Attachment 129849 Details for Bug 269986 – java-source to show the bug

java-source to show the bug

Utl.java (text/plain), 1.96 KB, created by kurt

on 2009-03-25 11:35:04 EDT

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Creator: kurt

Created: 2009-03-25 11:35:04 EDT

Size: 1.96 KB

patch

obsolete

>public class Utl {
>
>  // --- simple
>  public static interface F1Itf<T>
>    extends Comparable<T> {
>    int getSize();
>
>    T getField();
>  }
>
>  // --- nested typed-generic
>  public static interface F2Itf<T>
>    extends Comparable<F2Itf<T>> {
>    int getSize();
>
>    T getField();
>  }
>
>  // --- Comparable
>
>  // Sun: ERROR
>  // Eclipse: ERROR
>  public static <T extends Comparable<?>> int cmp1(final T t1, final T t2) {
>    return t1.compareTo(t2);
>  }
>
>  // Sun: OK
>  // Eclipse: OK
>  public static <T extends Comparable<T>> int cmp2(final T t1, final T t2) {
>    return t1.compareTo(t2);
>  }
>
>  // --- F1Itf
>
>  // Sun: ERROR
>  // Eclipse: ERROR
>  public static <T extends F1Itf<?>> int cmp3(final T t1, final T t2) {
>    return t1.compareTo(t2);
>  }
>
>  // Sun: OK
>  // Eclipse: OK
>  public static <T extends F1Itf<T>> int cmp4(final T t1, final T t2) {
>    return t1.compareTo(t2);
>  }
>
>  // --- F2Itf
>
>  // Sun: ERROR
>  // Eclipse: OK -> wildcard in F2Itf
>  public static <T extends F2Itf<?>> int cmp5(final T t1, final T t2) {
>    return t1.compareTo(t2);
>  }
>
>  // Sun: OK
>  // Eclipse: OK
>  public static <T extends F2Itf<T>> int cmp6(final T t1, final T t2) {
>    return t1.compareTo(t2);
>  }
>}
>
>/*
> * javac -version: javac 1.6.0_11
> * java -version:
> *   java version "1.6.0_11"
> *   Java(TM) SE Runtime Environment (build 1.6.0_11-b03)
> *   Java HotSpot(TM) Client VM (build 11.0-b16, mixed mode, sharing)
> *
> * Utl.java:24: compareTo(capture#407 of ?) in java.lang.Comparable<capture#407 of ?> cannot be applied to (T)
> *   return t1.compareTo(t2);
> *            ^
> * Utl.java:38: compareTo(capture#825 of ?) in java.lang.Comparable<capture#825 of ?> cannot be applied to (T)
> *   return t1.compareTo(t2);
> *            ^
> * Utl.java:52: compareTo(Utl.F2Itf<capture#105 of ?>) in java.lang.Comparable<Utl.F2Itf<capture#105 of ?>> cannot be applied to (T)
> *   return t1.compareTo(t2);
> *            ^
> * 3 errors
> */

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Attachments on bug 269986: 129849