A bean class can fire off any type of event, including custom events. As with properties, events are identified by a specific pattern of method names.
public void add<Event>Listener(<Event>Listener a) public void remove<Event>Listener(<Event>Listener a)
The listener type must be a descendant of
For example, a Swing
JButton is a bean that fires
action events when the user clicks on it.
JButton includes the following methods (actually inherited from
AbstractButton ), which are the bean pattern for an event:
public void addActionListener(ActionListener l); public void removeActionListener(ActionListener l);
Bean events are recognized by builder tools and can be used in wiring components together. For example, you can wire a button's
action event to make something happen, like invoking another bean's method.