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Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.何况这些什么敌人的身份，还有他们的神奇战斗力，这些重要的消息必须要尽快地禀报龙且和项羽。Who is working for IT today?(2) TaskAffinity Attribute高中生 Paula 偷偷爱着已有男朋友的挚友 Charlotte，同时又与同学 Tim 的关系纠缠不清。成年前夕、暑假在即，这群处于成长路上的年青人，会走向什么样的未来？而 Paula 最终会选择随心而行，还是继续独自承受暗恋之苦、把秘密留给自己？导演Monja Art 首部剧情长片，一举拿下德语电影节 Max Ophüls 大奖之作──与您相约，一同回到十七岁。Prepare necessary equipment and facilities.But since then, Li Shanglong has had no contact with this person. Before long, the people in the first dormitory were at loggerheads with this person.