Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

However, Java refers to class libraries as packages. This article explores packages; I show you how to create packages of classes and interfaces, how to import (that is, ...

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.