EbaHash.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8186654
 * @summary Transpositions of an array result in the same
 *          EqualByteArray.hashCode()
 * @modules java.base/sun.security.util
 */

import sun.security.util.Cache;

public class EbaHash {
    public static void main(String[] args) throws Throwable {
        int h1 = new Cache.EqualByteArray(new byte[] {1,2,3}).hashCode();
        int h2 = new Cache.EqualByteArray(new byte[] {2,3,1}).hashCode();
        int h3 = new Cache.EqualByteArray(new byte[] {3,1,2}).hashCode();
        if (h1 == h2 && h2 == h3) {
            throw new RuntimeException("Transpositions of an array" +
                " resulted in the same hashCode()");
        }
    }
}