A CS lecturer from Stanford, namely Nick Parlante, has created this site: http://www.javabat.com/ . It is a neat idea to get the students going and test out their java skills online. He describes some sample problems and gives the users a place to put their codes. Upon completion, the user can submit their code and run tests against expected results. Definitely recommended for people who are learning java.
Just installed Debian 4.0 (etch) on my laptop (clean net install) and fixed all my development environment there. But surprisingly I found that none of the gwt sample application, and my gwt applications were running on the bundled hosted browser provided with GWT. I was getting an error relating to: java.lang.UnsatisfiedLinkError .
The following two commands solved the problem. May be helpful for someone else searching for solution.
apt-get install libstdc++5
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/gwt-linux-1.3.3/mozilla-1.7.12