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One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.BaiDuInterview.init ();(2) Organizing or abetting others to defraud medical security fund expenditures, causing adverse social impacts;Behavior patterns of objects-Use object aggregation to allocate behaviors.周青在天庭看过不少神仙，但少有哪一个比这青年道人更有道意。Telecommunications《家有父母》每集成本10万元,这对情景剧来说已是很不错了,但能否超越《家有儿女》,投资方有信心也有压力,信心是目前这部片子已被多家购片方看好,如杭州电视台已预先支付了购片定金当然是《家有儿女》先入为主,观众希望看到原来的“儿女”们在剧中出现,为此投资方目前正在动用他们在北京的人脉关系,到时请那些身价不菲的“儿女”们来剧中客串一把