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现在，Ura back在厌倦了此类SNS的人们中很受欢迎！Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:小头爸爸带全家去俄罗斯出差，大头儿子在俄罗斯发现了自己画的白夜城是真实存在的，一家人半路遇到交通事故，被迫夜宿小旅馆，第二天醒来发现身处大头儿子画中的世界——白夜城。他们发现如果不解决白夜城中的危机便无法走出这个世界，一家人在白夜城中经历了重重困难终于回到了现实世界。在整个AFL历史上最具挑战性的赛季之一中，跟随六支澳大利亚足球联赛球队的标志性AFL身份迈向2020年总决赛。我就跟他们说，好像进了济世堂，也没说一准儿就进了。于是坐了下来，刘井儿就在她对面草地上坐了。Instantiate the corresponding object instance based on the class name using the reflected API