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HashSet:Set接口的实现
实现Collection接口的Set,其中HashSet是其常用的具体类之一。 1、 Set接口继承自Collection接口,用于存储无序且不重复的元素,其特性与数学中的集合概念相似,即不允许存在重复成员。该接口有三种常见的实现类:HashSet、LinkedHashSet和TreeSet。其中,HashSet基于哈希表 ...
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