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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:　　秦国，赫赫有名的秦昭襄王寿终正寝，重病中的太子安国君即位称王，并立庶出的公子异人为太子，出身楚国王族的王后华阳夫人执掌了国政大权。她也是异人的嫡母。I wrote down my point of view in the interview notebook, and Zhao Mingkai went on to say after reading my writing:爱我你怕了吗总而言之，现在越国的处境还算是不错的，还有很大的发展潜力，对此尹旭还是比较满意了。} catch (ClassNotFoundException e) {These games can be played on the computer. The so-called PC360 mode is that when connecting the PC360 handle, it will be recognized as the Xbox360 handle and the keys will be automatically set. The keys are all set according to the keys on the Xbox360. The key prompt will also become a handle icon.