code: public static String getISO3Country(String country){
  
          int offset = findIndex(_countries, country);
          if(offset>=0){
              return _countries3[offset];
          }else{
              offset = findIndex(_obsoleteCountries, country);
              if(offset>=0){
                  return _obsoleteCountries3[offset];
              }
          }
          return "";
      }
docs: Returns a three-letter abbreviation for the provided country.  If the provided
  country is empty, returns the empty string.  Otherwise, returns
  an uppercase ISO 3166 3-letter country code.
  @exception MissingResourceException Throws MissingResourceException if the
  three-letter country abbreviation is not available for this locale.