Java扫描仪异常问题

Question

我正在做我的中期项目，我已经或多或少完成了。我遇到的唯一问题是，当我运行该程序并要求我输入完整员工姓名时，编译器会向我抛出有关扫描仪的异常。我从 Scanner 输入转到“scanner user_input”，但它仍然无法正确编译。任何有关问题所在的提示将不胜感激。

package midterm;

import java.util.Scanner;

public class Midterm {

    public static void main(String[] args) {
        Scanner user_input = new Scanner(System.in);

        System.out.print("If you wish to enter another's employee's inforamtion"
                        + " please press 1, else to exit enter 0.");
        int choice = user_input.nextInt();

        if (choice == 1) {
            System.out.print("What is the employee's full name. ");
            String empName = user_input.next();
            System.out.printf("Please enter the number of hours that the employee has worked. ");
            double hoursWorked = user_input.nextDouble();
            System.out.printf("Please enter the employee's hourly pay rate. ");
            double payRate = user_input.nextDouble();

            displayPay(empName, calculatePay(hoursWorked, payRate));
        }
        else if (choice == 0) {
            System.exit(0);
        }
    }

    public static double calculatePay(double hours, double pay) {
        double wages = 0;

        if (hours <= 40) {
            wages = hours * pay;
        }

        if (hours > 40) {
            double regPay = hours * pay;
            double overTime = (hours - 40) * pay * 1.5;
            wages = regPay + overTime;
        }

        return wages;
    }

    public static void displayPay(String name, double empWage) {
        System.out.print("-----------------------------------------");
        System.out.print("Employee Name: " + name);
        System.out.print("Pay Check Amount: $" + empWage);
        System.out.print("-----------------------------------------");
    }
}

Answer 1

错误在这里:

System.out.print ("What is the employee's full name. ");
String empName = user_input.next();

next() 读取所有内容，直到下一个分隔符(默认情况下为空格)。因此，如果有人输入名字和姓氏(用空格分隔)，则只会读取名字。因此，当您稍后调用 user_input.nextDouble() 时，仍有部分名称需要读取，并且程序会发出嘎嘎声，因为下一个标记(在本例中为姓氏)无法读取被解析为 double。

由于这听起来像是一个学校项目，因此我不会具体说明如何解决它。