java - Deploying an EJB easily -

i may being naive here, assumption ejb 3, marking class @stateful required make stateful session bean.

my question: can deploy is, , if how? or still need package in ear. think annotation sufficient, may being over-optimistic.

thanks in advance help.

annotation detailing out beans in xml file. should still packed in jar file go in ear. annotation substitution of xml configuration files.