Object-Oriented Design & Design Patterns Roadmap
Learn object-oriented design from core modeling principles through SOLID, GRASP, GoF patterns, refactoring, and a practical design capstone.
Posts tagged with #object-oriented-design
Behavioral Patterns: Organize Collaboration
Compare all eleven GoF behavioral patterns by the change they isolate, the coupling they reduce, and the runtime costs they add to a system in real code.
Choosing, Combining, and Removing Patterns
Choose GoF patterns by tracing change pressure, comparing direct code with pattern roles, and removing abstractions when maintenance costs exceed their value.
Class Diagrams for Design Conversations
Use a compact UML class diagram to discuss ownership, multiplicity, and dependencies in object-oriented designs before those choices harden into code.
Creational Patterns: Control Object Creation
Compare five creational patterns, see a compact TypeScript example, and choose the simplest fit for product families, construction, copying, or shared state.
Design Review: Trade-Offs and Maintainability
Review object designs for change, coupling, cohesion, tests, performance, operations, and security using a worked example and the practical checklist.
Discovering Domain Concepts and Behaviors
Turn use cases and domain language into a small, behavior-rich model. Learn how to find candidates, protect invariants, and avoid making every noun a class.
GRASP: Assigning Object Responsibilities
Learn all nine GRASP patterns through a Java order workflow, with code, trade-offs, failure cases, and design review questions for intermediate developers.
Refactoring Toward Patterns Safely
Refactor toward design patterns safely: follow evidence of change, preserve behavior with tests, and make small transformations before adding an abstraction.
SOLID Principles in Practice
Apply all five SOLID principles to a small checkout design, see where they help, and learn when extra interfaces or indirection make code harder to change.