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小丫与廖平凡毕业后，一起在工作岗位上打拼了多年。廖平凡以各种理由推诿拖延婚事。今年，廖平凡又说等来年混好了再正式提亲，小丫一气之下应征了二麻租媳妇的这档子事儿。The code for creating the object is encapsulated and the specific factory class is instantiated, thus achieving the purpose of encapsulation and instantiation. Encapsulating the code that creates the object in one place can also achieve the purpose of reuse and is more convenient for later maintenance. This also means that when the customer instantiates the object, he will only rely on the interface and not on the specific implementation. Help us to better achieve interface programming rather than implementation, making the code more flexible to cope with future extensions.If I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.A men's 12 still water events: 500m single kayak, 500m double kayak, 1000m single kayak, 1000m double kayak, 1000m four kayak; 500-meter single rowing, 500-meter double rowing, 1000-meter single rowing and 1000-meter double rowing; Jet Roundabout Events: Single Kayak, Single Canoe, Double Canoe;本乡猛的未来被扭曲了。众人听了都笑。