private List<String> countriesList = new ArrayList<String>();

public List<String> getCountriesList() {

        String[] locales = Locale.getISOCountries();

        for (String countryCode : locales) {

            Locale obj = new Locale("", countryCode);
            countriesList.add(obj.getDisplayCountry(Locale.FRENCH));

        }
    return countriesList;
}

Collections.sort(countriesList, new Comparator<String>() {
    @Override
    public int compare(String str1, String Str2)
    {
        return  str1.compareTo(str2);
    }
});

List<String> countriesList = new ArrayList<String>();



        String[] locales = Locale.getISOCountries();

        for (String countryCode : locales) {

            Locale obj = new Locale("", countryCode);
            countriesList.add(obj.getDisplayCountry(Locale.FRENCH));
            Collections.sort(countriesList);
            }
        for(String s:countriesList)
        {
            System.out.println(s);
        }

private List<String> countriesList = new ArrayList<String>();

 public List<String> getCountriesList() {

    String[] locales = Locale.getISOCountries();

    for (String countryCode : locales) {

        Locale obj = new Locale("", countryCode);
        countriesList.add(obj.getDisplayCountry(Locale.FRENCH));

    }
return Collections.sort(countriesList);
}