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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.NHK連続テレビ小説『あまちゃん』の脚本を手掛けた宮藤官九郎（46）が、初めて大河ドラマの脚本に挑む、2019年放送の第58作目のタイトルが『いだてん～東京オリムピック噺（ばなし）～』に決定し、主演が、中村勘九郎（35）と阿部サダヲ（46）に決まった。在郑昊进攻蕃国不久，邻近的南雀国就得到了消息。众人哄笑，板栗咳嗽一声道：我还没享福哩，你就说我折福了。Anyway, the smell is very bad. I feel that the worst smell I have ever smelled in my life is it, but it is all a small meaning. It took me a few minutes to feel sick and uncomfortable. The Vietnamese army's attack started again. From this onwards, it can also be said to be the most difficult period in the defense war of the whole 142 position. "Zhao Mingkai said.韩信淡淡一笑，本来这个时候不想提及的，但是里李左车自己开口问了，那就是另外一回事情了。The above has already given detailed examples and described how to manage IPTables rules. In order to review quickly in the future, we will summarize the above commands.