Applet/Swing(how should i)

[Mazhar M Shaikh]

Dear all,
My applet is divided into two panels.On the left Panel i need to have list of swings components.I should be able to drag and drop these components on the left pane.This i can accomplish with the drag and drop techology from jfc.But further i still want to provide more user friendly interaction with my components.As i click on an option on the left pane,immediately below the option i should get another suboptions.Which i should be able to select and use it in right pane.
Can you provide me a solution for this problem or forward me to best available tutorials.Or to be more precise is their any source available to implement it.
Thanx
Regards