I am trying to only display at most two decimal digits.

Question

I am writtng a java app that computes an energy bill, but the computations are only supposed to display two decimals digits at the most.
here is my code, I am trying to find a way to only display the two digits after the decimal in the answer (print statement). I was thinking that I could use a string method or something.
import java.util.Scanner;
public class EnergyCost
public static void main(String[] args)
final double UsageRate = 0.0942;
final double PowerRate = 0.0075;
final double FuelFactor = 0.0001403;
final double TaxRate = 0.082;
int KiloHour;
double EnergyCharge, PowerCost, FuelAdjust, TaxCharge, Total;
Scanner scan = new Scanner(System.in);
System.out.println("Hello! My name is David and I will be helping you today!"); /*Done for aesthetics*/
System.out.println("Please enter the umber of kilowatt-hours used last month: ");
KiloHour = scan.nextInt();
EnergyCharge = KiloHour * UsageRate; /*Calculates the energy charge*/
PowerCost = KiloHour * PowerRate; /*Calculates the power supply cost*/
FuelAdjust = KiloHour * FuelFactor; /*Calcuates the fuel factor adjustement*/
TaxCharge = ((EnergyCharge + PowerCost) -(FuelAdjust)) * ( TaxRate); /*Calculates the Dollar amount of tax*/
Total= ((EnergyCharge + PowerCost) -(FuelAdjust)) + (TaxCharge); /*Calculates the total eneergy cost*/
System.out.println("The Energy Charge is " + EnergyCharge);
System.out.println("The Total Energy Charges is " + Total);
}

Answer 1

> System.out.println("Hello! My name is David and
I will be helping you today!"); /*Done for
aesthetics*/
EnergyCharge = KiloHour * UsageRate; /*Calculates the
energy charge*/
PowerCost = KiloHour * PowerRate; /*Calculates the
power supply cost*/
FuelAdjust = KiloHour * FuelFactor; /*Calcuates the
fuel factor adjustement*/
Do you think these comments add anything to your
code? Also; by convention, variable names should
start with lower-case letters.
I was told that comments are a good thing, and that I should get the habbit to comment as much as possible. It is also a major part of our grade. I was not aware the variable convention. You will have to excuse me but I am just starting. Thank you for letting me know that though.