* Definition: http://journals.ecs.soton.ac.uk/java/tutorial/post1.0/ui/actionlistener.html
** Simple Example: http://journals.ecs.soton.ac.uk/java/tutorial/post1.0/ui/eventintro.html#example1

''This example emphasizes an event registration, but forgets event unregistration, therefore possibly leading to a MemoryLeak. This is the typical kind of code that teaches very bad habits to developers.''

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* Api: http://java.sun.com/j2se/1.4.2/docs/api/java/awt/event/ActionListener.html
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An ActionListener is a sub-interface of EventListener
* It allows an EventSource to know about all Listeners which want to be informed

When a user
* clicks a button 
* doubleclicks a list item
* chooses a menu item
* presses return in a text field
example
 '' button.addActionListener(this);''

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ActionListener''''''s in JavaSwing implement the ActionListener interface with an ActionListener.actionPerformed(ActionEvent e) method defined which is called when an event (clicking a button, etc) takes place. They sort-of represent the controller in ModelViewController. -- BrianMcCallister

''In what way would you say they differ from the MVC controller?''

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Listeners are MethodObject''''''s.

''They don't have to be.''