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

  1. #1
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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();
    number.setMaximumFractionDigits(1);
    String mileString = number.format(miles);
    System.out.println(message);
    }
    }
    }


  2. #2
    Super Moderator Norm's Avatar
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    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
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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