java中的和有什么区别？ [重复]

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• What's the difference between <?> and <? extends Object> in Java Generics? 3 answers

和 ? 3个答案

In Java generics, What is the advantage of using class GenericStack<T extends Object> {} over class GenericStack<T>{}.

在Java泛型中,使用类GenericStack {}优于类GenericStack {}的优点是什么。

I have implemented a generic stack using both of the above approaches but unable to trace out the difference. Help me to understand this.

我已经使用上述两种方法实现了泛型堆栈,但无法找出差异。帮我理解这个。

1 个解决方案

#1

There's no difference. <T> and <T extends Object> are equivalent.

没有区别。 和 是等价的。