63 lines
2.0 KiB
Java
63 lines
2.0 KiB
Java
/*
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* Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/*
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* @test
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* @bug 4593209
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* @summary Reverse comparator was subtly broken
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* @author Josh bloch
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*/
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import java.util.*;
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public class ReverseOrder {
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public static void main(String[] args) throws Exception {
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Foo[] a = { new Foo(2), new Foo(3), new Foo(1) };
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List list = Arrays.asList(a);
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Collections.sort(list, Collections.reverseOrder());
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Foo[] golden = { new Foo(3), new Foo(2), new Foo(1) };
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List goldenList = Arrays.asList(golden);
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if (!list.equals(goldenList))
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throw new Exception(list.toString());
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}
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}
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class Foo implements Comparable {
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int val;
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Foo(int i) { val = i; }
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public int compareTo(Object o) {
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Foo f = (Foo)o;
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return (val < f.val ? Integer.MIN_VALUE : (val == f.val ? 0 : 1));
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}
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public boolean equals(Object o) {
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return o instanceof Foo && ((Foo)o).val == val;
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}
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public int hashCode() { return val; }
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public String toString() { return Integer.toString(val); }
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}
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