Compare inheritance and composition, the two fundamental ways to relate Java classes, then practice debugging ClassCastExceptions in Java inheritance. Topics Spotlight: AI-ready data centers ...

Polymorphism—or an object’s ability to execute specialized actions based on its type—is what makes Java code flexible.Many design patterns created by the Gang Of Four rely on some form of ...

Sealed classes, proposed in JEP 409 and available since Java 17, let developers limit and control how deeply a component's type hierarchy can extend. With sealed classes, a developer can essentially ...