How do I get all available currency codes?

The example presented in this code snippet show you how to get the available currency codes. We will need the locale information and use the Currency class for this example.

package org.kodejava.example.util;

import java.util.Currency;
import java.util.Locale;
import java.util.Map;
import java.util.TreeMap;

public class CurrencySymbolDemo {
    public static void main(String[] args) {
        CurrencySymbolDemo cs = new CurrencySymbolDemo();

        Map<String, String> currencies = cs.getAvailableCurrencies();
        for (String country : currencies.keySet()) {
            String currencyCode = currencies.get(country);
            System.out.println(country + " => " + currencyCode);

     * Get the currencies code from the available locales information.
     * @return a map of currencies code.
    private Map<String, String> getAvailableCurrencies() {
        Locale[] locales = Locale.getAvailableLocales();

        // We use TreeMap so that the order of the data in the map sorted
        // based on the country name.
        Map<String, String> currencies = new TreeMap<>();
        for (Locale locale : locales) {
            try {
            } catch (Exception e) {
                // when the locale is not supported
        return currencies;

You will have something like this printed on the screen:

Honduras => HNL
Hong Kong => HKD
Hungary => HUF
Iceland => ISK
India => INR
Indonesia => IDR
Iraq => IQD
Ireland => EUR
Israel => ILS
Italy => EUR

How do I change number format symbols?

You can use the DecimalFormatSymbols class to change the symbols that appear in the formatted numbers. These symbols include the decimal separator which can be changed using the setDecimalSeparator(), the grouping separator which can be change using the setGroupingSeparator() method. You can also alter the minus sign, and the percent sign, among others.

package org.kodejava.example.text;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Locale;

public class NumberFormatSymbol {
    public static void main(String[] args) {
        DecimalFormat formatter;
        String pattern = "###,###.##";
        double number = 123456.789;

        // Create a DecimalFormatSymbols object for United States
        // locale.
        DecimalFormatSymbols dfs = new DecimalFormatSymbols(Locale.US);

        // Create a format object with the given pattern without
        // change the locale dfs then format the given value.
        formatter = new DecimalFormat(pattern);
        String before = formatter.format(number);

        // Change the decimal separator and grouping separator symbol.

        // Create a format object with the given pattern and symbol
        // then format the given value.
        formatter = new DecimalFormat(pattern, dfs);
        String after = formatter.format(number);

        System.out.println("before: " + before + " | after: " + after);