处理Java异常链的问题案例

原创男娘i 2024-09-12 09:54 66阅读 0赞

在Java编程中，异常链是一种处理多级错误情况的机制。下面提供一个处理Java异常链的案例：

```java
public class BankTransaction {

private double amount;
    private String accountNumber;

public BankTransaction(double amount, String accountNumber) {
        this.amount = amount;
        this.accountNumber = accountNumber;
    }

public void performTransaction() throws Exception {
        if (amount < 0) {
            throw new IllegalArgumentException("Amount cannot be negative.");
        }

// Simulate a bank system
        if (accountNumber.endsWith("00")) && amount == 1000) {
            System.out.println("Transaction successful! New account created.");
            // Create a new account in this scenario
            createNewAccount(accountNumber);
        } else {
            throw new Exception("Transaction failed. Incorrect account information or insufficient amount.");
        }
    }

private void createNewAccount(String accountNumber) throws Exception {
        if (accountNumber.contains("new")) {
            System.out.println("Account creation successful! New account number: new123456");
            return;
        } else {
            throw new Exception("Failed to create new account. Incorrect account number.");
        }
    }

public static void main(String[] args) {
        BankTransaction transaction = new BankTransaction(1000, "12345600"));
        try {
            transaction.performTransaction();
        } catch (Exception e) {
            System.err.println("Error during transaction: " + e.getMessage());
            e.printStackTrace();
        }
    }
}
```

在这个案例中，我们创建了一个银行交易类`BankTransaction`。它有一个方法`performTransaction()`，这个方法尝试进行一笔转账操作。

如果在转账过程中检查到错误（如金额不足或账户信息无效），就会抛出异常并捕获在主程序中显示错误信息。