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The reason why the logic for creating an object is put into a separate class is that it can be used by multiple clients. And separates the creation and use of objects. However, this design also has many defects. First of all, SimpleFactory is a specific class, so we must program for the implementation, making the system lose its flexibility in this respect. Second, if we add new products, we have to modify the code in SimpleFactory, which violates the opening and closing principle. The above model is also called simple factory. He does not appear in GOF mode, it is more like a programming habit.范青只是听着没有说话。Limit 15 and its accessories《六十天指定幸存者》在原版主要故事情节的基础上，加入了更多有关韩国国情的元素。这是一个关于政治家的故事，他突然从环境部长晋升到了总统，因为在国会上发生的一次爆炸中，排在他前面的总统候选人都罹难身亡。朴木镇原本是位科学家，如今身为政客的他必须努力融入政坛。在朴木镇代任总统的 60 天中，尽管经验不足并且不情不愿，他还是想努力揭开袭击背后的真相。在朝鲜时代，很多人要与素未谋面的人结婚并相伴一生。基于这种原因，有时结婚对像被掉包都可能无从知晓。而如果掉包对像是男人！横冲直撞的新婚生活轻喜剧，一对壁人成为父母政治婚姻的牺牲品，婚礼上才发现新娘是男人？却在慢慢接触中对彼此产生了微妙的依恋…沙加路为本国讨好教皇不假，真实意图为借着杨长帆制造的混乱局面觊觎东海的主动权。