Java Open Source Projects?

[killerabbit]

Hello all, this seems like the best place to pose this question. I am learning Java, and I would like to help contribute / learn from an open source project. So if there are any good small open source projects that you guys know of that would be great.

Thanks!

[NoaHall]

http://java-source.net/

Go crazy.

[Queue29]

Come motivate yourself to learn some path finding algorithms.

http://csclub.uwaterloo.ca/contest/index.php

[Firestem4]

freemind.sourceforge.net is a pretty cool java based project.

I'm also learning Java (just beginning). I plan to eventually contribute to some projects too =)

[alfplayer]

Android smartphones are big these days... so, how about an Android app? They are not big especially compared to desktop apps. It's not the same as programming for the desktop but it's still Java.

[killerabbit]

Thanks for the help. I'll check them out.

[samjh]

A lot of Java open-source projects are related to web applications.

You've also got Eclipse (http://www.eclipse.org), Netbeans (http://www.netbeans.org), LimeWire (http://www.limewire.com/en), Azureus (now known as Vuze) (http://azureus.sourceforge.net/), JMonkeyEngine (http://www.jmonkeyengine.com/), and Apache's (http://www.apache.org/) various Java projects (eg. Maven, Tomcat), to name just a handful.