juniorDesign Patterns
Creational, Structural, and Behavioral patterns: What's the difference?
Updated Apr 28, 2026
Short answer
Creational patterns deal with object creation, Structural patterns deal with object composition, and Behavioral patterns deal with communication between objects.
Deep explanation
Creational patterns abstract the instantiation process. Structural patterns explain how to assemble objects and classes into larger structures while keeping these structures flexible and efficient. Behavioral patterns focus on algorithms and the assignment of responsibilities between objects.
Real-world example
Creational: A factory building cars. Structural: Adding a trailer to a car. Behavioral: Traffic lights communicating with cars.
Common mistakes
- Misclassifying patterns, which shows a lack of understanding of the pattern's core intent.
Follow-up questions
- Which category does the Adapter pattern belong to?