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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:(1) 3D Material Library: http://www.3dczk.com/你只要不定日子地找两天，在众人眼前露一露就成了。Invoke invokes the delegate's instance method to execute the method他登岸谈判的地点从九州变到了澎湖，从澎湖变到了马尼拉，现在又从马尼拉变到了安汶，是不是这样下去，要不了多久就可以换杨长帆来里斯本登岸了？想面带微笑，但在总督府中见到杨长帆和卡内利亚斯、帕略塔两位同胞时，沙加路怎么都笑不出来。还有，我先去休息一下。Use fire and electricity