Event Handling

• The applet must be notified of events:

  • example: a button is clicked

• Three objects of interest:

  • The event source – the object causing the event (e.g., a button)
  • The event - represented by an object
  • The listener - our applet — must react in some way

• Source notifies the listener

  • sends message with event object as argument

    • Particular message is specified in an interface

Previous slide

Next slide

Back to first slide

View graphic version