java 屏幕截图

public static void captureScreen(String fileName) throws Exception {

 
  Toolkit.getDefaultToolkit().getScreenSize();  

    Rectangle screenRectangle = new Rectangle(100, 100);  

    Robot robot = new Robot();  

    BufferedImage image = robot.createScreenCapture(screenRectangle); 

    ImageIO.write(image, "png", new File(fileName)); 

}