L - the type of event listener that is supported by this proxy.public class EventListenerSupport<L> extends Object implements Serializable
An EventListenerSupport object can be used to manage a list of event
 listeners of a particular type. The class provides
 addListener(Object) and removeListener(Object) methods
 for registering listeners, as well as a fire() method for firing
 events to the listeners.
 
To use this class, suppose you want to support ActionEvents. You would do:
 public class MyActionEventSource
 {
   private EventListenerSupport<ActionListener> actionListeners =
       EventListenerSupport.create(ActionListener.class);
   public void someMethodThatFiresAction()
   {
     ActionEvent e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, "somethingCool");
     actionListeners.fire().actionPerformed(e);
   }
 }
 
 Serializing an EventListenerSupport instance will result in any
 non-Serializable listeners being silently dropped.
 
| Modifier and Type | Class and Description | 
|---|---|
| protected class  | EventListenerSupport.ProxyInvocationHandlerAn invocation handler used to dispatch the event(s) to all the listeners. | 
| Constructor and Description | 
|---|
| EventListenerSupport(Class<L> listenerInterface)Creates an EventListenerSupport object which supports the provided
 listener interface. | 
| EventListenerSupport(Class<L> listenerInterface,
                    ClassLoader classLoader)Creates an EventListenerSupport object which supports the provided
 listener interface using the specified class loader to create the JDK
 dynamic proxy. | 
| Modifier and Type | Method and Description | 
|---|---|
| void | addListener(L listener)Registers an event listener. | 
| void | addListener(L listener,
           boolean allowDuplicate)Registers an event listener. | 
| static <T> EventListenerSupport<T> | create(Class<T> listenerInterface)Creates an EventListenerSupport object which supports the specified
 listener type. | 
| protected InvocationHandler | createInvocationHandler()Create the  InvocationHandlerresponsible for broadcasting calls
 to the managed listeners. | 
| L | fire()Returns a proxy object which can be used to call listener methods on all
 of the registered event listeners. | 
| L[] | getListeners()Get an array containing the currently registered listeners. | 
| void | removeListener(L listener)Unregisters an event listener. | 
public EventListenerSupport(Class<L> listenerInterface)
listenerInterface - the type of listener interface that will receive
        events posted using this class.NullPointerException - if listenerInterface is
         null.IllegalArgumentException - if listenerInterface is
         not an interface.public EventListenerSupport(Class<L> listenerInterface, ClassLoader classLoader)
listenerInterface - the listener interface.classLoader - the class loader.NullPointerException - if listenerInterface or
         classLoader is null.IllegalArgumentException - if listenerInterface is
         not an interface.public static <T> EventListenerSupport<T> create(Class<T> listenerInterface)
T - the type of the listener interfacelistenerInterface - the type of listener interface that will receive
        events posted using this class.NullPointerException - if listenerInterface is
         null.IllegalArgumentException - if listenerInterface is
         not an interface.public L fire()
public void addListener(L listener)
listener - the event listener (may not be null).NullPointerException - if listener is
         null.public void addListener(L listener, boolean allowDuplicate)
allowDuplicate is false.listener - the event listener (may not be null).allowDuplicate - the flag for determining if duplicate listener
 objects are allowed to be registered.NullPointerException - if listener is null.public void removeListener(L listener)
listener - the event listener (may not be null).NullPointerException - if listener is
         null.public L[] getListeners()
EventListenerSupport instance.protected InvocationHandler createInvocationHandler()
InvocationHandler responsible for broadcasting calls
 to the managed listeners.  Subclasses can override to provide custom behavior.Copyright © 2001–2016 The Apache Software Foundation. All rights reserved.