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Datei: Sprache: JAVA

/*
* Copyright (c) 2001, 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 4486049
* @summary min and max methods fail if size changes in between a call to size
*           and an attempt to iterate.
* @author Josh Bloch
*/

import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;

public class MinMax {
    public static void main(String[] args) {
        Set s = new LyingSet();
        s.add("x");
        if (!Collections.min(s).equals("x"))
            throw new RuntimeException("1: " + Collections.min(s));
        if (!Collections.max(s).equals("x"))
            throw new RuntimeException("2: " + Collections.max(s));

        s.add("y");
        if (!Collections.min(s).equals("x"))
            throw new RuntimeException("3: " + Collections.min(s));
        if (!Collections.max(s).equals("y"))
            throw new RuntimeException("4: " + Collections.max(s));

        s.add("w");
        if (!Collections.min(s).equals("w"))
            throw new RuntimeException("5: " + Collections.min(s));
        if (!Collections.max(s).equals("y"))
            throw new RuntimeException("6: " + Collections.max(s));

        s.clear();
        s.add("x");
        if (!Collections.min(s, Collections.reverseOrder()).equals("x"))
            throw new RuntimeException("1a: " + Collections.min(s));
        if (!Collections.max(s, Collections.reverseOrder()).equals("x"))
            throw new RuntimeException("2a: " + Collections.max(s));

        s.add("y");
        if (!Collections.min(s, Collections.reverseOrder()).equals("y"))
            throw new RuntimeException("3a: " + Collections.min(s));
        if (!Collections.max(s, Collections.reverseOrder()).equals("x"))
            throw new RuntimeException("4a: " + Collections.max(s));

        s.add("w");
        if (!Collections.min(s, Collections.reverseOrder()).equals("y"))
            throw new RuntimeException("5a: " + Collections.min(s));
        if (!Collections.max(s, Collections.reverseOrder()).equals("w"))
            throw new RuntimeException("6a: " + Collections.max(s));
    }
}

class LyingSet extends LinkedHashSet {
    public int size() {
        return super.size() + 1; // Lies, lies, all lies!
    }
}

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