Capture.java

import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.ImageIO;

public class Capture {
	public static void captureScreen(String fileName) throws Exception {
		Dimension screenSize = java.awt.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 {
			JFileChooser fc = new JFileChooser(); 
			int i = 0;
			while(true){
	 			System.out.println("[ Captura " + (i+1) + "]");
				Thread.currentThread().sleep(5 * 1000);
 				String FILENAME = "D:/captura" + i + ".png";
		 		Capture.captureScreen(FILENAME);
 				System.out.println("[ Captura finalizada ]");
				i++;
			}	
 		}
 		catch(Exception e){
 			e.printStackTrace();
 		}
 	}
}