I have noticed that this bug seems to only show up on Windows 2000 & Windows XP. I can't reproduce it on WinNT. The program attempts to do the following:

press SHIFT
press DELETE
release DELETE
release SHIFT

However, on Win2K, it seems to do the following:

press SHIFT
release SHIFT
press DELETE
release DELETE
press SHIFT
release SHIFT

This happened on JDK 1.3.1 so I believe that the bug has been there since the beginning of Robot. I tried the test on:

java version "1.4.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-rc-b86)
Java HotSpot(TM) Client VM (build 1.4.0-rc-b86, mixed mode)

The following program will demonstrate this problem.

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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class WinRobotTest extends JFrame {

    private JPanel panel;
    private JTextField textField;
    private Robot robot;

    public static void main(String[] args) {
        WinRobotTest r = new WinRobotTest();
        r.runTest();
    }

    public WinRobotTest() {
        try {
            robot = new Robot();
        } catch(Exception e) {
            e.printStackTrace();
        }

        textField = new JTextField(20);
        textField.addKeyListener(new KeyListener() {
            public void keyPressed(KeyEvent e) {
                System.out.println("Key Pressed: " + e.getKeyCode());
            }

            public void keyReleased(KeyEvent e) {
                System.out.println("Key Released: " + e.getKeyCode());
            }

            public void keyTyped(KeyEvent e) {
                System.out.println("Key Typed: " + e.getKeyCode());
            }
        });

        panel = new JPanel();
        panel.add(textField);

        getContentPane().add(panel);

        pack();
        setVisible(true);
    }

    public void runTest() {
        try {
            Thread.sleep(2000);
        } catch(Exception e) {
            e.printStackTrace();
        }

        textField.requestFocus();

        robot.keyPress(KeyEvent.VK_SHIFT);
        robot.keyPress(KeyEvent.VK_DELETE);
        robot.keyRelease(KeyEvent.VK_DELETE);
        robot.keyRelease(KeyEvent.VK_SHIFT);
    }
}
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###@###.### 2001-11-20
Swing Test Development