Bound Properties
A property is bound if a change to its value can be reported as an event to other beans.
One way is to inherit from the class: public class java.beans.PropertyChangeSupport implements java.io.Serializable … public synchronized void addPropertyChangeListener … public synchronized void removePropertyChangeListener … public void firePropertyChange (String propertyName, Object oldValue, Object newValue);
This class behaves as a source of events.