Java Currency Number format

Question

Is there a way to format a decimal as following:

100   -> "100"   100.1 -> "100.10" 

If it is a round number, omit the decimal part. Otherwise format with two decimal places.

Answer 1

I'd recommend using the java.text package:

double money = 100.1; NumberFormat formatter = NumberFormat.getCurrencyInstance(); String moneyString = formatter.format(money); System.out.println(moneyString); 

This has the added benefit of being locale specific.

But, if you must, truncate the String you get back if it's a whole dollar:

if (moneyString.endsWith(".00")) {     int centsIndex = moneyString.lastIndexOf(".00");     if (centsIndex != -1) {         moneyString = moneyString.substring(1, centsIndex);     } }