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  1. #1
    MrPosotive is offline Member
    Join Date
    Sep 2012
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    Default I need help rounding

    I really have no clue on how to round. I Need to be able to round up to the nearest hundredth for a program im making for my APCS class so if you guys could help me out, here is the code i already wrote if you need it for whatever reason.
    Java Code:
    import java.util.Scanner;
    public class Prog93a
        public static void main(String args[])
            Scanner a = new Scanner(;
            System.out.println("Please imput how many Kilo watts used...");
            double aa = a.nextDouble();
            double cost = 0.0475;
            double baseCharge = aa * cost;
            double cityTax = .03 * baseCharge;
            double surecharge = .10 * baseCharge;
            System.out.println("C O M P S C I Electric");
            System.out.println("Kilowatts Used " + aa + " @ $ " + cost);
            System.out.println("Base Charge $" + baseCharge);
            System.out.println("Surcharge $" + surecharge);
            System.out.println("Citytax $" + cityTax);
            System.out.println("Pay this ammount $" + surecharge + baseCharge + cityTax);
            System.out.println("After May 20th Pay $" + (surecharge + baseCharge + cityTax) / .04);

  2. #2
    huupderitis is offline Member
    Join Date
    Sep 2012
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    Default Re: I need help rounding

    I'm new to programming as well, however I know that the Math Class in the Java API should help you tremendously. It contains a method Math.Round();

    Let's see... Java Platform SE 6

    Go down and have a look at round... it seems to work for doubles and floating point numbers... Not really sure how to change which place it will round to though!

  3. #3
    Reeling is offline Member
    Join Date
    Jan 2012
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    Default Re: I need help rounding

    Check out DecimalFormat and the roundingMode associated with it.

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