how to retrieve column values from query

List<G_DriverStatus> res = this.getJdbcTemplate().query("select driverid,drivername,min(timedelay) as timedelay from driver_status group by driverid,drivername", new DriverStatusMapper());

<pre lang="xml">private class DriverStatusMapper implements RowMapper<G_DriverStatus>{
        public G_DriverStatus mapRow(ResultSet rs,int i) throws SQLException{
            G_DriverStatus g=new G_DriverStatus();
            g.setDriverid(rs.getString("driverid"));
            g.setDrivername(rs.getString("drivername"));
            g.setTimedelay(rs.getBigDecimal("timedelay"));
            return g;
        }
    }