java - 主线程异常

Question

我正在尝试创建一个程序来查找两个数字之间的所有连续数字的总和，并且我已经创建了一个代码，但我收到了这些错误。任何帮助或摆脱这些错误的方法将不胜感激。谢谢

Exception in thread "main" java.util.IllegalFormatPrecisionException: 1
    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 question15.Question15.main(Question15.java:29)
Java Result: 1
BUILD SUCCESSFUL (total time: 3 seconds)    


     /*
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    package question15;

/**
 *
 * @author MatthewsMacbook
 */
import java.util.Scanner;
public class Question15 {
private static double sumOfTheNumbers (double num1, double num2)
{
double sum= ((num2* (num2 + 1))/2)-((num1-1)* ((num1-1)+1)/2);
return sum;
}
    public static void main(String[] args)
    {
Scanner keyboard = new Scanner (System.in);
System.out.println("This program finds the sum of all consecutive numbers between 2 numbers");
System.out.println("please enter the first number");
double enteredInt1=keyboard.nextDouble();

System.out.println("please enter the second number");
double enteredInt2=keyboard.nextDouble();
double end= sumOfTheNumbers (enteredInt1, enteredInt2);
System.out.printf(" the sum of the numbers between %.1f"+"and : %.1d is: %.1f units", enteredInt1, enteredInt2, end);

    }

}

Answer 1

您的打印声明中有一个拼写错误。这是

System.out.printf(" the sum of the numbers between %.1f"+"and : %.1d is: %.1f units", enteredInt1, enteredInt2, end);

应该是:

System.out.printf(" the sum of the numbers between %.1f"+"and : %.1f is: %.1f units", enteredInt1, enteredInt2, end);