一个 TreeSet 实现是基于一个 TreeMap 实现为红黑树,以及 LinkedHashSet 使用哈希表和双向链表实现。 两个都 HashSet 和LinkedHashSet 类实现 Set 接口,而 TreeSet 实现NavigableSet 界面。 2.迭代顺序 之间最重要的区别 HashSet, TreeSet,和 LinkedHashSet 类在于其迭代器返回集合内容的顺序。 HashSet 不保证...
LinkedHashSetis in some sense intermediate betweenHashSetandTreeSet. Implemented as a hash table with a linked list running through it, howeverit provides insertion-ordered iteration which is not same as sorted traversal guaranteed by TreeSet. So choice of usage depends entirely on your needs but...
HashSet is a good choice for representing sets if you don't care about element ordering. But if ordering is important, then LinkedHashSet or TreeSet are better choices. However, LinkedHashSet or TreeSet come with an additional speed and space cost....
LinkedHashSet1: [2, 3] LinkedHashSet2: [2, 4] Intersection is: [2] Difference of Sets To calculate the difference between the two sets, we can use the removeAll() method. For example, import java.util.LinkedHashSet; class Main { public static void main(String[] args) { LinkedHash...
HashSet、LinkedHashSet 和 TreeSet 是主要用于存储元素的集合接口类。HashSet − HashSet 是一个容器实例,它仅以非同步方式存储唯一元素,以处理与集合相关的高性能操作。集合允许不遵循插入顺序的空值。 LinkedHashSet − LinkedHashSet 是一个克隆数据结构,它同时具有哈希表和链接列表的功能作为...