ATM 问题或找对象
名词： 账号、 密码、 用户、 ATM机、 余额、 现金
类：ATM、 用户：(信息)
属性：现金、 余额、 账号、 密码
用户信息
行为：登陆、查、改、取、存、退出、选择菜单、欢迎界面。
package com.love.bean;
import java.util.Scanner;
public class ATMMachine{
private UserBean[] theUser;//用户信息数组
private UserBean myUser;//当前用户
private int cash = 200000;//现金
public final int MAX_CASH = 1000000;//最大现金额度
public ATMMachine(){
// TODO Auto-generated constructor stub
//用户信息初始化---现在暂时是假数据“账号：123+i”、“密码：123+i”,初始现金金额：随机
this.theUser = new UserBean[5];
foe(int i=0; i<theUser.length; i++){
theUser[i] = new User("123" + i,"123" + i,(int)(Math.radom()*100+1));
}
}
//运行
public void rum(){
this.welcome(){//进入欢迎界面
boolean flag = this. longin();//进入登陆界面
if(flag){
while(true){
int choice = this. chooseMenu();//进入选择菜单
switch(choice){
case 1 :
this.query();//查询
break;
case 2 :
this.storeMoney();//存款
break;
case 3 :
this.getMoney();//取款
break;
case 4 :
this.changePwd();/修改密码
break;
case 5 :
this.exit();//退出
break;
default: :
System.out.println("无此选项！");
break;
}
}
}else{
System.out.println("你的卡被没收，请带上有效证件到前台处理！");
}
}
//欢迎界面
private void welcome(){
System.out.println("***************************");
System.out.println("***********欢 迎**********");
System.out.println("***********使 用**********");
System.out.println("**********爱存不存银行********");
System.out.println("***************************");
}
//登陆
private boolean login(){
Scanner scan = new Scanner(System.in);
for(int i=0; i<3; i++){ //设置3次登陆机会
System.out.println("请输入用户名：");
String inputCardNum = scan.next();
System.out.println("请输入用户密码：");
String inputPwt = scan.next();
for(int j=0; j<theUser; j++){
if(theUser[j].getCarfNum().equals(inputCardNum) && theUser[j].getPassworf().equals(inputPwd)){ //调用get方法查看输入账号与输入密码是否相同 （&&判断两边必须都为真，一边为假则都为假）
System.out.println("登陆成功！);
myUser = theUser[i]; // 赋值用户信息给当前用户
System.out.println(myUser.getCardNum() + "," + myUser.gerPassword()); // 打印当前用户 账号、密码
returm trus;
}
System.out.println("用户名或密码错误，还有“ + (2-i) + "次机会。")；// _反馈还剩登陆次数
}
}
return false;
}
//选择菜单
private int chooseMenu(){
Scanner sc = new Scanner(Syatem.in);
int ny = 0;
while ( true){
System.out.println("输入所选泽菜单:");
System.out.println("1:查询余额：");
System.out.println("2:存款：");
System.out.println("3:取款：");
System.out.println("4:修改密码：");
System.out.println("3:退出：");
ny = sc.nextInt();
return ny;
}
}
//查询余额
private void query(){
System.out.println("当前余额：" + myUser.getAccount()); _ 表示当前用户信息中现金余额；
}
//存款
private void storeMoney(){
Scanner cunqian = new Scanner(System.in);
int fangqian = 0;
System.out.println("提示：存入金额必须为100元，或100元的倍数!");
System.out.println("请输入金额:");
fangqian = cunqian.nextInt();
while(fangqian <=0 || fangqian %100 !=0 || (fangqian + cash) >MAX_CASH){
if(fangqian <= 0){
System.out.println("存入金额应大于0！");
}else if(fangqian %100 !=0){
System.out.println("存入金额应为100元，或100元倍数");
}else {
System.out.println(存入金额与ATM机放置金额超出ATM机存放最大金额);
}
System.out.println("请重新输入存入金额：");
fangqian = cunqian.nextInt();
}
this.cash += fangqian; // 用户现金加上存入金额；
myUser.setAccount(fangqian + myUser.getAccount()); //使用set方法修改账户余额；
System.out.println("存款成功！");
}
//取款
private void getMoney(){
Scanner quMoney = new Scanner(System.in);
int quqian = 0;
System.out.println("输入取款金额:");
quqian = quMoney.nextInt();
while(quqian <= 0 || quqian%100 !=0 || quqian> cash || quqian>myUser.getAccount()){
if(quqian = 0){
System.out.println("取款金额应大于0！");
}else if(quqian %100 !=0){
System.out.println("取款金额应为100元，或100元的倍数！");
}else if(quqian > myUser.getAccount()){
System.out.println("取款金额大于账户余额!");
}
System.out.println("请重新输入取款金额：");
quqian = quMoney.nextInt();
}
this.cash -= quqian; // 用户现金减去取款金额；
myUser.setAccount(myUser.gatAccount() -quqian);//用set方法修改用户余额
}
//改密码
private void changePwd(){
Scanner mi = new Scanner(System.in);
int cishu = 3;
System.out.println("请输入当前用户密码：");
String mima = mi.next();
while(!myUser.getPassword().equals(mima)){
cishu--;
if(cishu = 0){
System.out.println("3次密码输入错误，返回选择菜单！");
retur;
}
System.out.println("密码错误！");
System.out.println("你还有" + cishu + "机会！");
mima = mi.next();
}
System.out.println("请输入当前用户新密码：");
mima = mi.next();
myUser.setpassword(mima);
System.out.println("密码修改成功！");
}
//退出
private void exit(){
System.out.println("退出！);
System.out.println("请取出银行卡！");
System.exit(0);
}
}
// 设置用户信息
// 用户信息调用（使用get/set 方法）
// 用户信息---标准Java类；
public class UserBean{
private String cardNum;//卡号
private String password;//密码
private double account;//账户余额
public UserBean(){
}
public UserBean(String cardNum, String password, double account) {
this.cardNum = cardNum;
this.password = password;
this.account = account;
}
public String getCardNum() {
return cardNum;
}
public void setCardNum(String cardNum) {
this.cardNum = cardNum;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public double getAccount() {
return account;
}
public void setAccount(double account) {
this.account = account;
}
}
//设置mian运行
public class TestMain{
public static void mian(String[] args){
ATMMachine atm = new ATMMachine();
atm.run();
}
}