What are the state of the object in the Hibernate?

 There  are three  state  in Hibernate 

   a). Transient State  

          b). Persistent State  

          c). Detached State

1. Transient State:

 A New instance of  a persistent class which is not associated with a Session, has no representation in the database and no identifier value is considered transient by Hibernate:

UserDetail user = new UserDetail();

user.setUserName("bhringi");

Note- user is in a transient state

   2. Persistent State:
 A persistent instance has a representation in the database , an identifier value and is associated with a Session. You can make a transient instance persistent by associating it with a Session:

Long id = (Long) session.save(user);

Note- user is now in a persistent state

3.   Detached State:
 

      Now, if we close the Hibernate Session, the persistent instance will become a detached instance: it  isn't attached to aSession anymore (but can still be modified and reattached to a new Session later though).

session.close();

Note--user in detached state