创建一个购物管理系统

package day1226;

import java.util.Scanner;

/**
 * StartSMS
 * @author Administrator
 *
 */
class StartSMS{
	String username = "JadeBird";
	String password = "0000";
	String username_test;
	String password_test;
	int choice;
	
	void run(){
		do{
			Scanner input = new Scanner(System.in);
			System.out.println("\t欢迎使用我行我素购物管理系统");
			System.out.println("\t\t1.登录系统");
			System.out.println("\t\t2.退出");
			System.out.println("* * * * * * * * * * * * * * * * * * * * * * * * *");
			System.out.print("请选择，输入数字：");
			choice = input.nextInt();
			if(choice == 1){
				System.out.print("请输入用户名：");
				username_test = input.next();
				System.out.print("请输入密码：");
				password_test = input.next();
				if(!username_test.equals(username)||!password_test.equals(password)){
					System.out.println("@@您没有权限进入系统，请重新登录。@@");
				}else{
					System.out.println("@@登录成功："+username+"@@");
					System.out.println("\t我行我素购物管理系统主菜单");
					System.out.println("* * * * * * * * * * * * * * * * * * * * * * * * *");	
					break;
				}
			}else if(choice == 2){
				System.out.println("系统结束。");
				break;
			}else{
				System.out.println("您输入的数字有误。");
			}
		}while(true);
	}
}

public class homework4 {
	public static void main(String[] args) {
		StartSMS admin = new StartSMS();
		admin.run();
	}
}