Java
Replacing Conditionals with Polymorphism
Replace complex switch statements and if-else chains with polymorphic designs (Strategy, State, Pattern Matching) that are easier to extend and maintain.
Java
Extract Method, Class, and Interface
Master the three fundamental extraction refactorings (Method, Class, Interface) with step-by-step techniques for breaking down complex code into testable components.
Java
Code Smells Catalog
Comprehensive catalog of 22 core code smells organized by categories (bloaters, OO abusers, change preventers, dispensables, couplers) with detection and refactoring guidance.