This post explains how to use classes in Java to build objects and organize your code. Also learn: constructors, ... And we can run that code multiple times to create multiple bad guys.

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.

Sealed classes make Java an even more powerful and expressive language and set the stage for even more sophisticated techniques such as pattern matching, which we'll explore in a subsequent article. A ...