Java Capture/save image from swing Component eg : JFrame JPanel ..

Capture image from any swing Component and save to file.
Capture  :

BufferedImage image = new BufferedImage(component.getWidth(),
                                     component.getHeight(), BufferedImage.TYPE_INT_RGB);
// paints into image's Graphics
component.paint(image.getGraphics());

Save Image :

BufferedImage img = getScreenShot(component);
// write the captured image as a PNG
ImageIO.write(img, "png", new File(fileName));

Complete example :

import java.awt.Component;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
//gtiwari333@gmail.com
public class ComponentSnapShot {

    public static BufferedImage getScreenShot(Component component) {

        BufferedImage image = new BufferedImage(component.getWidth(), component.getHeight(), BufferedImage.TYPE_INT_RGB);
        // paints into image's Graphics
        component.paint(image.getGraphics());
        return image;
    }

    public static void getSaveSnapShot(Component component, String fileName) throws Exception {
        BufferedImage img = getScreenShot(component);
        // write the captured image as a PNG
        ImageIO.write(img, "png", new File(fileName));
    }

    public static void main(String[] args) throws Exception {
        JFrame frame = new JFrame();
        JPanel panel = new JPanel();
        JButton button = new JButton("Button");
        panel.add(button);

        frame.add(panel);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);

        // capture and save image
        getSaveSnapShot(panel, "panel.png");
        getSaveSnapShot(button, "button.png");
    }
}

 Outputs :