java利用robot,rectangle截屏

public class CaptureScreen{    public static void captureScreen()    {        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();        Rectangle screenRectangle = new Rectangle(screenSize);        Robot robot;        try        {            robot = new Robot();            BufferedImage image = robot.createScreenCapture(screenRectangle);            SimpleDateFormat sdf = new SimpleDateFormat("截图YYYY年MM月dd日HH时mm分ss秒");            String fileName = "C:\\"+sdf.format(new Date())+".bmp";            ImageIO.write(image, "bmp", new File(fileName));        }        catch (AWTException e)        {            // TODO Auto-generated catch block            e.printStackTrace();        }        catch (Exception e)        {            // TODO Auto-generated catch block            e.printStackTrace();        }    }

}