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  1. JDK
  2. JDK-6526448

Unecessary checkcast generated

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Details

    • Bug
    • Resolution: Duplicate
    • P5
    • None
    • 6
    • tools
    • None
    • generic
    • generic

    Description

      JDK1.6 (final) compiles:

        Serializable zz = null;
        String[] ss = (String[])zz;

      to:

      201: aconst_null
      202: astore 16
      204: aload 16
      206: checkcast #54; //class "[Ljava/lang/String;"
      209: checkcast #54; //class "[Ljava/lang/String;"
      212: astore 17

      Why the double checkcast?

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. JDK-6246854 Unnecessary checkcast in generated code

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

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              wtaosunw Wei Tao (Inactive)
              abuckley Alex Buckley
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              Dates

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