How to get NumberFormat instance from currency code?

Question

How can I get a NumberFormat (or DecimalFormat) instance corresponding to an ISO 4217 currency code (such as \"EUR\" or \"USD\") in order to format

Answer 1

The mapping is sometimes one to many... Like the euro is used in many countries (locales)...

Just because the currency code is the same the format might be different as this example shows:

private static Collection getLocalesFromIso4217(String iso4217code) {
    Collection returnValue = new LinkedList();
    for (Locale locale : NumberFormat.getAvailableLocales()) {
        String code = NumberFormat.getCurrencyInstance(locale).
        getCurrency().getCurrencyCode();
        if (iso4217code.equals(code)) {
            returnValue.add(locale);
        }
    }  
    return returnValue;
}

public static void main(String[] args) {
    System.out.println(getLocalesFromIso4217("USD"));
    System.out.println(getLocalesFromIso4217("EUR"));
    for (Locale locale : getLocalesFromIso4217("EUR")) {
        System.out.println(locale + "=>" + NumberFormat.getCurrencyInstance(locale).format(1234));
    }
}

Output

[en_US, es_US, es_EC, es_PR]
[pt_PT, el_CY, fi_FI, en_MT, sl_SI, ga_IE, fr_BE, es_ES, de_AT, nl_NL, el_GR, it_IT, en_IE, fr_LU, nl_BE, ca_ES, sr_ME, mt_MT, fr_FR, de_DE, de_LU]

pt_PT=>1.234,00 €
el_CY=>€1.234,00
fi_FI=>1 234,00 €
en_MT=>€1,234.00
sl_SI=>€ 1.234
ga_IE=>€1,234.00
fr_BE=>1.234,00 €
es_ES=>1.234,00 €
de_AT=>€ 1.234,00
nl_NL=>€ 1.234,00
el_GR=>1.234,00 €
it_IT=>€ 1.234,00
en_IE=>€1,234.00
fr_LU=>1 234,00 €
nl_BE=>1.234,00 €
ca_ES=>€ 1.234,00
sr_ME=>€ 1.234,00
mt_MT=>€1,234.00
fr_FR=>1 234,00 €
de_DE=>1.234,00 €
de_LU=>1.234,00 €