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  1. JDK
  2. JDK-6557182

Unchecked warning *and* inconvertible types

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    • b48
    • generic
    • generic
    • Verified

    Description

      The compiler generates both a warning and an error on this program:

      class Outer<T extends Number & Comparable<String>> {
          void foo(T t) {
              Comparable<Integer> ci = (Comparable<Integer>) t;
          }
      }

      Outer.java:3: warning: [unchecked] unchecked cast
      found : T
      required: java.lang.Comparable<java.lang.Integer>
              Comparable<Integer> ci = (Comparable<Integer>) t;
                                                             ^
      Outer.java:3: inconvertible types
      found : T
      required: java.lang.Comparable<java.lang.Integer>
              Comparable<Integer> ci = (Comparable<Integer>) t;
                                                             ^
      1 error
      1 warning

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-6541884 javac bug (JDK6): missing unchecked warning

          • P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-6790039 overhaul cast-conversion (umbrella)

          • P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-6526446 Fixes to JLS5.5 Casting Conversion

          • 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-6557279 Tweak provable distinctness

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

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              mcimadamore Maurizio Cimadamore
              ahe Peter Ahe
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