Design Patterns in Java Every Developer Should Know | Factory, Observer, Strategy

Not all design patterns are created equal. In this video, we explore 3 of the most **practical and production-worthy patterns** every developer should know: ✅ Factory Method – for decoupling object creation ✅ Observer – for building reactive, event-driven systems ✅ Strategy – for swapping algorithms cleanly at runtime These patterns aren’t just academic. They power real systems in frameworks like Spring, React, and even game engines. With crisp Java examples and visual diagrams, you'll learn when to use each, what problems they solve, and how to structure your code for flexibility and maintainability. 🎓 This is part of our **Design Patterns series** for backend engineers and system designers. My Linkedin Profile: https://www.linkedin.com/in/bytemonk/ ⏱️ Timestamps 0:00 – Intro: Why Some Patterns Actually Matter 1:02 – Factory Method Pattern: Decoupling Object Creation 3:31 – Observer Pattern: Event-Driven Architecture 6:22 – Strategy Pattern: Swapping Algorithms at Runtime 8:28 – Outro: Which Pattern Should I Cover Next? https://www.youtube.com/playlist?list=PLJq-63ZRPdBt423WbyAD1YZO0Ljo1pzvY https://www.youtube.com/playlist?list=PLJq-63ZRPdBssWTtcUlbngD_O5HaxXu6k https://www.youtube.com/playlist?list=PLJq-63ZRPdBu38EjXRXzyPat3sYMHbIWU https://www.youtube.com/playlist?list=PLJq-63ZRPdBuo5zjv9bPNLIks4tfd0Pui https://www.youtube.com/playlist?list=PLJq-63ZRPdBsPWE24vdpmgeRFMRQyjvvj https://www.youtube.com/playlist?list=PLJq-63ZRPdBslxJd-ZT12BNBDqGZgFo58 AWS Certification: AWS Certified Cloud Practioner: https://youtu.be/wF1pldkQrOY AWS Certified Solution Architect Associate: https://youtu.be/GzomXNLFgkk AWS Certified Solution Architect Professional: https://youtu.be/KFZrBxSA9tI #DesignPatterns #FactoryPattern #ObserverPattern #StrategyPattern #SystemDesign #SoftwareArchitecture #JavaPatterns #GangOfFour