JDOM is available as jdom-1.1-tar.gz. If it is un-tarred under /usr it installs in
/usr/jdom-1.1. Similarly, jdom-contrib and jdom-test are installed in /usr/jdom-contrib-1.1
and /usr/jdom-test-1.1 respectively. After this if ./build.sh is run in jdom-contrib-1.1 or
jdom-test-1.1, Class not found exception for org.apache.tools.ant.Main results. The reason is that
the build.sh under jdom-contrib and jdom-test expects a ../jdom/lib, whereas jdom has been installed
under ../jdom-1.1. The solution is to link jdom-1.1 to jdom, that is,
cd /usr
ln -s jdom-1.1 jdom