JDK-6441058 : (coll) TreeSet.add(): specified NPE behaviour inconsistent with implementation
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.util:collections
  • Affected Version: 6
  • Priority: P3
  • Status: Closed
  • Resolution: Duplicate
  • OS: generic
  • CPU: generic
  • Submitted: 2006-06-20
  • Updated: 2012-10-08
  • Resolved: 2006-06-23
Related Reports
Duplicate :  
JDK-5045147 - (coll) Adding null key to empty TreeMap without Comparator should throw NPE
Description
CR 5045147 was closed with resolution "will not fix". 
At the same time new(updated in Mustang) specification for methods TreeSet.add(E o)
says: "NullPointerException - if the specified element is null and this set uses natural ordering,
or its comparator does not permit null elements".
Hence the current spec contradicts to the implementation.
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Comments
EVALUATION It's difficult to come up with an implementation that is sufficiently backward-compatible and a spec that has enough weasel words to permit the current undesirable but backward-compatible implementation.
20-06-2006