import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

public class Main {
  public static void main(String[] args) throws Exception {
    Robot robot = new Robot();
    robot.keyPress(KeyEvent.VK_PRINTSCREEN);
    robot.delay(40);
    robot.keyRelease(KeyEvent.VK_PRINTSCREEN);
    robot.delay(404);

    Clipboard cb = Toolkit.getDefaultToolkit().getSystemClipboard();
    DataFlavor[] flavors = cb.getAvailableDataFlavors();
    for (DataFlavor flavor : flavors) {
      if (flavor.toString().indexOf("java.awt.Image") <= 0) {
        continue;
      }
      Image i = (Image) cb.getData(flavor);
      BufferedImage bi = new BufferedImage(i.getWidth(null), i.getHeight(null),
          BufferedImage.TYPE_INT_RGB);
      Graphics2D g = bi.createGraphics();
      g.drawImage(i, 0, 0, null);
      g.dispose();
      ImageIO.write(bi, "png", new File("c:/Java_Dev/test.png"));
    }
  }
}