Java’s single inheritance limitation is usually not a problem in the normal course of development. In fact, the need to use multiple inheritance could be a sign of a bad design.

The first half of this tutorial introduced the basics of inheritance in Java. You learned how to use Java’s extends and super keywords to derive a child class from a parent class, invoke parent ...

Sealed classes make Java an even more powerful and expressive language and set the stage for even more sophisticated techniques such as pattern matching, which we'll explore in a subsequent article. A ...