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

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

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.

Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.