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One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code."So, the death rate of this flying insect is quite high, have you been stung? Did your protective gear play a role in resisting their attacks?" I asked.台北一家私立医院林院长的儿子文祥。碍于父命，进山到一座与林家有世交的尼姑庵去温课。一天傍晚，文祥正在洗浴，突然一女子一闪不见了，并扔下一句恼怒的训斥。这女子名叫素碧。日后，素碧在文祥面前总是一脸冰霜。本作是私立菊玲学园高等学校雇佣的日本史担当的兼职讲师？本剧是以远藤一诚为主人公的校园剧。穿着湿漉漉的上学，带着其他上课的学生去采蘑菇，改造理科教室的人体模型做拳击练习用具等，完全不懂气氛，完全不做教师的样子的他，把烦恼重重的人们问到“为什么现在在那里？”的地方邀请的情况被描绘。In the source code, MotionEvent is a click event, and the distribution of click events is the distribution and delivery process of MotionEvent objects.