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

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.

Figure 16-62. java.util.TooManyListenersException

public class

TooManyListenersException extends Exception {
// Public Constructors
public

TooManyListenersException ( );
public

TooManyListenersException (String

s );
}