How to view the image as cylindrical view in panorama image viewer?

Question

i am facing the problem to view the image as cylindrical view.
i.e, the image moved at the end position ,the image seems to jump to the start.
instead of this the image should view as cylindrical view. i.e, that the end of the image sticks to the beginning of the image.
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.MediaTracker;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
public class PanoramaImageDemo
     private BufferedImage biBackground = null;
     private JFrame f;
     PanoramaImageDemo()
          f = new JFrame("AniDemo 1.0");
          f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          loadBackground("C:/Documents and Settings/All Users/Documents/My Pictures/Sample Pictures/sunset.jpg");
          myPanel p = new myPanel(biBackground);
          f.add(p);
          f.pack();
          f.setVisible(true);
     private void loadBackground(String fn)
          File file = new File(fn);
          BufferedImage image = null;
          try
               image = ImageIO.read(file);
          catch (IOException e1)
               System.out.println("File Not Found");
          MediaTracker mt = new MediaTracker(f);
          mt.addImage(image, 0);
          try
               mt.waitForID(0);
               biBackground = new BufferedImage(image.getWidth(), image
                         .getHeight(), BufferedImage.TYPE_INT_RGB);
               Graphics2D g2 = biBackground.createGraphics();
               g2.drawImage(image, 0, 0, null);
               g2.dispose();
          catch (InterruptedException e)
               System.out.println(e.toString());
     public static void main(String[] args)
          new PanoramaImageDemo();
     class myPanel extends JPanel implements ActionListener
          private BufferedImage background;
          private BufferedImage bi = null;
          private int upperLeft = 0;
          int width;
          int height;
          myPanel(BufferedImage bg)
               super();
               background = bg;
               width = background.getWidth() / 2;
               height = background.getHeight();
               bi = background.getSubimage(upperLeft, 0, width, height);
               setPreferredSize(new Dimension(width, height));
               Timer t = new Timer(5, this);
               t.start();
          public void actionPerformed(ActionEvent e)
               upperLeft += 1;
               if (upperLeft >= width)
                    upperLeft = 38; // adjust to make rollover seemless
               bi = background.getSubimage(upperLeft, 0, width, height);
               repaint();
          public void paintComponent(Graphics g)
               g.drawImage(bi, 0, 0, this);
}plz help me regarding this concept

Answer 1

I have learnt a technique when I am programming in flash.
Assume you have a photo cat.jpg with 10 units in width and 10 units in height. You can have a view(viewport) 10 units in width and 10 units in height.
The following shows the width of the photo:
012345679
To show an effect of panorama, you can draw 2 photo at any time. I assume the eyesight of a person move from left to right with 1 unit at a time.
The original image is 0123456789.
If the person move eyesight to right by one unit, the image become
1234567890
If the person move eyesight to right by one more unit, the image become
2345678901
You can program the by drawing 2 images at any time.
0123456789(zero width for second image)
123456789(0, 1 unit in width in second image)
23456789(01, 2 unit in width in second image)
To display part of image, try this link to a program to crop image
http://www.java2s.com/Code/Java/2D-Graphics-GUI/Imagecrop.htm