In Java, nested classes are categorized as either static member classes or inner classes. Inner classes are non-static member classes, local classes, or anonymous classes.

Sealed classes, proposed in JEP 409 and available since Java 17, let developers limit and control how deeply a component's type hierarchy can extend. With sealed classes, a developer can essentially ...

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.

I've got a class in java for a swing application that extends JFrame. This class is pretty much reponsible for everything to do with a certain window in the program.

Object-oriented systems are usually partitioned into layers of related responsibilities and only dependencies in one direction are allowed, from higher layers (more specific, less reusable) to lower ...

A total of 24 JEPs in JDK 24 extend stream processing, introduce quantum-resistant algorithms and provide an API for accessing class files. Java 24 has been released at the start of the JavaOne ...