public TemperatureSet(String stationId, HashMap<String, String> minSet, HashMap<String, String> maxSet, BufferedWriter out)
  {
    _stationId = stationId;
    
    for (String s : minSet.keySet())
    {
      TemperatureDate td = new TemperatureDate();
      if (minSet.get(s) != null) td._min = Float.parseFloat(minSet.get(s));
      _dateList.put(s, td);
    }
    
    for (String s : maxSet.keySet())
    {
      TemperatureDate td = _dateList.get(s);
      
      if (td == null) td = new TemperatureDate();
      
      if (maxSet.get(s) != null) td._max = Float.parseFloat(maxSet.get(s));
    }
    
    write(out);
  }