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

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.

Using generics results in more robust code and avoids ClassCastExceptions in your Java programs. This in-depth tutorial introduces you to generics and their types and methods.

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 ...

To use other classes in the java.util package, you must add explicit imports of those classes. For the sake of simplicity, I recommend new developers use the wildcard approach wto import the Java ...