Java tutorial
//package com.java2s; import java.util.HashMap; import java.util.Locale; import java.util.Map; public class Main { private static String loc = "es_AR"; private static Map<String, String> initCountries() { Map<String, String> countries = new HashMap<String, String>(); for (String iso : Locale.getISOCountries()) { Locale l = new Locale(loc, iso); countries.put(l.getDisplayCountry(), iso); } return countries; } }