I've been turned on to the Apache IO package here, so have downloaded it.
Yet, not wanting to clutter up my project with more stuff than I need, but simultaneously not wanting to omit necessary bits, I want to know just which jar file or files I need to add. There are several:
Based on what I found here, adding the .jar[s] should go smoothly, but which one[s] do I need?
Is commons-io-2.4.jar enough? Is commons-io-2.4-sources.jar enough? Both of them? Or...???