Cannot press Window+L using robot in Java

Question

I am using the Robot class to simulate key press in Java. But i am unable to press Window key+L although i am able to press them individually. Here is my code:

private void pressKey()
{
    Robot r=new Robot();
    robot.keyPress(KeyEvent.VK_WINDOWS);
    robot.keyPress(KeyEvent.VK_L);
    robot.keyRelease(KeyEvent.VK_WINDOWS);
    robot.keyRelease(KeyEvent.VK_L);
}

Answer 1

Try this instead:

Runtime.getRuntime().exec("rundll32 user32.dll,LockWorkStation");

Answer 2

Try:

private void pressKey(){
   Robot r=new Robot();
   robot.keyPress(KeyEvent.VK_WINDOWS);
   robot.keyPress(KeyEvent.VK_L);
   robot.keyRelease(KeyEvent.VK_L);
   robot.keyRelease(KeyEvent.VK_WINDOWS);
}

Answer 3

Try this:

robot.keyPress(KeyEvent.VK_WINDOWS);
robot.delay(100);
robot.keyPress(KeyEvent.VK_L);
robot.delay(200);
robot.keyRelease(KeyEvent.VK_L);
robot.delay(100);
robot.keyRelease(KeyEvent.VK_WINDOWS);