| 1 |
jsr166 |
1.1 |
/* |
| 2 |
jsr166 |
1.2 |
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved. |
| 3 |
jsr166 |
1.1 |
* 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 |
jsr166 |
1.2 |
* 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 |
jsr166 |
1.1 |
*/ |
| 23 |
|
|
|
| 24 |
|
|
/* |
| 25 |
|
|
* @test |
| 26 |
|
|
* @bug 4593209 |
| 27 |
|
|
* @summary Reverse comparator was subtly broken |
| 28 |
|
|
* @author Josh bloch |
| 29 |
|
|
*/ |
| 30 |
|
|
|
| 31 |
|
|
import java.util.*; |
| 32 |
|
|
|
| 33 |
|
|
public class ReverseOrder { |
| 34 |
|
|
public static void main(String[] args) throws Exception { |
| 35 |
|
|
Foo[] a = { new Foo(2), new Foo(3), new Foo(1) }; |
| 36 |
|
|
List list = Arrays.asList(a); |
| 37 |
|
|
Collections.sort(list, Collections.reverseOrder()); |
| 38 |
|
|
|
| 39 |
|
|
Foo[] golden = { new Foo(3), new Foo(2), new Foo(1) }; |
| 40 |
|
|
List goldenList = Arrays.asList(golden); |
| 41 |
|
|
if (!list.equals(goldenList)) |
| 42 |
|
|
throw new Exception(list.toString()); |
| 43 |
|
|
} |
| 44 |
|
|
} |
| 45 |
|
|
|
| 46 |
|
|
class Foo implements Comparable { |
| 47 |
|
|
int val; |
| 48 |
|
|
Foo(int i) { val = i; } |
| 49 |
|
|
|
| 50 |
|
|
public int compareTo(Object o) { |
| 51 |
|
|
Foo f = (Foo)o; |
| 52 |
|
|
return (val < f.val ? Integer.MIN_VALUE : (val == f.val ? 0 : 1)); |
| 53 |
|
|
} |
| 54 |
|
|
|
| 55 |
|
|
public boolean equals(Object o) { |
| 56 |
|
|
return o instanceof Foo && ((Foo)o).val == val; |
| 57 |
|
|
} |
| 58 |
|
|
|
| 59 |
|
|
public int hashCode() { return val; } |
| 60 |
|
|
|
| 61 |
|
|
public String toString() { return Integer.toString(val); } |
| 62 |
|
|
} |
