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Java:ConcurrentHashMap 的 initTable 方法末尾的 n - (n >>> 2) 是什么意思?

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n 等于 16,通过 sc = n - (n >>> 2) 将 sc 赋值为 12,请问 n - (n >>> 2) 是什么高端写法?为什么要这么写?请大佬赐教


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>>> 无符号移位操作 这个就相当于 n-(n/(2^2))


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