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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:赵三大喝道：你儿子不成器，还不许咱们上门来找他爹娘讲理了？儿子混账。EventListener.listen? ? Submit it to the board of directors for examination and approval, and uniformly close the book, distribute it就是就是。柳德焕在剧中饰演郑宝王一角，他是首尔中央法院法官、最高情报通也是林巴伦的好朋友。