These pages about different languages / apis / best practices were mostly jotted down quckily and rarely corrected afterwards.
The languages / apis / best practices may have changed over time (e.g. the facebook api being a prime example), so what was documented as a good way to do something at the time might be outdated when you read it (some pages here are over 15 years old).
Just as a reminder.
To get a decent environment setup quickly: http://lomboz.objectweb.org/downloads/drops/R-3.1.2-200602261400/instructions.html http://roseindia.net/ejb/ejbtutorial/building_a_simple_ejb_application.shtml
More programming related pages