Extending a Swing component

Hi all,
In lot of Swing samples I see that a component, say, JFrame being extended. The extending class simply sets the properties or adds children to the super class. This is a not proper way, right? What is the purpose of extension if you are not modifying the behavior of the superclass?

Thanks,
Ganesh

Why do you think it is not the right way?
By overriding, you can modify the behavior.

It is not a proper way because the subclass is simply making use of superclass. It is not modifying any behavior of the superclass

That is correct is not the proper way to create a frame. Most examples do it out of lazyness. It you want to see a better approach look at the examples in the Swing tutorial.

Can you please provide the link to Swing tutorial?

Try www.google.com
Searching for "swing tutorial" usually works

Ok. Thanks Maneesh