Step 5: Generic Finance Constraints

5. Generic Finance Constraints

Configure reusable calculators using generic type boundaries.

Detailed Implementation Steps:

Implement a generic tracker class: class FinanceTracker<T extends Transaction>. Add a private list array to store transaction objects.

Implement class methods to add items, filter items by category, and summarize balances using the generic type T. Ensure class instantiation enforces these generic parameter constraints.

Verification Checklist:

1. Confirm class instances can be initialized with transaction subclasses.