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 import java.util.ArrayList;

    31 import java.util.Collections;

    32 import java.util.HashMap;

    33 import java.util.HashSet;

    34 import java.util.List;

    35 import java.util.Map;

    36 import java.util.Set;

    37 

    38 public class EqualsTest {

    39     public static void main(String[] args) {

    40         boolean test;

    41 

    42         /* synchronizedList test */

    43         List list = Collections.synchronizedList(new ArrayList());

    44         list.add(list);

    45         test = list.equals(list);

    46         assertTrue(test);

    47         list.remove(list);

    48 

    49         /* synchronizedSet test */

    50         Set s = Collections.synchronizedSet(new HashSet());

    51         s.add(s);

    52         test = s.equals(s);

    53         assertTrue(test);

    54 

    55         /* synchronizedMap test */

    56         Map m =  Collections.synchronizedMap(new HashMap());

    57         test = m.equals(m);

    58         assertTrue(test);

    59 

    60     }

    61 

    62     private static void assertTrue(boolean b) {

    63         if (!b)

    64             throw new RuntimeException("assertion failed");

    65     }

    66 }

    67