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, bring into a program ...

Java developers group related classes and interfaces into packages. Using packages makes it easier to locate and use reference types, avoid name conflicts between same-named types, and control ...

Another approach could be a package-private superclass in the JDK ... and clarify the intended usage patterns for developers using the code. Sealed classes in Java represent a significant step forward ...

The release of Java SE 15 in Sept 2020 will introduce ... class and must be in the same module as the sealed class (or in the same package, if in the unnamed module.) This requirement effectively ...