在HashMap源码中，hash(Object key)方法的代码如下：
static final int hash(Object key) { int h; return (key == null) ? 0 : (h = key.hashCode()) ^ (h >>> 16); }
我的问题是为什么不直接使用key.hashCode()拿到哈希值，反而在后面追加 ^ (h >>> 16)处理，为什么要这么做以及能带来什么好处？谢谢！
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You can read this article, specifically about HashMap, How does a HashMap work in JAVA
HashMap
About the implementation you see, it is the java8 version, it was not like this before.
java8
Still the article above, please pay attention to the following chapters:
It should be helpful for you to understand
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You can read this article, specifically about
HashMap, How does a HashMap work in JAVAAbout the implementation you see, it is the
java8version, it was not like this before.Still the article above, please pay attention to the following chapters:
It should be helpful for you to understand