错误 Java 扫描仪无法转换为双精度

Question

它在函数调用时显示错误，说不能将扫描器更改为双

import java.util.Scanner;

public class Main{
    
    public static double calculateGrossIncome(double hrsPerWeek, double hrlyPay){
        double weeklyPay = hrsPerWeek * hrlyPay;
        double result = weeklyPay * 52;
        return result;
        
        
    }
    public static void main(String[] args)
    {
        System.out.println("Enter HOurly Pay :");
        Scanner hrlyPay = new Scanner(System.in);
        hrlyPay.nextDouble();
        
        System.out.println("Enter Hours Per week :");
        Scanner hrsPerWeek = new Scanner(System.in);
        hrsPerWeek.nextDouble();
        
        double income = calculateGrossIncome( hrsPerWeek, hrlyPay);
        System.out.println("The employee toatl gross income is " + income);
     
        
    }
}

Answer 1

你只需要一个扫描仪实例，你应该将用户输入保存到一个变量中。

public static void main(String[] args)
{
    System.out.println("Enter HOurly Pay :");
    Scanner scanner = new Scanner(System.in);
    double hrlyPay = scanner.nextDouble();
    
    System.out.println("Enter Hours Per week :");
    double hrsPerWeek = scanner.nextDouble();
    
    double income = calculateGrossIncome( hrsPerWeek, hrlyPay);
    System.out.println("The employee toatl gross income is " + income);
   
}

错误 Java 扫描仪无法转换为双精度

Error Java Scanner cannot be converted to double

java

double