Here's how to make classes, fields, methods, constructors, and objects work together in your Java programs.

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

Here's everything you need to know about initializing Java classes and objects before executing them in the JVM.

Let’s assume that we want to give our objects more functionality and add behaviors and attributes that represent each animal that the objects represent.

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.

This post explains how to call a method in Java. Learn how to define methods, call them from other classes, and pass arguments!

Reference objects aren't just useful when memory is at a premium; they can also be used to provide slick caching abilities to any application.