ATM模拟程序

/*

要求：使用字符用户界面。当输入给定的卡号和密码（初始卡号和密码为123456）时，系统能登录ATM柜员机系统，用户可以按照以下规则进行：

1、查询余额：初始余额为10000元

2、ATM取款：每次取款金额为100的倍数，总额不超过5000元清滑，支取金额不允许透支。

3、ATM存款：不能出现负存款。

4、修改密码：新密码长度不缓正芦小于6位，不允许出现6位完全相同的情况，只有旧密码正确，新密码符合要求，且两次输入相同的情况下才可以成扰带功修改密码。

（卡号密码余额放到文件中）

*/

public class ATM {

private Account acc

private File dataFile

private FileWriter fw

private BufferedWriter bw

private String filePath = "./data.txt"

public ATM() {

this.acc = new Account()

try {

this.dataFile = new File(this.filePath)

if (!this.dataFile.exists()) {

this.dataFile.createNewFile()

}

this.fw = new FileWriter(this.filePath)

this.bw = new BufferedWriter(this.fw)

} catch (IOException io) {

System.err.println("Cannot open file")

io.printStackTrace()

} catch (Exception e) {

e.printStackTrace()

}

}

public static void main(String[] args) {

new ATM().interact()

}

public void interact() {

BufferedReader br = new BufferedReader(new InputStreamReader(System.in))

System.out.println("Account #: ")

String temp = br.readLine()

System.out.println("Password: ")

String temp2 = br.readLine()

if (!this.acc.isValid(Long.parseLong(temp.trim()), temp2.trim()) {

System.err.println("Wrong password")

return

}

System.out.println("1. Account Inquery.")

System.out.println("2. Withdraw")

System.out.println("3. Deposit.")

System.out.println("4. Change Password.")

System.out.println("5. Export to File.")

System.out.println("0. Exit.")

int c = 100

while (c != 0) {

String str = br.readLine()

try {

int c = Integer.parseInt(str.trim())

} catch (NumberFormatException nfe) {

System.err.println("Invalid choice")

continue

}

switch (c) {

case 0:

System.out.println("Thank you")

break

case 1:

System.out.println("Balance: " + this.acc.balanceInquery())

break

case 2:

System.out.println("How much? ")

String temp = br.readLine()

try {

long ammount = Long.parseLong(temp.trim())

this.acc.withdraw(ammount)

break

} catch (NumberFormatException nfe) {

System.err.println("Invalid amount")

continue

}

case 3:

System.out.println("How much? ")

String temp = br.readLine()

try {

long ammount = Long.parseLong(temp.trim())

this.acc.deposit(ammount)

break

} catch (NumberFormatException nfe) {

System.err.println("Invalid amount")

continue

}

case 4:

System.out.println("Old password: ")

String temp = br.readLine()

System.out.println("New password: ")

String temp2 = br.readLine()

this.acc.changePassword(temp, temp2)

break

case 5:

this.bw.write(this.acc.toString())

break

default:

break

}

}

}

}

class Account {

private long accNo = 123456

private String pass = "123456"

private long balance = 10000

public Account() {

}

public boolean isValid(long accNo, String pass) {

return (this.accNo == accNo) &&(pass.equals(this.pass))

}

public void changePassword(String oldPass, String password) {

if (!oldPass.equals(this.pass)) {

System.err.println("Wrong password.")

return

}

if (password.length <6) {

System.err.println("Password too short")

return

}

if (password.equals(this.pass)) {

System.err.println("Password cannot be the same.")

return

}

this.pass = password

}

public long balanceInquery() {

return this.balance

}

public void withdraw(long amount) {

if (amount >5000 || amount <0) {

System.err.println("Withdraw limit: $0-$5000")

return

}

if ((amount % 100) != 0) {

System.err.println("The amount has to be a product of 100")

return

}

long newBalance = this.balance - amount

if (newBalance <0) {

System.err.println("Not enough money in the account")

return

}

this.balance = newBalance

}

public void deposit(long amount) {

if (amount <0) {

System.err.println("Cannot deposit negative amount")

return

}

this.balance += amount

}

public String toString() {

return ("Account #: " + this.accNo + "\n" + "Password: " + this.pass + "\n" + "Balance: " + this.balance)

}

}

请采纳答案，支持我一下。

密码功能已实现。试试吧。用户：lorin ，密码： 123

import java.util.Scanner

public class ATM1 {

Scanner sc = new Scanner(System.in)

private String name = "lorin"

private double password = 123

private double money = 500

public void aloha(){

System.out.println("***********************")

System.out.println("* *")

System.out.println("* 欢迎使用ATM *")

System.out.println("* *")

System.out.println("* 制作人：lorin *")

System.out.println("* *")

System.out.println("* *")

System.out.println("************************")

System.out.println("请输入用户名：")

String s = sc.next()

if(s.equals("lorin")) {

System.out.println("请输入密码：")

int ss = sc.nextInt()

if(ss == 123) {

land()

}else{

System.out.println("密码错罩蚂误，系统退出")

System.exit(0)

}

}else{

System.out.println("用户名错误，系统退出")

System.exit(0)

}

}

//登陆页面

public void land(){

System.out.println("请选择 *** 作界面：1取款，2存款，3查询，4转账，5退出")

int a = sc.nextInt()// 请加入此句

switch(a){

case 1 : // 去掉‘’ 因为a 为int型。胡闷历

get()

break

case 2 :

set()

break

case 3 :

query()

break

case 4 :

divert()

break

case 5 :

SetOut()

break

}

}

//取款

public void get(){

System.out.println("请输入取款金额：")

int a = sc.nextInt()

if(a>money){

System.out.println("余额不足！")

}else{

money-=a

System.out.println("当前余额为："+money)

land()

}

}

//存款

public void set(){

System.out.println("请输入存款金额：")

int a = sc.nextInt()

money+=a

System.out.println("当前余额为：裤搜"+money)

land()

}

//查询

public void query(){

System.out.println("当前余额为："+money)

land()

}

//转账

public void divert(){

System.out.println("该功能站未开放！")

land()

}

//退出

public void SetOut(){

System.exit(0)

}

public static void main(String[] args) {

ATM1 atm = new ATM1()

atm.aloha()

}

}

求采纳为满意回答。

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