我的 Java 代码中的格式有什么问题？ [复制]

Question

最后有人告诉我，我的格式有问题。但是，我不知道那会是什么......错误消息在代码的末尾。 请不要对您的答案模棱两可，并告诉我要重点关注或审查的内容（如格式化）。我需要具体的改变。谢谢！！ 代码如下：

public static void main(String[] args)
{
    double pennies =  0.01;     //number of pennies
    double totalPennies = 0.01; //the variable that is added to 
    int maxDays;            //number of days the loop will double the pennies to
    int day = 0;                //the variable used to count each day in the loop

    //Create a String variable for user input with a console window. 
    String input;
    //Create a scanner object for keyboard input into the console. 
    Scanner keyboard = new Scanner(System.in);

    //Ask user for the number of days to count.
    input = JOptionPane.showInputDialog("Enter the maximum number of days worked in your pay period"
            + " and I will tell you how much money you made. Please enter at least 1."); 
    maxDays = Integer.parseInt(input);      //this makes the user's string input into 
                                        //an integer data type  

    //Input Validation
    while(maxDays < 1)
    {
        System.out.println("You have entered a number that "
                + "is less than 1. \nPlease enter a number that is at"
                + " least 1 or more:");
        maxDays = keyboard.nextInt();
    }


    //next we have the first loop that will only execute if the user enters at least 1 
    while(maxDays >= 1)
    {
        //here's the chart
        System.out.println("Day       Day's Income    Total "); //titles for the chart
        System.out.println("----------------------------------"); //34 dashes/spaces 
        System.out.println("1         $0.01             $0.01 "); //the first day 

        //this next nested loop will do the actual counting and add to the chart with  
        //each iteration
        for(day = 2; day <= maxDays; day++)
        {
            pennies = pennies * 2;      //double pennies
            totalPennies += pennies;    //add the new value of pennies to the running total

            //add information from each iteration to the chart
            System.out.printf("%10.0d" + "$%18.0f" + "$%6.0f", day, pennies, totalPennies );


        }

    }
}

以下是错误消息：

Exception in thread "main" java.util.IllegalFormatPrecisionException: 0
at java.util.Formatter$FormatSpecifier.checkInteger(Formatter.java:2984)
at java.util.Formatter$FormatSpecifier.<init>(Formatter.java:2729)
at java.util.Formatter.parse(Formatter.java:2560)
at java.util.Formatter.format(Formatter.java:2501)
at java.io.PrintStream.format(PrintStream.java:970)
at java.io.PrintStream.printf(PrintStream.java:871)
at assignment4PenniesForPay.assignment4PenniesForPay.main(assignment4PenniesForPay.java:65)

第 65 行是格式化行。

Answer 1

%10.0d 需要一个整数，但您在其中添加了一个小数位。