Create packages, import packaged classes and interfaces into your programs, move packages, and encapsulate them in jar files.

Java interfaces are different from classes, and it’s important to know how to use their special properties in your Java programs. This tutorial introduces the difference between classes and ...

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.

Java API use of the UnaryOperator function With functions now tightly embedded throughout the Java API, interfaces such as the aforementioned Consumer interface, and the current UnaryOperator tend to ...