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

Use Java's packages and static imports to organize top-level types and simplify access to their static members.

In Java, a package can contain other packages, classes, or both. When modeling, you’ll typically have logical packages that serve primarily to organize your model.

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.

The Java Platform provides the most commonly used data structures in the form of the Collections Framework, and it provides a rich API to operate on them. This article explains the concepts behind ...