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test/java/net/InetAddress/HashSpread.java

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   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  * 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  */
  23 
  24 /*
  25  * @test
  26  * @bug 4687909
  27  * @summary Check Inet6Address.hashCode returns a reasonable spread of hash
  28  *          codes.

  29  */
  30 import java.net.InetAddress;
  31 import java.net.UnknownHostException;
  32 import java.util.Random;
  33 
  34 public class HashSpread {
  35 
  36     static Random r = new Random();
  37 
  38     /**
  39      * Generate and return a random IPv6 address.
  40      */
  41     static InetAddress randomIPv6Adress() {
  42         StringBuffer sb = new StringBuffer();
  43 
  44         for (int i=0; i<8; i++) {
  45 
  46             if (i > 0)
  47                 sb.append(":");
  48 




   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  * 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  */
  23 
  24 /*
  25  * @test
  26  * @bug 4687909
  27  * @summary Check Inet6Address.hashCode returns a reasonable spread of hash
  28  *          codes.
  29  * @key randomness
  30  */
  31 import java.net.InetAddress;
  32 import java.net.UnknownHostException;
  33 import java.util.Random;
  34 
  35 public class HashSpread {
  36 
  37     static Random r = new Random();
  38 
  39     /**
  40      * Generate and return a random IPv6 address.
  41      */
  42     static InetAddress randomIPv6Adress() {
  43         StringBuffer sb = new StringBuffer();
  44 
  45         for (int i=0; i<8; i++) {
  46 
  47             if (i > 0)
  48                 sb.append(":");
  49 


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