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标签：HashSet 源码分析

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HashSet 源码分析，HashSet 原理分析

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1、HashSet概述： 　　HashSet实现Set接口，由哈希表（实际上是一个HashMap实例）支持。它不保证set 的迭代顺序；特别是它不保证该顺序恒久不变。此类允许使用null元素。HashSet中不允许有重复元素，这是因为Has...

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