code: public TimeUnit getTimeUnit(int field)
     {
        TimeUnit result;
  
        if ((field < m_fields.length) && (m_fields[field].length() != 0))
        {
           result = TimeUnit.getInstance(Integer.parseInt(m_fields[field]));
        }
        else
        {
           result = TimeUnit.DAYS;
        }
  
        return (result);
     }
docs: Accessor method used to retrieve an Integer object representing the
  contents of an individual field. If the field does not exist in the
  record, null is returned.
  
  @param field the index number of the field to be retrieved
  @return the value of the required field