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it also provides advanced features such as interfaces and generics. these features can help us further refine type judgment and improve the readability and maintainability of the code. interface interface is a special class. it only defines method signatures without any method implementation. the interface is used to define a contract that a group of objects must comply with. we can use it through PS name: PPT、 anhua zhihui (beijing) education technology group co., ltd.--a one-stop service platform for vocational education
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