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集...
public static void main(String args[]) { Set sethash = new HashSet(); for (int i = MAX; i >= MIN; i--) { sethash.add(new Integer(i*i)); } System.out.println("HashSet = " + sethash); Set setlink = new LinkedHashSet(); for (int i = MAX; i >= MIN; i--) { se...
LinkedHashSetis in some sense intermediate between HashSet and TreeSet. Implemented as aHashTablewith a linked list running through it, however it provides insertion-ordered iteration which is not same as sorted traversal guaranteed by TreeSet. So choice of usage depends entirely on your needs bu...
HashSet example importjava.util.HashSet;classHashSetDemo{publicstaticvoidmain(String[]args){// Create a HashSetHashSet<String>hset=newHashSet<String>();//add elements to HashSethset.add("AA");hset.add("BB");hset.add("CC");hset.add("DD");// Displaying HashSet elementsSystem.out.prin...
Popular implementation ofSetinterface includesHashSet,TreeSetandLinkedHashSet. List allows any number ofnullvalues.Setcan have only a singlenullvalue at most. ListIteratorcan be used to traverse aListin both the directions(forward and backward). However, it cannot be used to traverse aSet. We ca...
The source code to find the difference between two HashSets is given below. The given program is compiled and executed successfully.// Rust program to find the difference // between two HashSets use std::collections::HashSet; fn main() { let set1: HashSet<_> = [10, 15, 30, 20,...
Set implementations:HashSet,LinkedHashSet,TreeSetetc. 4) List allows any number of null values. Set can have only a single null value at most. 5)ListIteratorcan be used to traverse a List in both the directions(forward and backward) However it can not be used to traverse a Set. We ca...
ArrayList and LinkedList are the two most popular used List implementations while LinkedHashSet, TreeSet, and HashSet are frequently used Set implementations. In this Java article, we will see the difference between Map, Set, and List in Java and learn when to use List, Set, or Map. ...
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The source code to find the Symmetric difference between two HashSets is given below. The given program is compiled and executed successfully. // Rust program to find the Symmetric// difference between two HashSetsusestd::collections::HashSet;fnmain() {letset1:HashSet<_>=[10,15,30,20,12...