问java.awt.Robot在Kylin v10系统下如何执行单次keyPress？

import java.awt.AWTException;
import java.awt.Robot;


public class TestRobot {
	public static void main(String[] args) {
		Robot robot;
	    try
	    {
	        robot = new Robot();
	        robot.keyPress(java.awt.event.KeyEvent.VK_ENTER);
	    } catch (AWTException e)
	    {
	       e.printStackTrace();
	    }
	}
}

robot = new Robot();
robot.keyPress(java.awt.event.KeyEvent.VK_ENTER);
robot.keyRelease(java.awt.event.KeyEvent.VK_ENTER);