java 时间简单电话簿 初学者入门

package test;

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

public class MirrorTelBook {

    // 声明存储名字列表
    ArrayList<String> nameList = new ArrayList<String>();

    // 声明存储电话号码列表
    ArrayList<String> numberList = new ArrayList<String>();

    public static Scanner in = new Scanner(System.in);

    public static void main(String[] args) {
        MirrorTelBook instance = new MirrorTelBook();
        do {
            System.out.println("欢迎使用镜子电话簿!");
            int operation = 0;
            System.out.println("功能选择：1、添加号码 2、查询号码 0、结束");
            operation = in.nextInt();

            switch (operation) {
                case 0:
                    break;
                case 1:
                    instance.saveNum();
                    break;
                case 2:
                    instance.fetchNum();
                    break;
            }
            System.out.println("是否还要继续? (yes/no)");
        } while (in.next().equals("yes"));
        System.exit(0);
        System.out.print("结束！");
    }

    public void saveNum() {
        do
        {
            System.out.println("姓名?");
            String n = in.next();
            nameList.add(n);
            System.out.println("联系方式？");
            String p = in.next();
            numberList.add(p);
            System.out.println("是否还要继续保存? (yes/no)");
        } while (in.next().equals("yes"));
    }

    public void fetchNum() {
        do {
            System.out.println("请输入查询名字！");
            // 如果为0 表示没找到 1 表示找到
            int flag = 0;
            String name = in.next();
            for (int i = 0; i < nameList.size(); i++) {
                if (nameList.get(i).equals(name)) {
                    System.out.println(String.format("%s 电话号码为：%s!", name, numberList.get(i)));
                    flag = 1;
                    break;
                }
            }
            if (flag == 0) {
                System.out.print(String.format("没有找到%s电话号码！", name));
            }
            System.out.println("是否还要继续查找? (yes/no)");
        } while (in.next().equals("yes"));
    }
}