Articles

A practical guide to choosing Java collections, using generics safely, and defining reliable ordering with Comparable and Comparator.

A practical deep dive into Java inheritance and polymorphism — constructor chaining, overriding vs hiding, sealed interfaces, composition over inheritance, and the equals/hashCode/toString contracts — with the gotchas that actually bite in production.

A practical refresher on Java's core building blocks — primitive vs reference types, class vs record, interfaces, enums, packages, and access modifiers — with the gotchas that actually bite in production.