学习 Java 面向对象编程时，最经典的练手项目之一就是图书馆管理系统。本项目用纯 Java 实现了一个控制台交互的图书管理程序，通过接口、继承、多态等 OOP 特性设计了完整的用户角色和操作体系——管理员可以增删查看图书，普通用户可以查找、借阅和归还图书 ...

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