Hi sai,
If am right, you are talking about Container call back methods. If we are speaking the same language. The are methods, the container uses to manage your
beans, they can't be be called directly by a client, but could be called as a response to a client method calls. The are inherited from the interface you implements. eg for a session bean we have
setSessionContext();
ejbCreate(); // called when a client calls create() on home interface
ejbPassivate();
ejbActivate();
ejbRemove();
Notice the all have
ejb in their names and must be implemented by the bean provider.
Hope it helps.