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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