To print real numbers with 2 digits to the right of the decimal point, 
do the following:

At the beginning of your program, place the following import statement -

import java.text.DecimalFormat;


In your main method, preferably in the same section of code where your programs
variables are declared, place the following definition:

DecimalFormat twoDigits = new DecimalFormat("0.00");

This creates a reference to a DecimalFormat object, called twoDigits, 
which is used to print real numbers with two places to the right of the 
decimal point. 

Suppose you have a double variable called average. To print the variable 
average with two places to the right of the decimal point, the statement 
would be:

System.out.println("Average is "+twoDigits.format(average));