s = Collections.synchronizedSet(new HashSet());
53         s.add(s);
54         test = s.equals(s);
55         assertTrue(test);
56 
57         /* synchronizedMap test */
58         Map m =  Collections.synchronizedMap(new HashMap());
59         test = m.equals(m);
60         assertTrue(test);
61 
62     }
63 
assertTrue(boolean b)64     private static void assertTrue(boolean b) {
65         if (!b)
66             throw new RuntimeException("assertion failed");
67     }
68 }
69 
70