Structural Patterns: Compose Objects and Interfaces
Compare Adapter, Bridge, Composite, Decorator, Facade, Flyweight, and Proxy with Java examples, costs, failure modes, and guidance for choosing a fit.
Posts tagged with #object-oriented-design
Tell, Don't Ask and the Law of Demeter
Apply Tell, Don't Ask and the Law of Demeter to keep object rules near their data, reduce fragile navigation, and see when a direct query is clearer in context.
Testable Object Design and Collaborator Seams
Learn to design object-oriented code around behavior, collaborator boundaries, and stable dependency seams, with practical tests that resist refactoring churn.
Value Objects, Entities, and Aggregates
Learn how identity, value equality, and aggregate boundaries shape a reliable order model, with Java code, trade-offs, failure cases, and design checks.