Additional Notes
How would you explain a common pitfall of exposing mutable class fields in an interview?
Track: Java
Topic: OOP
Focus: Defensive Copying
Java: Defensive Copying
Answer
Exposing mutable fields can lead to external unintended modifications.
Exposing mutable fields directly allows external code to alter the object's state, potentially breaking the class's invariants or causing unexpected behavior. In the context of an e-commerce application, if a ShoppingCart exposes its internal list of items, clients could directly add or remove items, bypassing any business logic checks.
Exposing mutable fields directly allows external code to alter the object's state, potentially breaking the class's invariants or causing unexpected behavior. In the context of an e-commerce application, if a ShoppingCart exposes its internal list of items, clients could directly add or remove items, bypassing any business logic checks.
Topics: Defensive Copying Java OOP