public Contact getContactById(int id) {

    Contact contact=null;
    Session session = sessionFactory.openSession();
     Transaction transaction = session.beginTransaction();
     Query query = session.createQuery("from Contact where id=:id");
     query.setParameter("id",id);
     List<Contact> list = query.list();
     transaction.commit();
     if(!list.isEmpty())
     {
         contact=list.get(0);
     }
     return contact;
}

i want o specific contact object related to id