Java截取屏幕

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public static void captureScreen(String fileName) throws Exception {
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Rectangle screenRectangle = new Rectangle(screenSize);
    Robot robot = new Robot();
    BufferedImage image = robot.createScreenCapture(screenRectangle);
    ImageIO.write(image, "png", new File(fileName));
}
public static void main(String[] args) {
    try {
    	captureScreen("F:\\Test22.png");
    } catch (Exception e) {
        // TODO Auto-generated catch block
    }
}