7  * published by the Free Software Foundation.
   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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /* @test
  25    @bug 4905777
  26    @summary PrintStream.println(Object) oversynchronized, can deadlock

  27 */
  28 
  29 import java.io.PrintStream;
  30 
  31 public class OversynchronizedTest extends Thread {
  32     private static TestObj testObj = new TestObj("This is a test.");
  33     private static int loopNum = 100;
  34 
  35     public void run() {
  36         for(int i=0; i<loopNum; i++) {
  37             testObj.test();
  38 
  39             //passing an object to System.out.println might cause deadlock
  40             //if the object has a synchronized toString() method.
  41             //using System.out.println(testObj.toString()) won't have a problem
  42            System.out.println(testObj);
  43         }
  44     }
  45 
  46     public static void main(String args[]) throws Exception {

   7  * published by the Free Software Foundation.
   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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /* @test
  25    @bug 4905777
  26    @summary PrintStream.println(Object) oversynchronized, can deadlock
  27    @key randomness
  28 */
  29 
  30 import java.io.PrintStream;
  31 
  32 public class OversynchronizedTest extends Thread {
  33     private static TestObj testObj = new TestObj("This is a test.");
  34     private static int loopNum = 100;
  35 
  36     public void run() {
  37         for(int i=0; i<loopNum; i++) {
  38             testObj.test();
  39 
  40             //passing an object to System.out.println might cause deadlock
  41             //if the object has a synchronized toString() method.
  42             //using System.out.println(testObj.toString()) won't have a problem
  43            System.out.println(testObj);
  44         }
  45     }
  46 
  47     public static void main(String args[]) throws Exception {