Tự động chụp ảnh màn hình bằng java

import java.awt.AWTException;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import java.io.File;
import java.net.Socket;

public static void createCapture(String fileName){
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
  Rectangle screenRectangle = new Rectangle(screenSize);
  Robot robot;
try {
robot = new Robot();
BufferedImage image = robot.createScreenCapture(screenRectangle);
try {
ImageIO.write(image, "png", new File(fileName));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (AWTException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}


public static void main(String[] args) {
int delay = 5000;   // delay for 5 sec before start
int period = 1000 * 15 * 60;  // repeat every 15 minute.
Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
      String fileName = "filename.png";
        createCapture(fileName);
        }
}, delay, period);
}