As I understand the EJB 3.0 API does not come on a standard JSE download.In the Sun official page there is a download of a file ejb-3_0-api.jar, my question is: where do I put it?Thanks.
If you have downloaded JBoss, then the relevant jars already come shipped with it. You can find them in %JBOSS_HOME%\server\< serverName>\lib folder (ex: the jboss-ejb3x.jar in this folder)