java输入一个银行取款代码

在Java中，模拟银行取款功能通常会涉及用户账户操作。你可以创建一个简单的命令行界面程序来实现这个场景。这里是一个基础的示例：

import java.util.Scanner;

class Account {
    private double balance;

    public Account(double initialBalance) {
        this.balance = initialBalance;
    }

    public void deposit(double amount) {
        balance += amount;
        System.out.println("存款成功，当前余额：" + balance);
    }

    public boolean withdraw(double amount) {
        if (amount <= balance) {
            balance -= amount;
            System.out.println("取款成功，当前余额：" + balance);
            return true;
        } else {
            System.out.println("余额不足，无法完成取款");
            return false;
        }
    }
}

public class BankMachine {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Account account = new Account(1000); // 初始化账户余额

        while (true) {
            System.out.println("\n请选择操作：\n1. 存款\n2. 取款\n3. 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);
                    break;
                case 2:
                    System.out.println("请输入取款金额：");
                    double withdrawAmount = scanner.nextDouble();
                    account.withdraw(withdrawAmount);
                    break;
                case 3:
                    System.out.println("感谢使用，再见！");
                    scanner.close();
                    return;
                default:
                    System.out.println("无效的选择，请重新输入。");
            }
        }
    }
}

在这个例子中，用户可以选择存钱、取钱或退出。如果账户余额足够，取款操作会被允许；否则会显示余额不足信息。