DAo with list example

 @SuppressWarnings("unchecked")
    public List<Academic> ProfileAcademicListByUserId(String user_id) {
        s = sf.openSession();
        Transaction t = s.beginTransaction();

        List<Academic> academiclist = null;
        try {
            academiclist = s.createQuery("from Academic where user_id='" + user_id + "'").list();
        } catch (HibernateException HE) {
            System.out.println(HE);
        }
        t.commit();
        s.close();
        sf.close();
        return academiclist;
    }