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jsr166 |
1.1 |
/* |
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jsr166 |
1.2 |
* Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. |
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jsr166 |
1.1 |
* 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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jsr166 |
1.2 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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jsr166 |
1.1 |
*/ |
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/** |
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* @test |
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* @bug 4323074 |
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* @summary Basic test for new rotate algorithm |
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jsr166 |
1.3 |
* @key randomness |
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jsr166 |
1.1 |
*/ |
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import java.util.*; |
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public class Rotate { |
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// Should have lots of distinct factors and be > ROTATE_THRESHOLD |
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static final int SIZE = 120; |
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static Random rnd = new Random(); |
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public static void main(String[] args) throws Exception { |
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List a[] = {new ArrayList(), new LinkedList(), new Vector()}; |
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for (int i=0; i<a.length; i++) { |
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List lst = a[i]; |
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for (int j=0; j<SIZE; j++) |
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lst.add(new Integer(j)); |
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int totalDist = 0; |
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for (int j=0; j<10000; j++) { |
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int dist = rnd.nextInt(200) - 100; |
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Collections.rotate(lst, dist); |
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// Check that things are as they should be |
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totalDist = (totalDist + dist) % SIZE; |
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if (totalDist < 0) |
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totalDist += SIZE; |
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int index =0; |
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for (int k=totalDist; k<SIZE; k++, index++) |
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if (((Integer)lst.get(k)).intValue() != index) |
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throw new Exception("j: "+j+", lst["+k+"]="+lst.get(k)+ |
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", should be "+index); |
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for (int k=0; k<totalDist; k++, index++) |
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if (((Integer)lst.get(k)).intValue() != index) |
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throw new Exception("j: "+j+", lst["+k+"]="+lst.get(k)+ |
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", should be "+index); |
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} |
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} |
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} |
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} |
