Use Java's extends keyword to derive a child class from a parent class, invoke parent class constructors and methods, override methods, and more.

In this tutorial you’ll learn how to work with static member classes and the three types of inner classes in your Java programs. What you’ll learn in this Java tutorial About static classes in ...

This post explains how to use classes in Java to build objects and organize your code. Also learn: constructors, static methods, and more!

However, an ideal solution would be to restrict the inheritance to a few specific classes. That's exactly where the sealed class comes into the picture. What is a sealed class? Sealed classes, ...