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PECS原理

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用户7375687892

#1 Created at ... [Delete] [Delete and Lock User]

其实PECS原因就是java向上转型安全，而向下转型不安全

都怪我太好

#2 Created at ... [Delete] [Delete and Lock User]

正确的，在学c++的时候了解过，我理解的核心就是你说的这句

李大胖

#3 Created at ... [Delete] [Delete and Lock User]

是这样的，这样就很好记。

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