Additional Notes
How can you make a class with collections immutable?
Track: Java
Topic: OOP
Focus: Immutability Basics
Java: Immutability Basics
Answer
Use unmodifiable wrappers or defensive copying.
To ensure a class with collections is immutable, use Collections.unmodifiableList() or create a defensive copy before returning collections. This prevents external modification, maintaining integrity. For example, an order history should not be altered once recorded.
To ensure a class with collections is immutable, use Collections.unmodifiableList() or create a defensive copy before returning collections. This prevents external modification, maintaining integrity. For example, an order history should not be altered once recorded.
Topics: Immutability Basics Java OOP