Question

我已修复原始代码中的错误并正确格式化。但是，代码现在在进入最后一个方法之前重复String next（）。我以为我明白了为什么，但是当我试图修复它时，程序又失败了。谢谢你的时间！

import java.util.Scanner;

public class LearnScanner {
    public static void main (String[] args) {
        first();
        next();
        third();
    }
    public static void first() {
        Scanner input = new Scanner(System.in);
        System.out.println("Welcome to Vacation Planner!!");
        System.out.print("What is your name?");
        String name = input.nextLine();
        System.out.print("Nice to meet you " + name + ", where are you travelling to?");
        String destination = input.nextLine();
        System.out.println("Great! "+destination +" sounds like a great trip");
     }
    public static String next() {
        Scanner input = new Scanner(System.in);
        System.out.print("How many days are you going to spend travelling?");
        String days = input.nextLine();
        System.out.print("How much money in USD are you planning to spend on your trip?");
        String budget = input.nextLine();
        System.out.print("What is the three letter currency symbol for your travel destination?");
        String currency = input.nextLine();
        System.out.print("How many " + currency + " are there in 1 USD?");
        String currencyConversion = input.nextLine();
        return days;
    }
    public static void third() {
        int days = Integer.valueOf(next());
        int hours = days * 24;
        int minutes = hours * 60;
        System.out.println("If your are travelling for " + days + " days that is the same as " + hours + " hours or " + minutes + " minutes");
    }


    }

Answer 1

从我看到的，方法next（）从main方法调用一次，然后在第三次调用

int days = Integer.valueOf(next());

也许你应该创建一个名为days的实例变量，并在其中存储next（）的值。然后在third（）方法中使用变量的值。即。

import java.util.Scanner;

public class LearnScanner {
    private static int days = 0;

    public static void main (String[] args) {
        first();
        days = Integer.parseInt(next());
        third();
    }
    public static void first() {
        Scanner input = new Scanner(System.in);
        System.out.println("Welcome to Vacation Planner!!");
        System.out.print("What is your name?");
        String name = input.nextLine();
        System.out.print("Nice to meet you " + name + ", where are you travelling to?");
        String destination = input.nextLine();
        System.out.println("Great! "+destination +" sounds like a great trip");
     }
    public static String next() {
        Scanner input = new Scanner(System.in);
        System.out.print("How many days are you going to spend travelling?");
        String days = input.nextLine();
        System.out.print("How much money in USD are you planning to spend on your trip?");
        String budget = input.nextLine();
        System.out.print("What is the three letter currency symbol for your travel destination?");
        String currency = input.nextLine();
        System.out.print("How many " + currency + " are there in 1 USD?");
        String currencyConversion = input.nextLine();
        return days;
    }
    public static void third() {
        int tempDays = Integer.valueOf(days);
        int hours = days * 24;
        int minutes = hours * 60;
        System.out.println("If your are travelling for " + tempDays + " days that is the same as " + hours + " hours or " + minutes + " minutes");
    }

更新了util.scanner重复方法

1 个答案: