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Understanding Factory Method Patterns: All Factory Method Patterns are used to create objects. The factory method pattern encapsulates the object creation process by letting subclasses decide what the created object is. The factory method pattern has the following roles:在首集中，洛杉矶国际机场发生一场危机，数十架航班无法着陆，美国政府决定召集O’Brien和他的团队出面解决这个问题。这是他们第一次在「实战」中大显身手！与此同时，O’Brien第一次见到Paige和她的儿子。The intermediary mode is also used to reduce the coupling between classes, because if there is a dependency relationship between classes, it is not conducive to the expansion and maintenance of functions, because as long as one object is modified, other related objects have to be modified. If you use the mediator mode, you just need to care about the relationship with the Mediator class, the relationship between specific classes and the scheduling to the Mediator, which is a bit like the spring container. Let's look at the picture first:A friend upstairs in my house is especially fun. He often jokes about his elders after reading the popular article "The Gate of the Rising Passage of Class Is Coming to Close" recently.