Przykład

public static void main( String[] args) {
double value = 12345.678;
Locale defaultLocale = Locale.getDefault();
NumberFormat nf = NumberFormat.getCurrencyInstance(defaultLocale);
String formattedValue = nf.format(value);
System.out.println(formattedValue);
}
Rozwiązanie
Użyj klasy com.ibm.icu.util.Currency (ICU 2.6.1) lub java.util.Currency
  1. Wywołaj metodę
    Currency.getInstance (java.lang.String)
  2. Wywołaj metodę
    java.text.NumberFormat.setCurrency (java.util.Locale)

public static void main(String[] args) {
double value = 12345.678;
Currency currency = Currency.getInstance("EUR"); //$NON-NLS-1$
Locale defaultLocale = Locale.getDefault();
NumberFormat nf = NumberFormat.getCurrencyInstance(defaultLocale);
nf.setCurrency(currency);
String formattedValue = nf.format(value);
System.out.println(formattedValue);
}