java arraylist 存储用户输入

Question

当用户输入 yes 时，如何让它返回到启动另一个目录，以及如何使用打印格式打印数组列表

谢谢

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

public class AAA
{
    public static void main(String[] args) 
{

    ArrayList<String> name = new ArrayList<String>();
    ArrayList<Integer> phone = new ArrayList<Integer>(); 
    Scanner scanner = new Scanner(System.in); 


    {
        System.out.println("Please enter your name: ");
        name.add(scanner.next());
        System.out.println("Please enter your number: ");
        phone.add(scanner.nextInt());

        System.out.println("Do you want to add a directory yes/no?");
        String answer = scanner.nextLine(); 

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

        else 
    {

        System.out.println("Thanks for adding to the directory");
        System.out.println(answer());
    }


    }

    }
}

Answer 1

尝试使用 while true，然后，当用户输入 no 时，就会破坏外观。代码看起来像这样:

ArrayList<String> name = new ArrayList<String>();
ArrayList<Integer> phone = new ArrayList<Integer>(); 
Scanner scanner = new Scanner(System.in); 

while(true){
    System.out.println("Please enter your name: ");
    name.add(scanner.next());
    System.out.println("Please enter your number: ");
    phone.add(scanner.nextInt());

    System.out.println("Do you want to add a directory yes/no?");
    String answer = scanner.next(); 

    if (answer.equals("no")){
        System.out.println("Thanks for adding to the directory");
        System.out.println(answer());
        break; //
    }

}

还有其他策略，例如使用 do/while。但本质上你必须使用循环。