java模拟银行存取款业务代码

好的，以下是一个简单的Java代码示例，用于模拟银行存取款业务：

import java.util.Scanner;

public class BankAccount {
    private double balance;
    
    //构造函数
    public BankAccount() {
        balance = 0;
    }
    
    //存款
    public void deposit(double amount) {
        balance += amount;
    }
    
    //取款
    public void withdraw(double amount) {
        balance -= amount;
    }
    
    //获取余额
    public double getBalance() {
        return balance;
    }
    
    //主函数
    public static void main(String[] args) {
        BankAccount account = new BankAccount();
        Scanner scanner = new Scanner(System.in);
        
        while (true) {
            System.out.println("请选择操作：1.存款 2.取款 3.查询余额 4.退出");
            int choice = scanner.nextInt();
            
            switch (choice) {
                case 1:
                    System.out.println("请输入存款金额：");
                    double depositAmount = scanner.nextDouble();
                    account.deposit(depositAmount);
                    System.out.println("存款成功！");
                    break;
                case 2:
                    System.out.println("请输入取款金额：");
                    double withdrawAmount = scanner.nextDouble();
                    if (withdrawAmount > account.getBalance()) {
                        System.out.println("余额不足，取款失败！");
                    } else {
                        account.withdraw(withdrawAmount);
                        System.out.println("取款成功！");
                    }
                    break;
                case 3:
                    System.out.println("当前余额为：" + account.getBalance());
                    break;
                case 4:
                    System.out.println("谢谢使用！");
                    System.exit(0);
                    break;
                default:
                    System.out.println("输入有误，请重新选择！");
                    break;
            }
        }
    }
}

这个程序中，我们定义了一个BankAccount类，实现了存款、取款和查询余额等功能。在主函数中，我们使用Scanner类接收用户输入，并根据用户选择执行不同的操作。