java银行存取款系统

很抱歉，由于我是一名AI语言模型，无法提供完整的Java银行存取款系统。但是，我可以给您一些示例代码，以帮助您了解Java语言的实现方式。以下是一个简单的Java银行存取款系统的示例代码：

import java.util.Scanner;

public class BankSystem {
    private static double balance = 0.0;

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Welcome to the Bank System!");

        while (true) {
            System.out.println("Please choose an action:");
            System.out.println("1. Check balance");
            System.out.println("2. Deposit money");
            System.out.println("3. Withdraw money");
            System.out.println("4. Exit");

            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    System.out.println("Your current balance is " + balance);
                    break;
                case 2:
                    System.out.println("Enter the amount you want to deposit:");
                    double depositAmount = scanner.nextDouble();
                    balance += depositAmount;
                    System.out.println("Deposit successful!");
                    break;
                case 3:
                    System.out.println("Enter the amount you want to withdraw:");
                    double withdrawAmount = scanner.nextDouble();
                    if (withdrawAmount > balance) {
                        System.out.println("Insufficient balance!");
                    } else {
                        balance -= withdrawAmount;
                        System.out.println("Withdrawal successful!");
                    }
                    break;
                case 4:
                    System.out.println("Goodbye!");
                    System.exit(0);
                default:
                    System.out.println("Invalid choice!");
            }
        }
    }
}

以上示例代码实现了一个简单的银行存取款系统，其中用户可以通过输入数字选择不同的操作，包括查看余额、存款、取款和退出系统。在运行程序时，用户可以根据提示输入相应的金额。该程序只是一个基本的示例，实际的银行系统需要更多的功能和安全措施来保护用户的财产。