Payment Processing System in Java: Explanation & Practice

Create a payment processing hierarchy

Problem summary

Create Payable interface with CreditCard and BankTransfer implementations.

Starter code

// Payable interface: boolean processPayment(double amount)
// CreditCard: adds 2.5% fee, always succeeds
// BankTransfer: no fee, fails if amount > 10000

public class Main {
    public static void main(String[] args) {
        // Test case 1: Credit card 100
        // Print: Charged: <amount with fee>
    }
}

Expected output and test cases

CC 100 + 2.5%
```
Charged: 102.5
```
Bank transfer 5000
```
Transfer: 5000.0
```
Bank transfer over limit
```
Transfer failed
```

Hints

Interface defines contract
Each class handles payment differently
Check amount limit for bank transfer

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