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In fact, each design pattern is a very important idea, which looks very familiar. In fact, it is because what we have learned is involved. Although sometimes we don't know it, it is actually reflected everywhere in Java's own design, such as AWT, JDBC, collection class, IO pipeline or Web framework, in which design patterns are everywhere. Because of our limited space, it is difficult to talk about every design pattern in great detail, but I will try my best to write down the meaning clearly in the limited space and space so as to make everyone understand better. If there is no accident in this chapter, it should be the last talk of the design pattern. First of all, it should be the figure at the beginning of the previous article:Let's take the figure as an example to see which tables all the rules on the prerouting "chain" exist in.有关Sara命运的流言在整个夏天到处蔓延，有官方消息透露，在新一季的第三集会出现一个新的女性角色，制片主任Carol Mendelsohn说，这个新角色可能是现场调查人员或是技术分析人员。但同样也不肯透露Sara的命运终究如何。　　豪强为救豪杰中枪。唐英明得知后大怒，开枪打了豪杰，唐英明趁豪杰受伤决定让胡南带豪杰去香港戒烟，也好逃开巡捕的追捕。B) Design principles. Many people have listed seven principles, such as single duty principle, opening and closing principle, Richter substitution principle, dependence inversion principle, interface isolation principle, composite reuse principle and Dimit principle. LSP, I elevated it to one of the three cornerstones of the object-oriented paradigm; Single responsibility and interface isolation are mainly used as the principle of responsibility division in object-oriented analysis/OOA, which you can not pay much attention to at this time. Relying on the inversion principle, I throw it away as garbage, because the opening and closing principle or directly "relying on abstract type principle" already contains the essence of relying on the inversion principle, while the dross of relying on the inversion principle is inherited by IoC. Of course, the pullback, I emphasize very much. Therefore, you need to master the abstract dependency principle (OCP), one-way dependency principle (including the learning of callbacks) and the minimum dependency principle (composite reuse principle, Dimit rule).世界首次以女子高尔夫为主题的原创动画系列，开幕！