Java初学者教程（英文版）- 16

Java Tutorial for Beginners Lesson 16: Packages What we will learn from this lesson: - Like Organizing Files into Folders - Preventing Naming Conflicts - Bundling Related Items into Groups - Classes, Interfaces, Enums, ... - Package Naming Convention - Reversed Internet Domain Name - package Keyword - import Keyword - Built-in Packages: java, lang, io, util