编程挑战：用Java设计一个简单的银行储蓄系统

原创淡淡的烟草味﹌ 2024-10-06 12:09 43阅读 0赞

要设计一个简单的银行储蓄系统，我们可以创建一个名为`BankAccount`的类，然后添加方法来处理存款、取款和查询余额等操作。下面是一个基本的实现：

```java
import java.util.HashMap;
import java.util.Map;

public class BankAccount {
    private String accountNumber;
    private Map<String, Double> transactions = new HashMap<>();

// Constructor
    public BankAccount(String accountNumber) {
        this.accountNumber = accountNumber;
    }

// Deposit method
    public void deposit(double amount) {
        if (amount > 0) {
            transactions.put("Deposit", amount);
            System.out.println("Deposited: " + amount);
        } else {
            System.out.println("Invalid deposit amount.");
        }
    }

// Withdrawal method
    public boolean withdraw(double amount) {
        if (transactions.containsKey("Balance")) && amount > 0) {
            double currentBalance = transactions.get("Balance");
            if (amount <= currentBalance) {
                transactions.put("Withdraw", amount);
                System.out.println("Withdrew: " + amount);
                currentBalance -= amount;
                transactions.put("Balance", currentBalance);
                return true;
            } else {
                System.out.println("Insufficient balance for withdrawal.");
                return false;
            }
        } else {
            System.out.println("Invalid operation. Check account status.");
            return false;
        }
    }

// Query balance method
    public double checkBalance() {
        if (transactions.containsKey("Balance"))) {
            return transactions.get("Balance");
        } else {
            System.out.println("Account not yet initialized. Deposit first.");
            return 0;
        }
    }

// Transaction history method
    public Map<String, Double> transactionHistory() {
        return transactions;
    }
}
```

这个银行账户类提供了存款、取款和查询余额等操作。你可以根据需求扩展此代码，例如添加用户信息、增加交易类型等功能。