Formatting Currencies in Foreign Locales in Java

Try using setCurrency on the instance returned by getCurrencyInstance(Locale.GERMANY)

Broken:

java.text.NumberFormat format = java.text.NumberFormat.getCurrencyInstance(java.util.Locale.GERMANY);System.out.println(format.format(23));

Output: 23,00 €

Fixed:

java.util.Currency usd = java.util.Currency.getInstance("USD");java.text.NumberFormat format = java.text.NumberFormat.getCurrencyInstance(java.util.Locale.GERMANY);format.setCurrency(usd);System.out.println(format.format(23));

Output: 23,00 USD

I would add to answer from les2 https://stackoverflow.com/a/7828512/1536382 that I believe the number of fraction digits is not taken from the currency, it must be set manually, otherwise if client (NumberFormat) has JAPAN locale and Currency is EURO or en_US, then the amount is displayed 'a la' Yen', without fraction digits, but this is not as expected since in euro decimals are relevant, also for Japanese ;-).

So les2 example could be improved adding format.setMaximumFractionDigits(usd.getDefaultFractionDigits());, that in that particular case of the example is not relevant but it becomes relevant using a number with decimals and Locale.JAPAN as locale for NumberFormat.

    java.util.Currency usd = java.util.Currency.getInstance("USD");    java.text.NumberFormat format = java.text.NumberFormat.getCurrencyInstance(          java.util.Locale.JAPAN);    format.setCurrency(usd);    System.out.println(format.format(23.23));    format.setMaximumFractionDigits(usd.getDefaultFractionDigits());    System.out.println(format.format(23.23));

will output:

USD23USD23.23

In NumberFormat code something similar is done for the initial/default currency of the format, calling method DecimalFormat#adjustForCurrencyDefaultFractionDigits. This operation is not done when the currency is changed afterwards with NumberFormat.setCurrency

import java.util.*;import java.text.*;public class Solution {    public static void main(String[] args) {        Scanner scanner = new Scanner(System.in);        double payment = scanner.nextDouble();        scanner.close();        NumberFormat lp;  //Local Payment        lp = NumberFormat.getCurrencyInstance(Locale.US);        System.out.println("US: " + lp.format(payment));        lp = NumberFormat.getCurrencyInstance(new Locale("en", "in"));        System.out.println("India: " + lp.format(payment));        lp = NumberFormat.getCurrencyInstance(Locale.CHINA);        System.out.println("China: " + lp.format(payment));        lp = NumberFormat.getCurrencyInstance(Locale.FRANCE);        System.out.println("France: " + lp.format(payment));    }}