使用前先了解哈希表的概念与原理 1、 在了解HashMap前，需先理解Map的概念。数组通过下标访问元素，而Map则通过对象进行索引。用于索引的对象称为key，与之关联的对象称为value，二者构成键值对，实现基于特定键快速查找对应值的功能。 2、 HashMap通过哈希码 ...

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