maintain a BufferedImage as it is.........

[netharam ram]

HI, I want to save a buffered Image as an object to a file ,later convert it to a jpeg or gif
file on the user's request.There is an advantage in this method since the user can't view the
file directly since it is saved as a buffered image.I also want to display this image in my
JFrame,how can it be done?Please reply as soon as possible,awaiting your precious reply Nate.
Happy middling with java.
Netharam.:confused.

[Nathan Pruett]

I'm not sure how you would save a buffered image to a file without setting the filetype... it would probably be better to save it as some default file type and convert it if the user requested. ( Besides, to save a BufferedImage object, you'd have to subclass it to implement Serializable, and write all the pixel values out to a file or something... believe me... getting it to save as a default file type is easier... )

To display your Buffered Image to the screen is easy... just put it in an ImageIcon, put that ImageIcon on a JLabel, and put the JLabel on a JFrame... here's the code...

import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
 
public class ScreenViewer extends JFrame {
    public static void main( String[] arg ) {
        new ScreenViewer();
    }
    
    public ScreenViewer() {
        super( "Screen Viewer" );
        setDefaultCloseOperation( EXIT_ON_CLOSE );
        setSize( 400, 400 );
        try {
            Robot robot = new Robot();
            Dimension screenSize  = Toolkit.getDefaultToolkit().getScreenSize();
            Rectangle screen = new Rectangle( screenSize );
            BufferedImage i = robot.createScreenCapture( screen );
            ImageIcon icon = new ImageIcon( i );
            JLabel l = new JLabel( icon );
            JScrollPane scroll = new JScrollPane( l );
            getContentPane().add( scroll );
        }
    catch ( AWTException x ) {
        x.printStackTrace();
        System.exit( 1 );
    }
        setVisible( true );
    }
}

If you wanted to display a saved image file you could just put the image file's filename in the ImageIcon constructor instead.

-Nate