Problem with scrolling a panel containing an image

Question

I am having a problem adding scrolling capabilities to a tabbed panel containing pages containing an image. In my program, I have a class called ImagePanel that extends JPanel and contains an image read from a file. In another class, I create a tabbed panel and add to it ImagePanels.
The problem I'm facing is that the pages added to my tabbed panel contain scroll bars, but these scroll bars are not scrollable (i.e. I cannot use the bars the scroll and see the missing parts of the image).
Any help on this manner is highly appreciated.
The code is shown below:
JTabbedPane m_pathwayTabbedPane = new JTabbedPane();
ImageIcon overviewImageIcon = IconLoader.readImageIcon(pathway.gif);
ImagePanel overviewPanel = new ImagePanel(overviewImageIcon.getImage());
JScrollPane graphcrollPane = new JScrollPane(overviewPanel,
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
m_pathwayTabbedPane.addTab(StringManager.OVERVIEW, graphcrollPane);

Answer 1

import java.awt.*;
import java.io.*;
import java.net.*;
import javax.imageio.ImageIO;
import javax.swing.*;
public class ScrollingImages
    public static void main(String[] args)
        String[] fileNames = {
            "images/bclynx.jpg", "images/mtngoat.jpg", "images/redfox.jpg"
        JPanel panel = new JPanel(new GridBagLayout());
        panel.setBackground(Color.black);
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(5,5,5,5);
        gbc.gridwidth = gbc.REMAINDER;
        for(int j = 0; j < fileNames.length; j++)
            panel.add(new ImageComponent(fileNames[j]), gbc);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new JScrollPane(panel));
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
class ImageComponent extends JPanel
    Image image;
    public ImageComponent(String fileName)
        loadImage(fileName);
        setBackground(Color.black);
    protected void paintComponent(Graphics g)
        super.paintComponent(g);
        int w = getWidth();
        int h = getHeight();
        int imageWidth = image.getWidth(this);
        int imageHeight = image.getHeight(this);
        int x = (w - imageWidth)/2;
        int y = (h - imageHeight)/2;
        g.drawImage(image, x, y, this);
     * For the JScrollPane which will inquire about our size
     * which it needs to properly set its scrollbars.
    public Dimension getPreferredSize()
        return new Dimension(image.getWidth(this), image.getHeight(this));
    private void loadImage(String fileName)
        try
            URL url = getClass().getResource(fileName);
            image = ImageIO.read(url);
        catch(MalformedURLException mue)
            System.out.println(mue.getMessage());
        catch(IOException ioe)
            System.out.println(ioe.getMessage());
}