Additional Notes
How would you explain a safer approach to handle mutable 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
Return a copy or unmodifiable view of the collection.
To prevent modifications from outside the class, return a copy or an unmodifiable view of a collection. This ensures that the internal collection remains unchanged. For example, in a Customer class, returning Collections.unmodifiableList(orders) from getOrders method ensures that the original order list cannot be modified by external code.
To prevent modifications from outside the class, return a copy or an unmodifiable view of a collection. This ensures that the internal collection remains unchanged. For example, in a Customer class, returning Collections.unmodifiableList(orders) from getOrders method ensures that the original order list cannot be modified by external code.
Topics: Code Reading and State Safety Core Java Java