Java program to iterate a HashSet collection using the iterator() method

Java example to iterate a HashSet collection using the iterator() method.
Submitted by Nidhi, on May 08, 2022

Problem statement

In this program, we will create a set using the HashSet collection to store integer elements and print the created collection using the iterator() method.

Source Code

The source code to iterate a HashSet collection using the iterator() method is given below. The given program is compiled and executed successfully.

// Java program to iterate a HashSet collection 
// using iterator() method

import java.util.*;

public class Main {
  public static void main(String[] args) {

    HashSet < Integer > nums = new HashSet();

    nums.add(1);
    nums.add(2);
    nums.add(3);
    nums.add(4);

    System.out.println("Set items: ");
    Iterator < Integer > itr = nums.iterator();
    while (itr.hasNext()) {
      System.out.println(" " + itr.next());
    }
  }
}

Output

Set items: 
 1
 2
 3
 4

Explanation

In the above program, we imported the "java.util.*" package to use the HashSet collection.Here, we created a public class Main that contains a main() method.

The main() method is the entry point for the program.Here, we created a set nums to store integer data elements using HashSet collection. Then we iterated the HashSet using the iterator() method and printed the created collection.