Hi,

In POJO (Plain Old Java Object) class object there are three types of states i.e. Transient state, Persistent state and Detached state. In PoJo is a programming model that adopt some simple rules to create a classes that applies the entities of the business problem. The Pojo Class is Implement a default (no-argument) constructor, Give(optional) an identifier property, prefer(optional) a non-final classes etc.

For clear concepts about Pojo of hibernate visit below link:

http://www.roseindia.net/hibernate/hibernate4/hibernateCreatePojoClass.shtml

Thanks,