How to initialize HashSet in java

We have many ways to initialize HashSet in java.
HashSet can be initialized in one line, Using constructors, Using Arrays.

1. Initialize HashSet using Constructors

package com.kscodes.sampleproject;

import java.util.HashSet;

import java.util.Set;

public class HashSetInitalize {

public static void main(String[] args) {

Set<String> hashSet = new HashSet<>();

hashSet.add("Java");

hashSet.add("Spring");

hashSet.add("Hibernate");

hashSet.add("JavaScript");

System.out.println(hashSet.toString());

}

package com.kscodes.sampleproject;

import java.util.Arrays;

import java.util.HashSet;

import java.util.Set;

public class HashSetInitalize {

public static void main(String[] args) {

Set<String> hashSet = new HashSet<>(Arrays.asList("Java", "JSP",

"JavaScript", "JQuery"));

System.out.println(hashSet.toString());

}

package com.kscodes.sampleproject;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.HashSet;

import java.util.List;

import java.util.Set;

public class HashSetInitalize {

public static void main(String[] args) {

List<String> arrList1 = new ArrayList<>(Arrays.asList("Java","JSP","JavaScript","JQuery"));

Set<String> hashSet = new HashSet<>(arrList1);

System.out.println(hashSet.toString());

}

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