This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
eclipse will ask you for "application directory" by showing this text:"/your_server_root/appservers/jboss"
just delete that text and browse for the jboss directory that you have in your system for example: