This week's book giveaway is in the Web Services forum.
We're giving away four copies of Microservices in Action and have Morgan Bruce & Paulo A. Pereira on-line!
See this thread for details.
Win a copy of Microservices in Action this week in the Web Services forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
  • Campbell Ritchie
  • Bear Bibeault
  • Devaka Cooray
  • Liutauras Vilda
  • Jeanne Boyarsky
  • Knute Snortum
  • Junilu Lacar
  • paul wheaton
Saloon Keepers:
  • Ganesh Patekar
  • Frits Walraven
  • Tim Moores
  • Ron McLeod
  • Carey Brown
  • Stephan van Hulst
  • salvin francis
  • Tim Holloway

Event Handling  RSS feed

Ranch Hand
Posts: 35
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
hello everybody.
i am facing some problems in event handlig. please help me regarding event generation,listener and and action performed.
how the flow moves from event source to listener and then to corresponding action.

Ranch Hand
Posts: 38
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
At the first place you need to understand that with Java 2 , The event model has changed to Event Delegation model.
The model has got three diff. entities, One The Event, Event Source, Listener.
The Event Source (For Eg. Button) is an object in a awt, which will generate a event. Yes Event in Java are represented in the form of a object.
The Listener has to register with the Event Source in order to receive the notification of an event having occured. The registration can be done using Add.... Method available in the AWT object.
Also note that Java has provided Listener in a form of interface, hence to start with you did create a class and implement the interface in the class. The interface methods will receive the event object as a parameter in the methods.
Of Course there are more sophisticated ways of handling events, Like for eg. Adapters. But for beginners I think you need to start with implementing listener interfaces.
Tushar Kansara
Consider Paul's rocket mass heater.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!