Yes, you are missing something - download a JDK from the Sun web site: java.sun.com. The libgcj JDK is inadequate for running any serious Java apps. Using apt, you can search for and get the Sun JRE fro the repository. But I am not sure if the IDE bundle will be happy with just a JRE. You could also look into downloading the OpenJDK (if you are running Ubuntu 8.04), it might do the job also (not sure of the package name). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4150540#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...