Implementing a Bound Property
Bound properties fire a PropertyChangeEvent whenever its value is changed. This example bean implements a single bound integer property called ``property''. 


int property;
public int getProperty() {
  return property;
}
public void setProperty(
  int newValue) {
  property = newValue;
  pceListeners.firePropertyChange(
    "property"
    ,new Integer(property),
     new Integer(newValue));
}
    
// Create the listener list.
PropertyChangeSupport pceListeners = 
  new PropertyChangeSupport(this);
    
// The listener list wrapper methods.
public synchronized void addPropertyChangeListener(
  PropertyChangeListener listener) {
    pceListeners.addPropertyChangeListener(listener);
  
}
public synchronized void removePropertyChangeListener(
  PropertyChangeListener listener) {
    pceListeners.removePropertyChangeListener(
      listener);
}