《城堡游戏》是一个相当简单、易上手的学习游戏，通过游戏的设计，让学习者初步了解Java的设计原则，如何封装和提高可扩展性。-Castle game is a very simple, easy to learn the game, through the design of the game, allowing learners to understand the principles of Java design, how to package and improve scalability.