I'm looking for a Java open source project for an academic study on test cases. I need a project with 20-40 KLOC and at least a 100 JUnit tests. A project that was developed using TDD methodology is prefered. Something that I can drop in eclipse and run all the tests with minimal overhead for setups.
Any recommendations?
It's amusing that you say "drop in eclipse", as some parts of eclipse were written with TDD and have relatively large numbers of LOC. You may want to go that route. I know, for example, that the Eclipse-based FORTRAN IDE project is one such endeavor.
The Spring framework? May be too large perhaps.
There are any number of projects you can use. You could look at the BouncyCastle encryption library. http://bouncycastle.org/java.html
To help with your search, you could have a look at Koders (http://koders.com/), the source code search engine. They have information about LOC for open source projects.