从不同方法寻址变量的问题

Question

import java.util.Scanner;
public class SalaryCountingWithMethods {
    public static void main (String [] args) {
        double hours, salaryPerHour, taxPercent, taxlessSalary, taxPart;
 
        hours =  askHours();
        salaryPerHour = askSalaryPerHour();
        taxPercent = askTaxPercent();
        
        taxlessSalary = countTaxlessSalary(hours, salaryPerHour);
 
        taxPart = taxlessSalary * taxPercent /100;
 
        System.out.println("\nSalary before taxes: " + taxlessSalary);
        System.out.println("Tax part of the salary: " + taxPart);
        System.out.println("Salary after taxes: " + (taxlessSalary-taxPart));        
    }
static Scanner reader = new Scanner(System.in);
    private static int askHours(){
        System.out.print("Type in the number of work hours: ");
        int hours = reader.nextInt();
        return hours;
        }
    
    private static int askSalaryPerHour(){
        System.out.print("Type in salary per hour: ");
        int perHour = reader.nextInt();
        return perHour;
        }
        
    public static int askTaxPercent(){
        
        System.out.print("Type in the number of work hours: ");
        int taxPercent = reader.nextInt();
        return taxPercent;
        }
private static double countTaxlessSalary(double hours, double salaryPerHour){
    double taxPercent = 0;
    double fullSalary = (float)hours * (float)salaryPerHour;
    double taxPart = (float)fullSalary * (float)taxPercent /100;
    double taxLess = (float)fullSalary - (float)taxPart;
    return taxLess;
    }
}

Your program returned a none-zero value. You should return 0 from the main() function.
Exception in thread "main" java.util.InputMismatchException at java.base/java.util.Scanner.throwFor(Scanner.java:939) at java.base/java.util.Scanner.next(Scanner.java:1594) at java.base/java.util.Scanner.nextInt(Scanner.java:2258) at java.base/java.util.Scanner.nextInt(Scanner.java:2212) at SalaryCountingWithMethods.askHours(SalaryCountingWithMethods.java:29) at SalaryCountingWithMethods.main(SalaryCountingWithMethods.java:14)

Answer 1

下面的SalaryCountingWithMethods类要求三个浮点数
问题可能是您正在处理浮点数，但您定义的方法接受Integer输入。当您给出double而不是integer时，这将导致java.util.InputMismatchException错误。

private static int askHours(){
   System.out.print("Type in the number of work hours: ");
   int hours = reader.nextInt();
   return hours;
}

您应该接受double作为输入，而不是整数。

private static double askHours(){
   System.out.print("Type in the number of work hours: ");
   double hours = reader.nextDouble();
   return hours;
}

对于其他两个方法AskSalaryPerHour()和AskTaxPercent()也应该这样做。