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

Typesafe enums offer a better alternative to Java's traditional enumerated types. Here's how to use typesafe enums correctly in your Java code.

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.

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

The pattern matching feature in Java lets app developers handle complex data structures such as abstract layers and class hierarchies. Here's how it works.