test/tools/javac/generics/wildcards/neg/Readonly.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 4916607 4931647
  27  * @summary an extends-bound (covariant) wildcard is like readonly
  28  * @author gafter
  29  *
  30  * @compile/fail -source 1.5 Readonly.java
  31  */
  32 
  33 class Err<T> {
  34     Err<T> get() { return null; }
  35     void put(Err<T> t) {}
  36 
  37     static void f(Err<? extends String> e) {
  38         e.put(e.get());
  39     }
  40 }


  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 4916607 4931647
  27  * @summary an extends-bound (covariant) wildcard is like readonly
  28  * @author gafter
  29  *
  30  * @compile/fail  Readonly.java
  31  */
  32 
  33 class Err<T> {
  34     Err<T> get() { return null; }
  35     void put(Err<T> t) {}
  36 
  37     static void f(Err<? extends String> e) {
  38         e.put(e.get());
  39     }
  40 }