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2. SingleTopThe 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.她心里一紧，盯着那孩子细看。该剧讲述了一对经济拮据的夫妇Gemma (Thalissa Teixeira饰)和Kieran (Gary Carr饰)决定将他们的小公寓开放给第三个住户的故事。令人惊讶的是，新居民Ray (Ariane Labed饰)似乎让这对夫妇的生活变得更容易了。她让公寓感觉更大，而不是更小，多出来的一双手让生活更轻松。但他们很快就开始了一段多角恋关系，每个居民都发现自己学会了用一种全新的方式来处理爱情和关系。任职警界的硕做事得过且过，其被动、消极的态度为警犬Rocky所鄙视，更处处刁难他，教他吃尽不少苦头。后Rocky在一次行动中受伤，硕于心不忍，决定收养它。　　清白无罪者前往天堂，罪孽深重者落入地狱。