To gain access to all the public classes in another package.

 

import packageName.*

1.	The general form of a package definition directive
2.	Global Scope: Code placed directly outside a package body or at the top-level of a package body resides in the global scope.
3.	package level function
4.	Packages groups classes
5.	Variables, functions, and namespace declarations can also be contained inside packages.
6.	A package-level function
7.	Import all the classes in a particular package by using the wildcard operator (*) trailing the package name
8.	References to the classes by using their full name

To gain access to all the public classes in another package. : package « Language « Flash / Flex / ActionScript