Any tips on printing out "coinTotal" displayed up to second decimal point?

package com.javaprojects;

// import packages
import java.util.Scanner;
import java.text.DecimalFormat;

public class Main {

    /* The program below is a coin counter that prompts a user to enter the amount of coins
    that they have. The program then stores the count in variables, produces a sum and returns
    the total in dollars.
    */

    // declare private static java.text.DecimalFormat
    private static DecimalFormat df2 = new DecimalFormat(".##");

    public static void main(String[] args) {

        // declare variables
        Scanner stdin;
        double quarters;
        double dimes;
        double nickels;
        double pennies;
        double coinTotal;

        // assign values to variables after prompting user to enter coin counts
        stdin = new Scanner (System.in);
        System.out.println("How many quarters do you have?");
        quarters = stdin.nextDouble() * 0.25;
        System.out.println("How many dimes do you have?");
        dimes = stdin.nextDouble() * 0.10;
        System.out.println("How many nickles do you have?");
        nickels = stdin.nextDouble() * 0.05;
        System.out.println("How many pennies do you have?");
        pennies = stdin.nextDouble() * 0.01;
        coinTotal = quarters + dimes + nickels + pennies;

        // print statement containing the result
        System.out.println("You have $" + coinTotal);


    } // end main
} // end class