Question

How would you use a particular cell in excel as input in a java program

Answer 1

I'm not entirely sure about this one. I suspect there's probably some library out there that does this for you?

Of course, you could always try converting the file to a different format that is easier to read from Java.

Answer 2

Yes you can with Java Excel API, it's A Java API to read, write, and modify Excel spreadsheets;

Try this link:
jexcelapi.sourceforge.net

There are tutorial in down the page.

Good Luck