test/tools/javac/generics/wildcards/neg/AmbiguousCast.java

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  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  * @bug 4897892
  27  * @summary cast to parameterized type is accepted although it should be rejected
  28  * @author gafter
  29  *
  30  * @compile/fail -source 1.5 -Werror -Xlint:unchecked AmbiguousCast.java
  31  */
  32 
  33 class Test {
  34 
  35     private static class GenericWrapper<Elem> {
  36         private Elem theObject;
  37         public GenericWrapper(Elem arg) {
  38             theObject = arg;
  39         }
  40         public <T extends Elem> GenericWrapper (GenericWrapper<T> other) {
  41             this.theObject = other.theObject;
  42         }
  43         public String toString() {
  44             return theObject.toString();
  45         }
  46     }
  47     private static GenericWrapper<String> method (Object wrappedString) {
  48         return (GenericWrapper<String>) wrappedString;
  49     }
  50 


  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  * @bug 4897892
  27  * @summary cast to parameterized type is accepted although it should be rejected
  28  * @author gafter
  29  *
  30  * @compile/fail  -Werror -Xlint:unchecked AmbiguousCast.java
  31  */
  32 
  33 class Test {
  34 
  35     private static class GenericWrapper<Elem> {
  36         private Elem theObject;
  37         public GenericWrapper(Elem arg) {
  38             theObject = arg;
  39         }
  40         public <T extends Elem> GenericWrapper (GenericWrapper<T> other) {
  41             this.theObject = other.theObject;
  42         }
  43         public String toString() {
  44             return theObject.toString();
  45         }
  46     }
  47     private static GenericWrapper<String> method (Object wrappedString) {
  48         return (GenericWrapper<String>) wrappedString;
  49     }
  50