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Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.You can click the move command, or click Modify to have a move in the drop-down, or enter M Enter to execute the move command./calm (sedation)Jia Hongwei, male, 24 years old, from Henan, lives in Shenzhen秦淼这时才指着前面，哭着道：师姐朝那边跑了。