Java Programming

great day to everyone.

i have just finished creating a program which will compute 5 numbers with decimal points.

our professor asked us to modify. i have no idea how it will diplay an output with only 2 decimal places (as it will automatically round off the output) even if you enter a number with infinite decimals.

here's the program and it works:

import javax.swing.*;
public class Five {
public static void main ( String args[] )
{
String firstNumber, secondNumber, thirdNumber, fourthNumber, fifthNumber;
double num1=0, num2=0, num3=0, num4=0, num5=0, sum;
firstNumber=JOptionPane.showInputDialog("Enter first number");
secondNumber=JOptionPane.showInputDialog("Enter second number");
thirdNumber=JOptionPane.showInputDialog("Enter third number");
fourthNumber=JOptionPane.showInputDialog("Enter fourth number");
fitthNumber=JOptionPane.showInputDialog("Enter fifth number");

num1=Dopuble.parseDouble(firstNumber);
num2=Dopuble.parseDouble(secondNumber);
num3=Dopuble.parseDouble(thirdNumber);
num4=Dopuble.parseDouble(fourthNumber);
num5=Dopuble.parseDouble(fifthNumber);

sum=num1+num2+num3+num4+num5;

JOptionPane.showInputDialog(null,"The sum is"+sum, "Results",JOptionPane.PLAIN_MESSAGE);
System.exit(0);
}
}


any help from anyone will be gladly appreciated.

thanks very much in advanced. god bless everyone.

love, peace, equality.