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Sagar Dabas
Ranch Hand

Joined: Nov 15, 2011
Posts: 47

Does event sources are registered with only one object of a listener? No new listener's object is created every time when a user clicks a button.

This program appends the string with a new incremented character when user clicks on the button.
'build' is the instance variable of the listener class. 'build' remembers its previous value and appends the new value when user clicks the button that means no new listener object is created. Only the function actionPerformed() is invoked on the same object..

Am I correct ?

Live Curious!!!
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 43295
Yes, I think you are correct.
I quite enjoyed running your little application with abcde
Sagar Dabas
Ranch Hand

Joined: Nov 15, 2011
Posts: 47

It is sorta covered in the JavaRanch Style Guide.
subject: Listeners
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