Formatting numbers

It´s possible format numbers and dates using the java.text API.

Formatting a number is pretty simple. We use the DecimalFormat class to specify a custom format:

NumberFormat formatter1 = new DecimalFormat("#,###");
System.out.println(formatter1.format(123123))  // displays 123,123

NumberFormat formatter2 = new DecimalFormat("0.00");
System.out.println(formatter2.format(123123))  // displays 123123.00

NumberFormat formatter3 = new DecimalFormat("#,##0.00");
System.out.println(formatter3.format(123123.123))  // displays 123,123.12

There are a lot of patterns you could use to format numbers.
Just take a look at http://download.oracle.com/javase/tutorial/i18n/format/decimalFormat.html