Java HashSet iterator() Method

The iterator() method of Java HashSet class is used to return an iterator of the same elements as the HashSet. It return elements in random order from what present in the HashSet.

Syntax

Following is the declaration of iterator() method:

Parameter

This method does not accept any parameter.

Returns

The iterator() method returns an Iterator over the elements in this set.

Exceptions

Compatibility Version

Java 1.2 and above

Example 1

import java.util.*;
public class HashSetIteratorExample1 {
	public static void main(String[] args) {
		HashSet<String> set=new HashSet<String>();  
		set.add("Ravi");  
		set.add("Vijay");  
		set.add("Mohan");  
		set.add("Ajay");  
		//Traversing elements  
		Iterator<String> itr=set.iterator();  
		while(itr.hasNext()){  
		   System.out.println(itr.next());  
		}  
	}
}

Test it Now

Output:

Vijay
Mohan
Ravi
Ajay

Example 2

import java.util.*;
public class HashSetIteratorExample2 {
	public static void main(String[] args) {
		HashSet <Integer> hashSetObject = new HashSet <>();
		hashSetObject.add(45);
		hashSetObject.add(67);
		hashSetObject.add(98);
		hashSetObject.add(24);
		//Traversing elements  
		Iterator<Integer> itr = hashSetObject.iterator();  
		while(itr.hasNext()){  
		   System.out.println("Output: "+itr.next());  
		}  
	}
}

Test it Now

Output:

Output: 98
Output: 67
Output: 24
Output: 45

Example 3

import java.util.*;
public class HashSetIteratorExample3 {
	public static void main(String[] args) throws InterruptedException {
		//Get the HashMap object
		HashSet studentSet = init();				
		//Display the contents of set
		Iterator<String> it = studentSet.iterator();
		while (it.hasNext()) {
			System.out.println(it.next());
		}
	}
	private static HashSet init() {
		//Create HashSet object
		HashSet<String> studentSet = new HashSet<>();
		//Add contents to the set
		studentSet.add("Rahul");
		studentSet.add("Mohan");
		studentSet.add("Karan");			
		return studentSet;
	}
}

Test it Now

Output: