银行存取款java

银行存取款Java

介绍

银行存取款是一个非常常见的业务场景，通过编写Java程序，我们可以模拟这个过程。

在本文中，我们将使用Java编写一个简单的银行存取款系统，并通过代码示例来说明。

设计思路

我们的银行存取款系统将包含以下几个核心部分：

1. 银行账户类（BankAccount）：代表用户的银行账户，包含账户名和余额等信息，提供存款和取款方法。

2. 银行类（Bank）：代表银行，可以创建和管理多个银行账户。

3. 用户界面类（BankUI）：提供用户界面，允许用户进行存款和取款操作。

4. 主类（Main）：程序的入口点，初始化银行和用户界面，并实现用户与银行的交互。

代码示例

银行账户类（BankAccount）

public class BankAccount {
    private String accountName;
    private double balance;

    public BankAccount(String accountName) {
        this.accountName = accountName;
        this.balance = 0.0;
    }

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

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

银行类（Bank）

public class Bank {
    private List<BankAccount> accounts;

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

    public void createAccount(String accountName) {
        BankAccount account = new BankAccount(accountName);
        accounts.add(account);
    }

    public BankAccount getAccount(String accountName) {
        for (BankAccount account : accounts) {
            if (account.getAccountName().equals(accountName)) {
                return account;
            }
        }
        return null;
    }
}

用户界面类（BankUI）

import java.util.Scanner;

public class BankUI {
    private Bank bank;

    public BankUI(Bank bank) {
        this.bank = bank;
    }

    public void start() {
        Scanner scanner = new Scanner(System.in);
        boolean running = true;

        while (running) {
            System.out.println("1. Create Account");
            System.out.println("2. Deposit");
            System.out.println("3. Withdraw");
            System.out.println("4. Exit");
            System.out.print("Enter your choice: ");

            int choice = scanner.nextInt();
            scanner.nextLine();

            switch (choice) {
                case 1:
                    System.out.print("Enter account name: ");
                    String accountName = scanner.nextLine();
                    bank.createAccount(accountName);
                    System.out.println("Account created successfully!");
                    break;
                case 2:
                    System.out.print("Enter account name: ");
                    accountName = scanner.nextLine();
                    BankAccount account = bank.getAccount(accountName);
                    if (account != null) {
                        System.out.print("Enter amount to deposit: ");
                        double amount = scanner.nextDouble();
                        account.deposit(amount);
                        System.out.println("Amount deposited successfully!");
                    } else {
                        System.out.println("Account not found!");
                    }
                    scanner.nextLine();
                    break;
                case 3:
                    System.out.print("Enter account name: ");
                    accountName = scanner.nextLine();
                    account = bank.getAccount(accountName);
                    if (account != null) {
                        System.out.print("Enter amount to withdraw: ");
                        double amount = scanner.nextDouble();
                        account.withdraw(amount);
                        System.out.println("Amount withdrawn successfully!");
                    } else {
                        System.out.println("Account not found!");
                    }
                    scanner.nextLine();
                    break;
                case 4:
                    running = false;
                    break;
                default:
                    System.out.println("Invalid choice!");
                    break;
            }
        }
    }
}

主类（Main）

public class Main {
    public static void main(String[] args) {
        Bank bank = new Bank();
        BankUI bankUI = new BankUI(bank);
        bankUI.start();
    }
}

甘特图

gantt
    title 银行存取款项目
    dateFormat  YYYY-MM-DD
    section 设计
    银行账户类     :done, 2022-10-01, 1d
    银行类         :done, 2022-10-02, 1d
    用户界面类     :done, 2022-10-03, 1d
    主类           :done, 2022-10-04, 1d
    section 编码
    银行账户类     :done, 2022-10-05, 2d
    银行类         :done, 202