Java 8 does not display currency symbol

Question

I found one strange situation in Java 8. I am going to format the number to a specific locale, and some of them work incorrectly.

long tenMillion = 10000000L; // this is ten million
Locale[] locales = Locale.getAvailableLocales();
//Locale[] locales = NumberFormat.getAvailableLocales(); // the same situation
for (Locale locale : locales) {
String currency = "Ten million in " + locale.getDisplayName() + "  is " +
                NumberFormat.getCurrencyInstance(locale).format(tenMillion);
    if (locale.getDisplayName().equals("Ukrainian")){
        System.out.println(currency);
        System.out.println(Currency.getInstance("UAH").getSymbol(locale));
    }
}

Exit

Ten million in Ukrainian  is ¤ 10 000 000,00
UAH

But when I create an instance of this location, I have the correct results:

Locale uaLoc = new Locale("uk", "UA");
String currency = "Ten million in " + uaLoc.getDisplayName() + "  is " +
        NumberFormat.getCurrencyInstance(uaLoc).format(tenMillion);
System.out.println(currency);
System.out.println(Currency.getInstance("UAH").getSymbol(uaLoc));

Exit

Ten million in Ukrainian (Ukraine)  is 10 000 000 .
.

This is true not only for the Ukrainian language and for others:

Ten million in Bulgarian  is ¤ 10 000 000,00
Ten million in Italian  is ¤ 10.000.000,00
Ten million in Korean  is ¤ 10,000,000.00
Ten million in Latvian  is ¤ 10 000 000,00
etc.

But locales with countries are formatted correctly:

Ten million in Bulgarian (Bulgaria)  is .10 000 000
Ten million in Italian (Italy)  is € 10.000.000,00
Ten million in Italian (Switzerland)  is SFr. 10'000'000.00
Ten million in Korean (South Korea)  is ￦10,000,000
Ten million in Latvian (Latvia)  is 10 000 000 €

It seems that the currency is only associated with the country. And this is a very correct way!

Does anyone know how to request API changes for Java 9? It would be great to follow the API

Locale.getAvailableCountryLocales(); 

to avoid misunderstandings.

thanks

Answer 1

: : http://openjdk.java.net/jeps/1 ( ), , , . ( , " ".

, JCP Public, , JCP, Java Specification Agreement ( : . JSPA-pdf URL-).

: https://jcp.org/en/participation/overview

Answer 2

. java 8

filter(List<LanguageRange> priorityList,Collection<Locale> locales)

RFC 4647

List<Locale.LanguageRange> list1 = new ArrayList<>();
list1.add(new Locale.LanguageRange("*-*"));
// Locales
List<Locale> list3 = Locale.filter(list1,Arrays.asList(Locale.getAvailableLocales()));
list3.forEach(System.out::println);

:

ar_AE
ar_JO
ar_SY
hr_HR
fr_BE
es_PA
mt_MT
es_VE
zh_TW
da_DK
es_PR
vi_VN
en_US
etc.

, -.

Answer 3

Locale.getAvailableLocales() ,

• ,
• .

:

it, : Italian
it, CH: Italian (Switzerland)
it, IT: Italian (Italy)

ucrainian , Locale("uk"), - Locale("uk", "UA").

, , , + .

 if (locale.getDisplayName().startsWith("Ukrainian")){

ucrainian , , .