java - 数组列表扫描器循环退出功能

Question

import java.util.ArrayList;
import java.util.Scanner;

public class test {

public static void main(String[] args) {

    ArrayList<String> name = new ArrayList<String>();
    ArrayList<String> game = new ArrayList<String>();
    ArrayList<Integer> score = new ArrayList<Integer>();
    ArrayList<Integer> time = new ArrayList<Integer>();

    Scanner scanner = new Scanner(System.in);
    String answer = "yes";

    {
        do {
            System.out.print("Please enter your username: ");
            name.add(scanner.nextLine());
            System.out.println("Please enter the game: ");
            game.add(scanner.nextLine());
            System.out.println("Please Enter Achievement Score: ");
            score.add(scanner.nextInt());
            System.out.println("Please Enter Playtime: ");
            time.add(scanner.nextInt());
            System.out.print("Any letter to continue alternatively type     quit to Quit.");
            answer = scanner.next();
        } while (!answer.equals("quit"));

        if (answer.equals("quit")); //want it to go back to start     another direcotry here
        else {

            System.out.println("Thanks for adding to the database.");
            for (int i = 0; i < name.size(); i++) {
                System.out.print("Username:" +name.get(i)+"\n");
                System.out.print("~~~~~~~~~~~~" +"\n");
                System.out.print("Game:" +game.get(i)+"\t");
                System.out.print("Score:" +score.get(i)+"\n");
                System.out.print("Minutes played:"+time.get(i));
                System.out.println("");
            }
        }
    }
}
}

问题在于，程序在键入 Quit 后并未退出，而是继续运行并将两个问题放在一行上，如下所示。我该如何解决这个问题？

• 请输入您的用户名:abc123
• 请进入游戏:
• 侠盗猎车手 V
• 请输入成就分数:
• 1200
• 请输入游戏时间:
• 120
• 任意字母以继续，或者键入 quit 以 Quit.Quit
• 请输入您的用户名: 请进入游戏:

Answer 1

问题是您正在比较 quit 的大小写值。您需要将它们设置为相同的大小写类型以使它们相等并退出程序。

将支票更改为

 while (!answer.toLowerCase().equals("quit"));
    if (answer.toLowerCase().equals("quit"));

这会将您的输入更改为小写，这就是您要比较的内容。