PPT Slide

Registering Event Handlers

To have Java use the event listener, you must tell Java to do so by registering the event

To register a specific event, use addListener methods built into each component.

For example, a Button or MenuItem has the method:

addActionListener(ActionListener a)

to add an action listener to itself.

Adding an action listener specifies that, whenever that Button or MenuItem gets an action event, it will call the method actionPerformed( ) on all the actionListeners that have

been added to it

that any class that implements the ActionListener

interface must provide code for actionPerformed( )