Additional Notes
Why does a constructor in maintaining class invariants matter in this design?
Track: Java
Topic: OOP
Focus: Object Responsibility
Java: Object Responsibility
Answer
A constructor initializes object state and enforces invariants.
Constructors are responsible for setting up an object in a valid state and ensuring that all invariants hold true. In a `CartItem` class, a constructor might enforce that the quantity is always positive, preventing incorrect states from being created.
Constructors are responsible for setting up an object in a valid state and ensuring that all invariants hold true. In a `CartItem` class, a constructor might enforce that the quantity is always positive, preventing incorrect states from being created.
Topics: Java Object Responsibility OOP