How to take screenshots fast in Java?

Question

I am implementing a simple eye tracker, which requires fast screenshoting of what is happening on the screen simultaneously with capturing the video from webcam.

The

Answer 1

To capture full screen.

Robot robot = new Robot();
Rectangle screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage screenFullImage = robot.createScreenCapture(screenRect);
ImageIO.write(screenFullImage, format, new File(destination));

To capture partial screen.

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Rectangle rect = new Rectangle(0, 0, screenSize.width / 2, screenSize.height / 2);
Robot robot = new Robot();
BufferedImage screenFullImage = robot.createScreenCapture(rect);
ImageIO.write(screenFullImage, format, new File(destination));

Reference : link