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For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.1 2020年伊始，苏莱曼尼以死在中外博得大名，而其实他早已声名显赫Explain the template method mode, which means: in an abstract class, there is a main method, and then define 1... n methods, which can be abstract or actual methods, define a class, inherit the abstract class, override the abstract method, and realize the call to subclasses by calling the abstract class. First look at a diagram:动画片《少年师爷》是绍兴首部原创动画片，以水乡绍兴为背景，主人公施恩是一位机智可爱，喜欢替人打抱不平的小少年，该片讲述施恩和小伙伴们的欢乐小故事，启发观众思考，动画片制作精良，似缓缓展开的一轴绍兴特色江南画卷。绿萝自己本就擅长雌黄之术，眼神中泛起一丝欣喜。二十世纪三十年代的中国，鱼龙混杂，各国列强也虎视眈眈，江湖乱世，风起云涌。二十年前，三个热血青年，唐英明，黄大为，胡南，歃血结义，立志闯出一番天地。然而，一次爆炸后，一切开始变的不同。