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uesowys
计算机科技研究员
5 年前
trueuesowys

The oriented object programming includes features of inheritance,and encapsulation, and polymorphism. But if the nest of your class has too much levels,it will affect the extendabily.
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You can use the static key-word to expose the nested class to be a top-level class and then refer it with the same path as path of package.