The following code fragment shows that this class’s architecture is based on Float and Double static member classes, which both subclass Ellipse2D: ... the Matcher class, in java.util.regex, ...

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 ...

Java Reflection provides a lot of information about a given class at runtime; you can easily know all its super classes, implemented interfaces, methods, constructors, fields, and so on. But in ...