test/tools/javac/generics/wildcards/AssignmentDifferentTypes3.java

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   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @summary Test subtyping for wildcards with related type bounds.
  27  *
  28  * @compile/fail -source 1.5 AssignmentDifferentTypes3.java
  29  */
  30 
  31 public class AssignmentDifferentTypes3 {
  32 
  33     public static void main(String[] args) {
  34         Ref<Der> derexact = null;
  35         Ref<Base> baseexact = null;
  36         Ref<? extends Der> derext = null;
  37         Ref<? extends Base> baseext = null;
  38         Ref<? super Der> dersuper = null;
  39         Ref<? super Base> basesuper = null;
  40 
  41         baseexact = derexact;   // <<fail>> <Base> = <Der>
  42     }
  43 }
  44 
  45 class Ref<T> {}
  46 class Base {}
  47 class Der extends Base {}


   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @summary Test subtyping for wildcards with related type bounds.
  27  *
  28  * @compile/fail  AssignmentDifferentTypes3.java
  29  */
  30 
  31 public class AssignmentDifferentTypes3 {
  32 
  33     public static void main(String[] args) {
  34         Ref<Der> derexact = null;
  35         Ref<Base> baseexact = null;
  36         Ref<? extends Der> derext = null;
  37         Ref<? extends Base> baseext = null;
  38         Ref<? super Der> dersuper = null;
  39         Ref<? super Base> basesuper = null;
  40 
  41         baseexact = derexact;   // <<fail>> <Base> = <Der>
  42     }
  43 }
  44 
  45 class Ref<T> {}
  46 class Base {}
  47 class Der extends Base {}