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From "Tim Ellison (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HARMONY-262) java.util.Hashtable, same as HashMap, has similar non-compatible behavior with RI
Date Tue, 28 Mar 2006 09:25:21 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-262?page=all ]

Tim Ellison reassigned HARMONY-262:
-----------------------------------

    Assign To: Tim Ellison

> java.util.Hashtable, same as HashMap, has similar non-compatible behavior with RI
> ---------------------------------------------------------------------------------
>
>          Key: HARMONY-262
>          URL: http://issues.apache.org/jira/browse/HARMONY-262
>      Project: Harmony
>         Type: Bug
>   Components: Classlib
>     Reporter: Paulex Yang
>     Assignee: Tim Ellison
>  Attachments: JIRA262.patch
>
> Same situation with the prior HashMap issue(http://issues.apache.org/jira/browse/HARMONY-206),
the Hashtable is non-compatible with RI when key is reused with different hash.
> Following test case show the non-compatiblity, it passes on RI but fails on Harmony.
> public class HashTableTest extends extends junit.framework.TestCase{
>         public void test_getLjava_lang_Object() {
> 		ReusableKey k = new ReusableKey();
> 		Hashtable h2 = new Hashtable();
> 		k.setKey(1);
> 		h2.put(k, "value1");
> 		k.setKey(13);
> 		assertNull(h2.get(k));
> 		k.setKey(12);
> 		assertNull(h2.get(k));
>       }
>       static class ReusableKey {
> 		private int key = 0;
> 		public void setKey(int key) {
> 			this.key = key;
> 		}
> 		public int hashCode() {
> 			return key;
> 		}
> 		public boolean equals(Object o) {
> 			if (o == this) {
> 				return true;
> 			}
> 			if (!(o instanceof ReusableKey)) {
> 				return false;
> 			}
> 			return key == ((ReusableKey) o).key;
> 		}
> 	}
> }

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