listener

[sandeep Talari]

summary regarding "Listeners" . What are these Listeners in java . What is the main purpose these Listeners. What i have to understand blindly about listeners. Explain me in details

[Amit Ghorpade]

A listener is a class which is notified when the event it is listening to occurs.
Find out more at the ServletsFaq.




Hope this helps .

[Sagar Rohankar]

Originally posted by sandeep Talari:
summary regarding "Listeners" . What are these Listeners in java . What is the main purpose these Listeners. What i have to understand blindly about listeners. Explain me in details

This question is more like Java Beginner

and a googled it, you ll find hundreds of useful links !!
[ July 17, 2008: Message edited by: Bear Bibeault ]

[Rahul Shilpakar]

Listeners are always ready to listen any event happen on its components and its changes.

[Campbell Ritchie]

Like most things, there is something useful about it in the Java Tutorials.

[Mandar Khire]

In simple (few)words i try to answer of What are these Listeners in java? I read it in J2CR(Java 2 The Complete Reference)book.
First we should understand event:- An Event is an object that describes a state change in a source. & A Source is an object that generates an event.
A source must register listeners in order for the listeners to receive notifications about a specific type of event.
Here is the general form:-
public void add Type Listener(TypeListener el)
here Type is the name of event & el is La reference to the event listener.
The listener is an object that is notified when an event occurs.
I not write all things here but
try these link:-
{Listeners in Java}.
{Listeners in Java}.