Last week, we had the author of TDD for a Shopping Website LiveProject. Friday at 11am Ranch time, Steven Solomon will be hosting a live TDD session just for us. See for the agenda and registration link
The java.util.zip package helps with Zip files. Check out the ZipFile class, particularly the getEntry and getInputStream methods, which will get you access to a particular file inside the Zip file. Once you have an InputStream, it should be easy to get at its second line.