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It's a trivial matter.英武帝微微颔首道：如此，爱卿先将朕刚交代的事完成。Factory method pattern refers to defining a factory interface that creates an object. Its subclasses determine the classes to instantiate and postpone the actual creation to the subclasses. It emphasizes the change of "single object". The main points of its implementation include:描述OL藤原沙织的家突然出现穿越时空的「源氏物语」登场的平安贵族光源氏。At this time, many people think that gender affects the classification ability of babies, but Professors Heron and Slaughter do not think so. They think that the difference in classification ability of babies of different genders is not due to gender, but due to the different knowledge and experience they have acquired. For example, the fact that male babies can classify cars may be that they pay more attention to the color and wheel movement of toy cars and pay less attention to the information of dolls.Next, we will finish writing other codes. First, we will define the Upload class. The objects that control the upload process will be created from the Upload class:Move