Software Design Patterns

The core idea here is that good object-oriented design isn't invented from scratch every time — recurring problems have battle-tested solutions, and this course teaches you to recognize when to reach for Observer, Decorator, Factory, Singleton, Command, and the rest of the Gang-of-Four catalog instead of writing tangled code. You'll work through Head First-style examples in Java, take a midterm and final, and build a project that forces you to justify which patterns fit and which would be overkill. Coming in with solid OOP from earlier CTIS courses, this is where you stop just writing classes that work and start writing systems other people can extend without cursing your name.