Capture and save an image of the screen

The code below captures the screen and saves it.
Depending on your need, you can modify it to do just what you want

import java.awt.AWTException;
import java.awt.Robot;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;

class ScreenCapture {
  public static void main(String args[]) throws
           AWTException, IOException {
     // capture the whole screen
     BufferedImage screencapture = new Robot().createScreenCapture(
           new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()) );

     // Save as JPEG
     File file = new File("screencapture.jpg");
     ImageIO.write(screencapture, "jpg", file);

     // Save as PNG
     // File file = new File("screencapture.png");
     // ImageIO.write(screencapture, "png", file);
  }
}