Disposing of an object

Question

hi,
is there a way to dispose of an object, i'm having some problems with a jdialog, it's created when a jlabel is clicked in a jframe as:
     MouseListener labelListener = new MouseAdapter() {
          public void mouseClicked(MouseEvent e) {
               LSNote1 noteOne = new LSNote1(SpotNoteFrame.this);
               noteOne.setVisible(true);
     };The code for the class that extends jdialog is:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
class LSNote1 extends JDialog {
     public LSNote1(JFrame frame) {
          super(frame,"", true);
          JLabel label6 = new JLabel(new ImageIcon("tessst.jpg"));
          label6.setTransferHandler(new ImageSelection());   
          MouseListener mouseListener = new MouseAdapter() {     
               public void mousePressed(MouseEvent e) {       
               JComponent jc = (JComponent) e.getSource();       
               TransferHandler th = jc.getTransferHandler();       
               th.exportAsDrag(jc, e, TransferHandler.COPY);     
          addWindowListener(new WindowHandler());
          label6.addMouseListener(mouseListener);
          getContentPane().add(label6);
          setSize(150,150);
          //setUndecorated(true);
          //  Handler class for window events
     class WindowHandler extends WindowAdapter {
          //  Handler for window closing event
          public void windowClosing(WindowEvent e) {
               dispose();                              //  Release the window resources
}but everytime i click the jlabel to see the LSNote1 i see the same image (.gif) from before, it's not disposing of the object noteOne, i want it so that everytime LSNote1 is closed the object is distroyed so that next time the jlabel is clicked the latest image will be loaded.
Thanks.

Answer 1

Look at the source for ImageIcon.
It makes a call to Toolkit.getDefaultToolkit().getImage(filename);
The documantation for Toolkit.getDefaultToolkit().getImage(filename) reads:
Returns an image which gets pixel data from the specified file,
whose format can be either GIF, JPEG or PNG.
The underlying toolkit attempts to resolve multiple requests with the same filename to the same returned Image.
Since the mechanism required to facilitate this sharing of
Image objects may continue to hold onto images that are no
longer of use for an indefinite period of time, developers
are encouraged to implement their own caching of images by
using the createImage variant wherever available.
I think that says it all.