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

Welcome to the Java 101 study guide. This guide complements " Packages Organize Classes and Interfaces." It provides a glossary of terms specific to that article, tips and cautions, new homework ...

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.