getting notification from JLabel

[miguel lisboa]

during my google i read this:

Components (except JLabel) can generate events

i was surprised, but in fact couldnt find any answer to my Q:
how can i be notified when a JLabel's text change?

TiA

[Michael Dunn]

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.beans.*;
class Testing extends JFrame
{
  JLabel lbl = new JLabel();
  public Testing()
  {
    setLocation(400,300);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel jp = new JPanel(new GridLayout(1,3));
    final JTextField tf = new JTextField();
    JButton btn = new JButton("Set Text -->");
    jp.add(tf);
    jp.add(btn);
    jp.add(lbl);
    getContentPane().add(jp);
    pack();
    btn.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        lbl.setText(tf.getText());}});
    lbl.addPropertyChangeListener(new PropertyChangeListener(){
      public void propertyChange(PropertyChangeEvent pce){
        if(pce.getPropertyName().equals("text"))
        {
          JOptionPane.showMessageDialog(getContentPane(),"Label changed");
        }}});
  }
  public static void main(String[] args){new Testing().setVisible(true);}
}

[miguel lisboa]

no one will claim that wasnt notified

before posting my Q i stood twice at API: addPropertyChangeListener, but gave up since couldnt find any 'text'
property
i missed the fact that could exist others:

The listener is registered for all bound properties of this class, including the following:

my actual interpretation is the following: JLabel is a bean, 'text' is also a bound property so ...

thanks a lot Michael

EDITED: i cant post the direct link to 'addPropertyChangeListener' because of javaRanch html code policies
[ June 27, 2005: Message edited by: miguel lisboa ]