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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.坐好后，张大栓首先端起酒杯，举目一望——儿孙齐全，比在桃花谷还齐全，那时小儿子一家还在外地呢，因此心下十分喜悦。Bad reviews, the update is too slow, and it broke before entering the state.《CENCOROLL CONNECT》是由宇木敦哉负责监督、编剧、作画的原创动画电影，于2019年6月29日在日本上映。杰西卡遭遇高智商精神病人，她和崔西必须修复她们破裂的关系，联合起来对付他。但一场灾难性的失败揭示了她们对于英雄主义的看法充满了矛盾，并迫使她们走上了一条永远改变俩人的冲突之路。他们并不想把孔雀城给淹了。