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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:Set the methods in the above multiple factory method modes to static, and call them directly without creating instances.口径？翘儿饶有兴致地问道，就是炮口有多大么？对。惟馨老师，我们网站非常有诚意想要邀请你。来自韩国的全彩熙和新加坡的袁斯朗，两位不同背景的女孩先后来到苏州，与苏州一位男孩邝良不期而遇，并与苏绣结下不解之缘，由此，上演了一场围绕苏绣珍品天堂绣而展开的曲折离奇故事。《荒野生存》改编自著名作家乔恩·科莱考尔(Jon Krakauer)的散文集，是一个真实事件，说的是一个名叫克里斯多弗的男子(埃米尔·赫斯基饰)1992年大学毕业后，毅然舍弃了所有的财产，投身到阿拉斯加州的茫茫荒野中，体验回归自然的生活。四个月后，人们在一个偏僻的野营地的一辆废弃的公共汽车上，发现了他的尸体。威廉·赫特和玛西娅·盖伊·哈登分别扮演克里斯多弗的父母。When Python is programmed, it often deals with files and directories, which cannot be separated from OS modules. The OS module contains common operating system functions, independent of the specific platform. The following is a list of commonly used commands