Quelle EqualsTest.java Sprache: JAVA

/*
* Copyright (c) 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

/*
* @test
* @bug 7144488
* @summary Infinite recursion for some equals tests in Collections
*/

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class EqualsTest {
    public static void main(String[] args) {
        boolean test;

        /* synchronizedList test */
        List list = Collections.synchronizedList(new ArrayList());
        list.add(list);
        test = list.equals(list);
        assertTrue(test);
        list.remove(list);

        /* synchronizedSet test */
        Set s = Collections.synchronizedSet(new HashSet());
        s.add(s);
        test = s.equals(s);
        assertTrue(test);

        /* synchronizedMap test */
        Map m =  Collections.synchronizedMap(new HashMap());
        test = m.equals(m);
        assertTrue(test);

    }

    private static void assertTrue(boolean b) {
        if (!b)
            throw new RuntimeException("assertion failed");
    }
}

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