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Thread: NumberFormat class, rounding decimals (Beginner needs help!)

  1. #1
    Junior Member
    Join Date
    Sep 2012
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    Default NumberFormat class, rounding decimals (Beginner needs help!)

    Hey guys I'm a beginner at java and taking an online course this semester that I'm currently struggling on. I'd appreciate it if you guys could help me with my code. I need to use the NumberFormat class to round the average score to one decimal place before displaying it at the end of the program. In my book I followed the NumberFormat example, but I keep getting errors and I'm unsure why my project isn't running. I'm also unsure of where I should be putting the NumberFormat class. If someone could help me I would really appreciate it, thank you.

    import java.util.Scanner;

    public class TestScoreApp
    public static void main(String[] args)
    // display operational messages
    System.out.println("Please enter test scores that range from 0 to 100.");
    System.out.println("To end the program enter 999.");
    System.out.println(); // print a blank line

    // initialize variables and create a Scanner object
    double scoreTotal = 0;
    int scoreCount = 0;
    int testScore = 0;
    Scanner sc = new Scanner(System.in);

    // get a series of test scores from the user
    while (testScore != 999)
    // get the input from the user
    System.out.print("Enter score: ");
    testScore = sc.nextInt();

    // accumulate score count and score total
    if (testScore <= 100)
    scoreCount ++;
    scoreTotal += testScore;
    else if (testScore != 999)
    System.out.println("Invalid entry, not counted");

    // display the score count, score total, and average score
    double averageScore = scoreTotal / scoreCount;
    String message = "\n" +
    "Score count: " + scoreCount + "\n"
    + "Score total: " + scoreTotal + "\n"
    + "Average score: " + averageScore + "\n";
    if (testScore == 999)

    double miles = scoreTotal / scoreCount;
    NumberFormat number = NumberFormat.getNumberInstance();
    String mileString = number.format(miles);

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
    Thanked 2,465 Times in 2,416 Posts

    Default Re: NumberFormat class, rounding decimals (Beginner needs help!)

    I keep getting errors
    Please post the full text of the error messages.

    Please Edit your post and wrap your code with
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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