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  1. JDK
  2. JDK-4452162

Exception thrown inside the Robot's delay(...) method cannot be caught

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P5
    • Resolution: Won't Fix
    • Affects Version/s: 1.3.0
    • Fix Version/s: None
    • Component/s: client-libs
    • Labels:
    • Subcomponent:
    • CPU:
      x86
    • OS:
      windows_98

      Description



      Name: boT120536 Date: 04/29/2001


      java version "1.3.0"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
      Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)


      The InterruptedException exception generated inside the java.awt.Robot class's
      delay(...) method can not be handled by the calling application. The bug can be
      found in the Java 2 SDK 1.3.1 RC1 on Windows NT 4.0, too. Here is the sample
      code, which clearly demonstrates the bug:

      /*
       * This code demonstrates the bug in the java.awt.Robot class related to the
       * delay(...) method. An interruption of the thread, waiting for the expiration
       * of the time period specified as an argument to the delay(...) method, could
       * cause an abrupt exit from the application. The exception generated inside
       * the Robot's delay(...) method can not be handled!
       */
       
      import java.awt.*;

      public class RobotTest {
          static Robot robot;
          
          static class DormantThread extends Thread {
              public void run() {
                  try {
                      // This call should behave exactly as Thread.sleep(5000), but
                      // due to the bug in the Robot class, it does not.
                      robot.delay(5000);
                  } catch (Throwable ignored) {}
              }
          }
                  
          public static void main(String args[]) {
              Thread t = new DormantThread();
              
              try {
                  robot = new Robot();
              } catch (AWTException e) {
                  System.exit(1);
              }

              t.start();
              try {
                  Thread.sleep(1000);
              } catch (InterruptedException ingored) {}
              t.interrupt();
              
              System.exit(0);
          }
      }

      After running the program listed above, the following error message is shown in
      the command window:

      java.lang.InterruptedException: sleep interrupted
              at java.lang.Thread.sleep(Native Method)
              at java.awt.Robot.delay(Robot.java:356)
              at RobotTest$DormantThread.run(RobotTest.java:19)

      By analyzing the sample code, it is obvious, that this message should never
      appear in the command window.
      (Review ID: 121165)
      ======================================================================

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              Assignee:
              bchristi Brent Christian
              Reporter:
              bonealsunw Bret O'neal (Inactive)
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