Review

class LocaleUtils {
    /**
     * <p>Obtains the list of countries supported for a given language.</p>
     * 
     * <p>This method takes a language code and searches to find the
     * countries available for that language. Variant locales are removed.</p>
     *
     * @param languageCode  the 2 letter language code, null returns empty
     * @return an unmodifiable List of Locale objects, never null
     */
    public static List countriesByLanguage(String languageCode) {
        List countries = (List) cCountriesByLanguage.get(languageCode);  //syncd
        if (countries == null) {
            if (languageCode != null) {
                countries = new ArrayList();
                List locales = availableLocaleList();
                for (int i = 0; i < locales.size(); i++) {
                    Locale locale = (Locale) locales.get(i);
                    if (languageCode.equals(locale.getLanguage()) &&
                            locale.getCountry().length() != 0 &&
                            locale.getVariant().length() == 0) {
                        countries.add(locale);
                    }
                }
                countries = Collections.unmodifiableList(countries);
            } else {
                countries = Collections.EMPTY_LIST;
            }
            cCountriesByLanguage.put(languageCode, countries);  //syncd
        }
        return countries;
    }

}