Additional Notes
How would you explain a common mistake when exposing collections in a class in an interview?
Track: Java
Topic: Core Java
Focus: Code Reading and State Safety
Java: Code Reading and State Safety
Answer
Exposing collections can lead to unintended modifications.
If a class exposes a collection directly, external code can modify it, potentially breaking invariants. In an e-commerce setting, a Customer class exposing its order list allows any code with access to it to add or remove orders, bypassing any intended business logic.
If a class exposes a collection directly, external code can modify it, potentially breaking invariants. In an e-commerce setting, a Customer class exposing its order list allows any code with access to it to add or remove orders, bypassing any intended business logic.
Topics: Code Reading and State Safety Core Java Java