Take screenshot of a particular JFrame in Swing(Java)

screenshotOfJframe.java

private void scrshtActionPerformed() {                                             
        /**
         * this gist outline the process to grab the screenshot of a particular
         * JFrame in Swing from which the method is invoked
         * 
         * "this" is the particualr frame here
         * */
        BufferedImage screenshotImage = new BufferedImage(
                this.getBounds().width, this.getBounds().height,
                BufferedImage.TYPE_INT_RGB);
        this.paint(screenshotImage.getGraphics());
        try {
            ImageIO.write(screenshotImage, "png", new File("screenShot.png" ));
        } catch (IOException ex) {
            System.err.println("ImageIsuues");
        }
    }