awt Robot.Keypress not working in full screen games

问题

robot.keypress() works on notepad and browsers but isn't working on full screen games.

Why would this be so?

Code:

robot.keyPress(java.awt.event.KeyEvent.VK_S);

来源：https://stackoverflow.com/questions/15346166/awt-robot-keypress-not-working-in-full-screen-games