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  1. JDK
  2. JDK-4990346

wrapper static factories fail to cache as required

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Details

    • b42
    • generic, x86
    • solaris_8, windows_xp

    Description

      The latest boxing spec filed under CCC 4989021 requires an implementation
      to cache boxed values in the range -128 to 127. The following test case
      for this property fails, showing that we don't cache.

      class CacheBox {
          public static void main(String[] args) {
              Integer i1 = 12;
              Integer i2 = 12;
              if (i1 != i2) throw new Error();
          }
      }

      Attachments

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. JDK-4993091 Performance improvements questionable with new static valueOf() methods

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-6628737 Specification of wrapper class valueOf static factories should require caching of boxing range

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8200478 For boxing conversion javac uses Long.valueOf which does not guarantee caching according to its javadoc

          • P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-5005319 wrapper objects created in wrapper classes are not cached

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-5006128 Incorrect javadoc markup in Integer class description

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-7040854 Different Integer objects created for the same primitive int value

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

          Enhancement - null JDK-4931256 Boxed primitive types should cache common values

          • P3 - Major loss of function.
          • Closed

          Enhancement - null JDK-6352381 Allow primitives to be used as 'first-class' Objects

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

          Enhancement - null JDK-7190924 5.1.7: JLS does not mention caching of autoboxed longs

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

          Enhancement - null JDK-8252827 Caching Integer.toString just like Integer.valueOf

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

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              darcy Joe Darcy
              gafter Neal Gafter
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