Java in a Nutshell, 5th Edition [Electronic resources]

Signals that an AWT component, JavaBeans component, or Swing component can have only one EventListener object registered for some specific type of event. That is, it signals that a particular event is a unicast event rather than a multicast event. This exception type serves a formal purpose in the Java event model; its presence in the throws clause of an EventListener registration method (even if the method never actually throws the exception) signals that an event is a unicast event.

public class

TooManyListenersException extends Exception { // Public Constructors public

TooManyListenersException ( ); public

TooManyListenersException (String

s ); }