ous types of <a href="../../../javax/faces/event/BehaviorEvent.html" title="class in javax.faces.event"><code>BehaviorEvent</code></a>s.  All listener 
 interfaces for specific <a href="../../../javax/faces/event/BehaviorEvent.html" title="class in javax.faces.event"><code>BehaviorEvent</code></a> event types must 
 extend this interface.</p>

 <p>Implementations of this interface must have a zero-args public
 constructor.  If the class that implements this interface has state
 that needs to be saved and re