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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.　　面对前所未有的危机，能拯救人类的只有那群战士。凌驾前作的规模，前所未见的动作场面，不该有交集的英雄们终于相遇。谜团重重的故事即将解开绿菠天真又好奇，指指她的眼睛，又张开双臂仰天比划了一下，道：黛丝，你的眼睛像天空一样蓝。描述因冤罪而人生疯狂决定自行了断的男人和让人联想到雪女的谜一般的名流妻子之间奇妙的两人之旅，剧中也会描绘文学性、悬疑性十足的爱情故事。不久的未来，亚洲某地。一个科学家组织秘密实行了“尼安德特计划”：将得了绝症的顶级科学家暂时冰冻，以备将来科学发达之后进行康复救助。主人公韩午阳目前是某世界刑事情报组织亚洲区某局的骨干成员。他在一次行动中发现了装有冰冻老人的神秘箱子，潘多拉的魔盒逐渐开启……Hello, landlord! I have not encountered such problems myself, and of course I have no experience. I have a website here that can be consulted. You can go and have a look, which may be helpful.Right-click the meta-information-tick off the receiving shadow;