ImageFrame

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;


public class ImageFrame  extends JFrame {
    BufferedImage img;

    public ImageFrame(BufferedImage img, String title) {
	this.img = img;
	setup(title);
   }

   public ImageFrame(String filename) {
	readImage(filename);
	setup(filename);
   }

   private void setup(String title) {
	setTitle(title);
	//setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        add(new ImagePanel());
        pack();
	setLocationRelativeTo(null);
        setVisible(true);
   }	
    

    public void readImage(String filename) {
       try {
           img = ImageIO.read(new File(filename));
       } catch (IOException e) {
		//System.out.println(e); // e.getMessage());
		System.out.println(filename + " not found");
		System.exit(-1);
       }
    }

    public void writeImage(String filename) {
		writeImage(filename,"jpg");
    }

    public void writeImage(String filename, String format) {
		File file = new File(filename + "." + format);
		try {
			ImageIO.write(img, format, file);
		} catch (IOException e) {
			System.out.println("image write failed");
			System.out.println(e);
			System.exit(-1);
		}
	}

    public Dimension getPreferredSize() {
        if (img == null) {
             return new Dimension(100,100);
        } else {
           return new Dimension(img.getWidth(null), img.getHeight(null));
       }
    }


class ImagePanel extends JPanel {


    public void paintComponent(Graphics g) {
	super.paintComponent(g);
        g.drawImage(img, 0, 0, null);
    }
}

    public static void main(String[] args) {

	ImageFrame f1 = new ImageFrame("owl.jpg");
	f1.setLocation(100,100);
	f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	ImageFrame f2 = new ImageFrame("bld.jpg");
	int w = f1.getWidth();
	f2.setLocation(150+w,100);
	ImageFrame f3 = new ImageFrame("duke_skateboard.jpg");
	int h = f1.getHeight();
	f3.setLocation(100,150+h);

    }
}