“instanceof List"和“instanceof List"的区别和“o instanceof List<?>" [英] The difference between &quot;instanceof List&quot; and &#39;o instanceof List&lt;?&gt;&quot;

问题描述

我认为以下内容没有任何区别:

I don't see any difference in the following:

    Object o = new LinkedList<Long>();

    System.out.println(o instanceof List); 
    System.out.println(o instanceof List<?>);

当 instanceof List 不能替代时，instanceof List 有什么实际用途吗，反之亦然?

Is there any practical use of instanceof List<?> when instanceof List can't be used instead and vise versa?

推荐答案

没有区别.通配符在编译时被删除.

No difference. The wildcard is erased at compile time.

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