Isn't most of swing built on top of AWT, so essentially if you use swing you're using both.

Sorry for the mistakes and misunderstanding. What I meant is the GUI components such as the button, menu, label etc.. Which one do you prefer to/usually use when developing any applications/applets?

Use Swing components most of the time
OR
Use AWT components most of the time
OR
Both(Sometimes use AWT components and sometimes use Swing components)