Once I commit the transaction, can I keep referencing the hibernate object only in read-only mode.

For example :
RepositoryIntf<User> repo = new Repository<User>(User.class);
Transaction tx = HibernateUtil.getTransaction();
User u = new User();
u.setLoginId("abc");
repo.save(u);
tx.commit();


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Can I continue accessing this object "u" after commit or it has a life time after which object gets destroyed automatically.
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What would be the best way if I want take the User object "u" to view.

Object does not get destroyed at all. You can reference it as much as you want. It is how Java works. If you want to make sure object is not changed by you accidentally you may want to use "evict" on it.