import java.util.*;

public class Decimales {

  public static void main(String[] args) {

    test("de", "DE", 1234.56);

    test("en", "US", 1234.56);

    test("es", "ES", 1234.56);

    test("fr", "FR", 1234.56);

    test("it", "IT", 1234.56);

    test("pt", "PT", 1234.56);

  }

  private static void test(String idioma, String pais,

                           double n) {

    Locale locale= new Locale(idioma, pais);

    System.out.println(String.format(locale,

        "%s: %,.2f",  locale, n));

  }

}

de_DE: 1.234,56

en_US: 1,234.56

es_ES: 1.234,56

fr_FR: 1á234,56

it_IT: 1.234,56

pt_PT: 1.234,56