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HashMap与Hashtable及List、Set区别
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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