Why the parent class reference can point to a subclass reference to subclass object can not point to the parent class object generics - Code World

Why the parent class reference can point to a subclass reference to subclass object can not point to the parent class object generics

Others 2020-04-01 10:36:20 views: null

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Origin www.cnblogs.com/skyblue123/p/12610641.html

Why the parent class reference can point to a subclass reference to subclass object can not point to the parent class object generics

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