Java基础 6.28

1.零钱通项目

package com.logic.smallchange;

import java.util.Scanner;

public class SmallChangeSys {
    //化繁为简
    //1.先完成显示菜单 并可以选择菜单 给出对应提示

    public static void main(String[] args) {


        //定义相关变量

        boolean loop = true;
        Scanner scanner = new Scanner(System.in);
        String key = "";
        do {
            System.out.println("=============零钱通菜单=============");
            System.out.println("\t\t\t1 零钱通明细");
            System.out.println("\t\t\t2 收益入账");
            System.out.println("\t\t\t3 消费");
            System.out.println("\t\t\t4 退     出");

            System.out.print("请选择(1-4): ");
            key = scanner.next();

            //使用switch分支控制
            switch (key) {
                case "1":
                    System.out.println("1 零钱通明细");
                    break;
                case "2":
                    System.out.println("2 收益入账");
                    break;
                case "3":
                    System.out.println("3 消费");
                    break;
                case "4":
                    System.out.println("4 退     出");
                    loop = false;
                    break;
                default:
                    System.out.println("选择有误，请重新选择");
            }
        } while (loop);
        System.out.println("退出了零钱通...");
    }
}