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以下是哈希函数的源代码java.util.HashMap.评论很好地解释了它的成就.但怎么样？什么是^和>>>运营商在做什么？有人可以解释代码实际上如何做评论所说的内容吗？

/**
 * Applies a supplemental hash function to a given hashCode, which
 * defends against poor quality hash functions.  This is critical
 * because HashMap uses power-of-two length hash tables, that
 * otherwise encounter collisions for hashCodes that do not differ
 * in lower bits. Note: Null keys always map to hash 0, thus index 0.
 */
static int hash(int h) {
    // This function ensures …