java模拟银行账户管理系统

好的，我可以为您提供一个简单的Java模拟银行账户管理系统的示例。

首先，我们需要定义一个账户类，包括账户名、账户余额等属性和相关的方法，如存款、取款等。

public class Account {
    private String name;
    private double balance;

    public Account(String name, double balance) {
        this.name = name;
        this.balance = balance;
    }

    public String getName() {
        return name;
    }

    public double getBalance() {
        return balance;
    }

    public void deposit(double amount) {
        balance += amount;
    }

    public void withdraw(double amount) {
        if (amount <= balance) {
            balance -= amount;
        } else {
            System.out.println("余额不足！");
        }
    }
}

接下来，我们可以定义一个银行类，包含多个账户和相关的操作方法，如开户、销户、查询余额等。

import java.util.ArrayList;

public class Bank {
    private ArrayList<Account> accounts;

    public Bank() {
        accounts = new ArrayList<>();
    }

    public void addAccount(Account account) {
        accounts.add(account);
    }

    public void removeAccount(Account account) {
        accounts.remove(account);
    }

    public double getBalance(String name) {
        for (Account account : accounts) {
            if (account.getName().equals(name)) {
                return account.getBalance();
            }
        }
        System.out.println("账户不存在！");
        return -1;
    }

    public void deposit(String name, double amount) {
        for (Account account : accounts) {
            if (account.getName().equals(name)) {
                account.deposit(amount);
                System.out.println("存款成功！");
                return;
            }
        }
        System.out.println("账户不存在！");
    }

    public void withdraw(String name, double amount) {
        for (Account account : accounts) {
            if (account.getName().equals(name)) {
                account.withdraw(amount);
                System.out.println("取款成功！");
                return;
            }
        }
        System.out.println("账户不存在！");
    }
}

最后，我们可以编写一个测试类，模拟用户使用银行账户管理系统的过程。

import java.util.Scanner;

public class TestBank {
    public static void main(String[] args) {
        Bank bank = new Bank();

        // 开户
        Account account1 = new Account("张三", 1000);
        Account account2 = new Account("李四", 2000);
        bank.addAccount(account1);
        bank.addAccount(account2);

        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请选择操作：1.查询余额 2.存款 3.取款 4.退出");
            int option = scanner.nextInt();
            if (option == 1) {
                System.out.println("请输入账户名：");
                String name = scanner.next();
                double balance = bank.getBalance(name);
                if (balance >= 0) {
                    System.out.println("余额为：" + balance);
                }
            } else if (option == 2) {
                System.out.println("请输入账户名和存款金额：");
                String name = scanner.next();
                double amount = scanner.nextDouble();
                bank.deposit(name, amount);
            } else if (option == 3) {
                System.out.println("请输入账户名和取款金额：");
                String name = scanner.next();
                double amount = scanner.nextDouble();
                bank.withdraw(name, amount);
            } else if (option == 4) {
                break;
            } else {
                System.out.println("输入错误，请重新选择！");
            }
        }
    }
}

以上就是一个简单的Java模拟银行账户管理系统的示例，您可以参考并根据自己的需求进行修改和扩展。