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  1. JDK
  2. JDK-6954234

JDK 1.6 @Override: Implementation different from Specification

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2
    • Resolution: Won't Fix
    • Affects Version/s: 6u10
    • Fix Version/s: None
    • Component/s: tools
    • Labels:
    • Subcomponent:
    • CPU:
      x86
    • OS:
      windows_vista

      Description

      FULL PRODUCT VERSION :


      A DESCRIPTION OF THE PROBLEM :
      Specification: If a method is annotated with @Override but does not _override_ a _superclass_ method, compilers are required to generate an error message (see http://java.sun.com/javase/6/docs/api/java/lang/Override.html).

      Implementation: _Implementing_ an _interface_ method using @Override will compile fine and NOT generate an error message.

      Note: The specification was consistent to the implementation in JDK 1.5 but the implementation was changed in JDK 1.6 without changing the specification.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      1. Use the @override annotation when implementing an interface methode. This will NOT generate an error message when compiling with JDK 1.6.

      2. Now look in the JDK Specification (see http://java.sun.com/javase/6/docs/api/java/lang/Override.html). It says there should have been a compiler error (as was the case in JDK 1.5), because you did not _overwrite_ a _superclass_ method, you just _implemented_ an _interface_ method.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      There a two ways to fix the bug:
      1. Fix the specification of the @Override annotation in JDK 1.6.
      or
      2. Fix the implementation of the @Override annotation in JDK 1.6 and consider a new @Implement adding an http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6399361

      REPRODUCIBILITY :
      This bug can be reproduced always.

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              Assignee:
              darcy Joe Darcy
              Reporter:
              webbuggrp Webbug Group
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