private void updateFilm(FilmBean film) {
        try {
            java.sql.Date date = new java.sql.Date(film.getReturnDate().getTime());
            String queryString = "update filme set borowerID = ?, returnDate = '?', "
                    + "renewal = ?  where id = ? ;";;
            PreparedStatement statement = this.db.createStatement(queryString);
            statement.setInt(1, film.getBorrowerID());
            statement.setDate(2, date);
            statement.setInt(3, film.getRenewals());
            statement.setInt(4, film.getId());
            statement.executeUpdate();
            /*
            String sql = "update filme set borowerID = "+film.getBorrowerID()+", "+
                    "returnDate = '" + date.toString()+"', "+
                    "renewal = " + film.getRenewals()
                    +"  where id = "+film.getId()+" ;";
            this.db.update(sql);
             */
        } catch (SQLException ex) {
            Logger.getLogger(FilmothekModel.class.getName()).log(Level.SEVERE, null, ex);
        }
    }