Packages

Java allows you to organize your classes according to functionality into packages

A package is a group of class files contained in a single folder on your hard drive.

Packages are resuable; can be incorporated into more that one application. (package(s) can be distributed in form of jar file)
Packages help to avoid class name conflicts.
Packages allow you to control the extent to which other classes can access your classes (see Access Modifiers below)