The largest wealth transfer in history has begun. It doesn't mean you have to accept everything bequeathed to you. Here's ...

Compare inheritance and composition, the two fundamental ways to relate Java classes, then practice debugging ClassCastExceptions in Java inheritance.

Though Java prevents multiple inheritance, some circumstances warrant its use. In this article, author Thomas Hammell illustrates a technique for simulating multiple inheritance in a Web-based ...

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work.

It's not good enough to simply use inheritance and apply the rules of polymorphism to your code. To write SOLID code, and properly implement the Liskov substitution principle in Java, your code must ...