JDK-4634390 : JDK code doesn't respect contract for equals and hashCode
  • Type: Bug
  • Component: client-libs
  • Sub-Component: java.beans
  • Affected Version: 1.4.0,1.4.2
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic,solaris_2.6
  • CPU: generic,sparc
  • Submitted: 2002-02-07
  • Updated: 2003-04-02
  • Resolved: 2003-04-02
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Other
5.0 tigerFixed
Related Reports
Duplicate :  
JDK-4770303 - EJ: java.beans.PropertyDescriptor equals() overriden but not hashCode()
Duplicate :  
JDK-4641061 - PropertyDescriptor.hashCode() call produces incorrect result
Relates :  
JDK-6582164 - JavaBeans tests should be open source
Relates :  
JDK-4908704 - Regression-test java/beans/PropertyDescriptor/bug4634390.java fails
Relates :  
JDK-4634068 - JDK code doesn't respect contract for equals and hashCode
Description
The following problem was originally reported in 4634068.

There are a number of classes that do not respect the
implied contract for equals and hashCode. See, for example,
Joshua Bloch's book "Effective Java", items 7-8.

java.beans.IndexedPropertyDescriptor redefines
  equals(Object) but not
  hashCode()
java.beans.PropertyDescriptor redefines
  equals(Object) but not
  hashCode()

Problems found by applying automatic tools to JDK
libraries. However, manual inspectation of the classes
reveals the same problems.

-- iag@sfbay 2002-02-06
Comments
CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: tiger tiger-beta FIXED IN: tiger INTEGRATED IN: tiger tiger-b04
14-06-2004
EVALUATION Will fix for tiger PropertyDescriptor: public int hashCode() { return (((propertyType == null) ? 0 : propertyType.hashCode()) ^ ((readMethod == null) ? 1 : readMethod.hashCode()) ^ ((writeMethod == null) ? 2 : writeMethod.hashCode()) ^ ((propertyEditorClass == null) ? 3 : propertyEditorClass.hashCode()) ^ ((bound == false) ? 0 : 1) ^ ((constrained == false) ? 0 : 2) ); } IndexedPropertyDescriptor: public int hashCode() { return (super.hashCode() ^ ((indexedPropertyType == null) ? 0 : indexedPropertyType.hashCode()) ^ ((indexedReadMethod == null) ? 1 : indexedReadMethod.hashCode()) ^ ((indexedWriteMethod == null) ? 2 : indexedWriteMethod.hashCode()) ); } ###@###.### 2002-02-08
08-02-2002