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Java面试HashMap必考题:5分钟速通

HashMap底层结构 数组 + 链表 + 红黑树 默认容量16,负载因子0.75 链表>8且数组≥64 → 转红黑树 put流程 计算hash:key.hashCode() ^ (h >>> 16)(高低位混合) 定位桶:(n-1)

java dev.to May 23, 2026

Polymorphism

In the last post we talked about encapsulation today we are getting into polymorphism. An analogy so we have our houses right. We have a

java dev.to May 23, 2026
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