Java 自动取款机 (ATM) 代码299

简介

自动取款机 (ATM) 是金融机构提供的电子机器，允许客户在不进入银行的情况下访问自己的账户。ATM 通常提供各种服务，包括取款、存款、转账和查询余额。本文将指导您使用 Java 编程语言构建一个基本的 ATM 模拟器，演示 ATM 系统的基本功能。

所需软件

在开始编写代码之前，您需要确保您的计算机上已安装以下软件：
- Java 开发工具包 (JDK)
- 文本编辑器（如 Notepad++ 或 Sublime Text）

实施import ;
import ;
public class ATM {
private static HashMap accounts = new HashMap();
public static void main(String[] args) {
Scanner scanner = new Scanner();
int choice;
do {
("1. 取款");
("2. 存款");
("3. 转账");
("4. 查询余额");
("5. 退出");
("请输入您的选择 (1-5): ");
choice = ();
switch (choice) {
case 1:
withdraw();
break;
case 2:
deposit();
break;
case 3:
transfer();
break;
case 4:
getBalance();
break;
case 5:
("谢谢使用我们的 ATM！");
break;
default:
("无效选择，请重试。");
}
} while (choice != 5);
();
}
private static void withdraw() {
Scanner scanner = new Scanner();
("请输入您的账号：");
String accountNumber = ();
("请输入取款金额：");
double amount = ();
if ((accountNumber)) {
double balance = (accountNumber);
if (balance >= amount) {
(accountNumber, balance - amount);
("取款成功！您的新余额为：" + (accountNumber));
} else {
("余额不足！您的当前余额为：" + balance);
}
} else {
("此账号不存在！");
}
}
private static void deposit() {
Scanner scanner = new Scanner();
("请输入您的账号：");
String accountNumber = ();
("请输入存款金额：");
double amount = ();
if ((accountNumber)) {
double balance = (accountNumber);
(accountNumber, balance + amount);
("存款成功！您的新余额为：" + (accountNumber));
} else {
("此账号不存在！");
}
}
private static void transfer() {
Scanner scanner = new Scanner();
("请输入您的账号：");
String fromAccountNumber = ();
("请输入转账账号：");
String toAccountNumber = ();
("请输入转账金额：");
double amount = ();
if ((fromAccountNumber) && (toAccountNumber)) {
double fromBalance = (fromAccountNumber);
double toBalance = (toAccountNumber);
if (fromBalance >= amount) {
(fromAccountNumber, fromBalance - amount);
(toAccountNumber, toBalance + amount);
("转账成功！您的新余额为：" + (fromAccountNumber));
} else {
("余额不足！您的当前余额为：" + fromBalance);
}
} else {
("账号不存在！");
}
}
private static void getBalance() {
Scanner scanner = new Scanner();
("请输入您的账号：");
String accountNumber = ();
if ((accountNumber)) {
("您的余额为：" + (accountNumber));
} else {
("此账号不存在！");
}
}
}