The Java 2 SDK organizes its vast collection of classes and interfaces into a tree-like hierarchy of packages within packages, which is equivalent to directories within directories.

Nesting classes in interfaces. One of Java’s stranger language features is the ability to nest a class inside an interface. As with a nested interface, the nested class is implicitly public and ...

This application demonstrates how and why abstract, interface and generic classes and methoods can be used in java. An abstract class is a class you can't instantiate, you can't create objects from ...

This repo contains a program to compute the reflexive transitive closure under API dependency of a collection of Java classes (and interfaces). One class's API is said to (directly) depend on ...

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...

Investigates the separation between types and classes by putting to use a special feature of Java regarding classes, interfaces and inheritance. We propose an original method which, from a single ...

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 ...