public String callCommandGetField(PreparedStatement _sqlCommand, Connection _con)
    {
        //Benchmark time start
        ThreadMXBean threadmxbean = ManagementFactory.getThreadMXBean();
        long startTime;
        long finishTime;

        if (_enableSqlMonitor)
            startTime =  threadmxbean.getCurrentThreadCpuTime();

        String returnVal = "";
        ResultSet listData = null;
        try
        {
            listData = callCommandGetResultSetWithOutMonitor(_sqlCommand, _con);
            if (listData != null && listData.next())
            {
                returnVal = listData.getString(1);
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            close(listData, null, null);
        }

        if (_enableSqlMonitor)
        {
            finishTime = threadmxbean.getCurrentThreadCpuTime();
            sqlMonitor((finishTime-startTime), "callCommandGetField()");
        }

        return returnVal;
    }