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  1. JDK
  2. JDK-8061427

Type variables should have lower/super bounds

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    • Enhancement
    • Resolution: Other
    • P5
    • None
    • None
    • specification
    • None

    Description

      Wildcards can have lower bounds. Type variables can't. Since wildcards are
      converted to type variables with lower bounds by capture conversion the
      compiler and the specification must deal with type variables with lower bounds
      anyways. Thus it appears to be a minor addition to the language to allow lower
      bounds on type variables.

      ###@###.### 2004-05-25

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. JDK-6182618 <X super T> void bar1(Class<X> x) does not compile

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

          Enhancement - null JDK-5052943 4.10.4: Improve lub for lower-bounded wildcards and variables

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-6192945 Declaration order of interdependent generic types should not matter

          • P5 - Cosmetic problem like misspelt words or misaligned text.
          • Closed

          Enhancement - null JDK-8061410 Multiply-bounded reference type expressions

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

          Enhancement - null JDK-8061426 Wildcard should have multiple bounds similar to type variables

          • P5 - Cosmetic problem like misspelt words or misaligned text.
          • Closed

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              abuckley Alex Buckley
              abuckley Alex Buckley
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              Dates

                Created:
                Updated:
                Resolved: