double money = 100.1;
NumberFormat formatter = NumberFormat.getCurrencyInstance();
String moneyString = formatter.format(money);
System.out.println(moneyString);double currencyAmount = 1500.00;
// Create a new Locale
Locale usa = new Locale("en", "US");
// Create a Currency instance for the Locale
Currency dollars = Currency.getInstance(usa);
// Create a formatter given the Locale
NumberFormat dollarFormat = NumberFormat.getCurrencyInstance(usa);
// Format the Number into a Currency String
System.out.println(dollars.getDisplayName() + ": " + dollarFormat.format(currencyAmount));NumberFormat numberFormat = NumberFormat.getCurrencyInstance(locale);
//the user may have selected a different currency than the default for their locale
Currency currency = Currency.getInstance("GBP");
numberFormat.setCurrency(currency);
numberFormat.format(amount);