It’s not easy to keep up with Java’s frequent feature releases. If you missed sealed classes, text blocks, records, the new string methods, or the Optional class, let’s fix that.

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

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.