How to find which Java libs needed

["W. van den Akker" <listsrv@wilsoft.nl>]

Hi,

I have a JAVA package using the ANT build suite.
How can I find out which libraries are needed for compiling?
I have solved a bunch but a few are to be found.

Is there a easy way? Or is it a try and shoot method?
This is my first Java package. So any help is appreciated. 

Greetings,
Willem