[hardwired]

Code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class TFB {
    private static final long serialVersionUID = 1L;
    JDesktopPane desk;
    JDesktopPane ifdesk;
    JScrollPane scrollpane;
    JInternalFrame iframe;
    JFrame frame;
    JList jList1;
    JInternalFrame currentframe;
    Integer currentframenumber;
    String currentframename;
    Boolean[] downuptracker;
    Integer deskwidth = 1000;
    Integer deskheight = 1000;
    Integer scrollwidth = 1000;
    Integer scrollheight = 1000;
    JButton DownUpButton;

    public static void main(String[] args) {
        new TFB();
    }

    public TFB(){
        downuptracker = new Boolean [99];
        frame = new JFrame("Test Frame Button");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        scrollpane = new JScrollPane(desk,
            ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
            ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
        scrollpane.setPreferredSize(new Dimension(scrollwidth, scrollheight));
        // If you're going to make a new JDesktopPane here there is
        // no need to have the enclosing class extend JDesktopPane.
        desk = new JDesktopPane();
        desk.setPreferredSize(new Dimension(deskwidth, deskheight));
        // Only need to do this one time.
        UIManager.getDefaults().put("InternalFrame.icon", "");
        int i = 5;
        for (int j = 0; j <= i; j++){
//            UIManager.getDefaults().put("InternalFrame.icon", "");
            iframe = new JInternalFrame("Internal Frame: " + j,                   

                       false, true, false, false);
            iframe.setName(String.valueOf(j));
            iframe.setBounds(30*j, 30*j,265 , 80);
            iframe.addInternalFrameListener(new InternalFrameListener(){
                public void internalFrameClosing(InternalFrameEvent e) {}
                public void internalFrameClosed(InternalFrameEvent e) {}
                public void internalFrameOpened(InternalFrameEvent e) {}
                public void internalFrameIconified(InternalFrameEvent e) {}
                public void internalFrameDeiconified(InternalFrameEvent e) {}

                public void internalFrameActivated(InternalFrameEvent e) {
                    currentframe = e.getInternalFrame();
                    currentframename = e.getInternalFrame().getName();
                    currentframenumber = Integer.valueOf(currentframename);
                    System.out.println("activatedFrame name = " +
                                        currentframename);
                }
                public void internalFrameDeactivated(InternalFrameEvent e) {}
            });
            iframe.setTitle("Internal Frame :" + j);
            iframe.setVisible(true);
            downuptracker[j] = true;
//            ifdesk = new JDesktopPane();
//            iframe.getContentPane().add(ifdesk, BorderLayout.CENTER);
            DownUpButton = new JButton("Old Icon here");
//            ifdesk.add(DownUpButton);
            iframe.setLayout(null);
            DownUpButton.setBounds(0, 0, 130, 20);
            iframe.getContentPane().add(DownUpButton);
            DownUpButton.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    // Try getting a reference to the button that
                    // sent this event:
                    JButton button = (JButton)e.getSource();
                    if (downuptracker[currentframenumber].equals(true)) {
                        // Colapse frame here and change icon
                        // Since DownUpButton has been declared as a
                        // member variable in class scope this reference
                        // to "DownUpButton" will always refer/point to
                        // the last instance created.
                        //DownUpButton.setText("New Icon here");
                        button.setText("New Icon here");
                        downuptracker[currentframenumber] = false;
                    }else{
                        // Expand frame here and change icon
                        //DownUpButton.setText("Old Icon here");
                        button.setText("Old Icon here");
                        downuptracker[currentframenumber] = true;
                    }
                }
            });
            desk.add(iframe);
            iframe.moveToFront();
        }
        scrollpane.setViewportView(desk);
        frame.add(scrollpane);
//        scrollpane.setVisible(true);
        frame.setSize(800,600);
        frame.setVisible(true);
    }
}