本文实例为大家分享了Java实现模拟ATM机的具体代码，供大家参考，具体内容如下

项目名称

模拟ATM机

项目描述

简单实现ATM机功能

代码实现

测试类

public class Test {

//模拟多功能ATM机

public static void main(String[] args) {

ATM atm = new ATM();

atm.opearte();

}

}

主类：实现主方法

public class ATM {

private Bank bank;

public ATM(){

bank = new Bank();

}

private void success(BankCard bankCard) {

while (true) {

System.out.println("请选择：1、查询余额，2、取款，3、存款，4、转账，5、退卡");

Scanner scanner = new Scanner(System.in);

int choice = scanner.nextInt();

if (choice == 5) {

return;

}

switch (choice) {

case 1:

int money = bank.printf(bankCard);

System.out.println("余额：" + money);

break;

case 2:

System.out.println("请输入取款金额：");

money = scanner.nextInt();

bankCard.withdraw(money);

break;

case 3:

System.out.println("请输入存款金额：");

money = scanner.nextInt();

bankCard.deposit(money);

break;

case 4:

System.out.println("请输入对方账户id：");

int id = scanner.nextInt();

BankCard card = bank.transfer(id);

if(card != null){

System.out.println("请输入转账金额：");

money = scanner.nextInt();

if(money <= bankCard.getMoney()){

bankCard.withdraw(money);

card.deposit(money);

}else {

System.out.println("转账失败");

}

}else {

System.out.println("未找到该账户");

}

break;

default:

}

}

}

private void login(){ //登录

System.out.println("请输入账号，密码");

Scanner scanner = new Scanner(System.in);

int id = scanner.nextInt();

int password = scanner.nextInt();

BankCard bankCard = bank.search(id,password);

if(bankCard != null){

System.out.println("登录成功");

success(bankCard);

}else {

System.out.println("登录失败，请注册");

}

}

private void register(){ //注册

System.out.println("请输入账号，密码");

Scanner scanner = new Scanner(System.in);

int id = scanner.nextInt();

int password = scanner.nextInt();

BankCard bankCard = bank.search(id,password);

if(bankCard != null){

System.out.println("该账号已存在，请直接登录");

}else {

bank.addcard(id,password);

System.out.println("注册成功");

}

}

public void opearte() {

while (true) {

System.out.println("请选择：1、登录，2、注册，3、退出");

Scanner scanner = new Scanner(System.in);

int choice = scanner.nextInt();

if (choice == 3) {

return;

}

switch (choice) {

case 1:

login();

break;

case 2:

register();

break;

default:

}

}

}

}

银行类：一个银行对应多个ATM机

public class Bank {

private BankCard[] bankCards;

private final int INITSIZE = 10;

private int size;

public Bank(){

bankCards = new BankCard[INITSIZE];

size = 0;

}

public BankCard search(int id,int password){ //搜索

BankCard[] bankCard = bankCards;

for(int i=0;i

if(bankCards[i].getId() == id && bankCards[i].getPassword() == password){

return bankCard[i];

}

}

return null;

}

public void addcard(int id,int password){ //注册

BankCard bankCard = new BankCard(id, password);

if (size == bankCards.length){

bankCards = Arrays.copyOf(bankCards,bankCards.length * 2);

}

bankCards[size++] = bankCard;

}

public int printf(BankCard bankCard){ //显示余额

return bankCard.getMoney();

}

public BankCard transfer(int id){

for(int i=0;i

if(bankCards[i].getId() == id){

return bankCards[i];

}

}

return null;

}

}

银行卡类：不同账户的操作

public class BankCard {

private int id;

private int password;

private int money;

private int size = 0;

public BankCard(int id,int password){

this.id = id;

this.password = password;

money = 0;

}

public int getId(){

return id;

}

public int getPassword(){

return password;

}

public int getMoney(){

return money;

}

public void withdraw(int money){ //取款

if(this.money >= money){

this.money -= money;

}else {

System.out.println("取款失败");

}

}

public void deposit(int money){ //存款

this.money += money;

}

}

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