test/java/util/Hashtable/HashCode.java

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rev 5431 : 7126277: Alternative hashing implementation


  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 4559052
  27  * @summary Hashtable's hashCode method always returns zero(!)
  28  * @author Josh Bloch
  29  */
  30 
  31 import java.util.*;
  32 
  33 public class HashCode {
  34     public static void main(String[] args) throws Exception {
  35         Map m = new Hashtable();
  36         if (m.hashCode() != 0)
  37             throw new Exception("Empty Hashtable has nonzero hashCode.");
  38 
  39         m.put("Joe", "Blow");
  40         if (m.hashCode() != ("Joe".hashCode() ^ "Blow".hashCode()))
  41             throw new Exception("Non-empty Hashtable has wrong hashCode.");
  42     }
  43 }


  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 4559052
  27  * @summary Hashtable's hashCode method always returns zero(!)
  28  * @author Josh Bloch
  29  */
  30 
  31 import java.util.*;
  32 
  33 public class HashCode {
  34     public static void main(String[] args) throws Exception {
  35         Map m = new Hashtable();
  36         if (m.hashCode() != 0)
  37             throw new Exception("Empty Hashtable has nonzero hashCode.");
  38 



  39     }
  40 }