java - 获取用户输入并在java中更改它

Question

系统要求我获取成员(member)类型的用户输入。

成员(member)资格分为金级/银级/铜级。

Gold membership = 750
Silver membership = 450
Bronze membership = 250

下一步是询问用户是否需要租用雪地轮胎，如果需要，则需要额外支付 10%，但是我被困在这一点上，有没有办法获取用户输入的成员(member)资格的结果以及使用 if 语句来确定是否添加 10%。

这是我到目前为止的代码。

import java.io.*;
public class SkiLodge {

    public static void main(String[] args) throws Exception
    {

        InputStreamReader ui = new InputStreamReader (System.in);
        BufferedReader gd = new BufferedReader(ui);
        BufferedReader sr = new BufferedReader(ui);
        BufferedReader bz = new BufferedReader(ui);

        System.out.println("Select Membership Type: (Gold/Silver/Bronze");
        String membership = gd.readLine();

        double x;

        if (membership.equals("Gold"))
            System.out.println("Gold Membership Selected: £" + (x = 750));
        else if (membership.equals("Silver"))
            System.out.println("Silver Membership Selected: £" + (x = 450));
        else if (membership.equals("Bronze"))
            System.out.println("Bronze Membership Selected: £" + (x = 250));
        else System.out.println("Invalid Membership");



        System.out.println("Do you require snow tyre rental? (yes/no)");
        String tyreRental = sr.readLine();


        if (tyreRental.equals("yes"))   
            System.out.println(x = x * 1.1);

    }

}

Answer 1

您应该只创建一个 Reader 并用它来读取所有输入。由于它们都源自 System.in，因此您的输入将出现在所有阅读器中。例如，“Gold/Silver/Bronze”的输入将位于您的每个 BufferedReader 中，因此当您读取 String tyreRental = sr.readLine();您实际上将再次读取“金/银/铜”输入。

这应该更适合您:

import java.io.*;
public class SkiLodge {

    public static void main(String[] args) throws Exception
    {

        InputStreamReader ui = new InputStreamReader (System.in);
        BufferedReader inputReader = new BufferedReader(ui);

        System.out.println("Select Membership Type: (Gold/Silver/Bronze");
        String membership = inputReader.readLine();

        double x = 0.0d;

        if (membership.equals("Gold"))
            System.out.println("Gold Membership Selected: £" + (x = 750));
        else if (membership.equals("Silver"))
            System.out.println("Silver Membership Selected: £" + (x = 450));
        else if (membership.equals("Bronze"))
            System.out.println("Bronze Membership Selected: £" + (x = 250));
        else System.out.println("Invalid Membership");



        System.out.println("Do you require snow tyre rental? (yes/no)");
        String tyreRental = inputReader.readLine();


        if (tyreRental.equals("yes"))
            System.out.println(x = x * 1.1);

    }

}