Event, Event Driven Program, Event Source, Listener.

Q13.Explain the following:

  1. Event
  2. Event Driven Program
  3. Event Source     
  4. Listener.

Ans.

  1.  Event: An Event is an object that represents some occurrence.Often events correspond to user actions such as pressing a mouse button, selecting an item from a menu, or typing in a text field.
  2. Event-Driven Program: A program that is oriented around a GUI responding to events from the user is called event-driven.
  3. Event Source: The event source is the GUI component in which the event occurred.
  4. Listener: A listener is an object that is “waiting” for event to occur and can respond in some way when it does.

 

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