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HashSet iterator() Method in Java

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  • Difficulty Level : Basic
  • Last Updated : 26 Nov, 2018
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The Java.util.HashSet.iterator() method is used to return an iterator of the same elements as the hash set. The elements are returned in random order from what present in the hash set.

Syntax:

Iterator iterate_value = Hash_Set.iterator();

Parameters: The function does not take any parameter.

Return Value: The method iterates over the elements of the hash set and returns the values(iterators).

Below program illustrate the Java.util.HashSet.iterator() method:




// Java code to illustrate iterator()
import java.util.*;
import java.util.HashSet;
  
public class HashSetDemo {
    public static void main(String args[])
    {
        // Creating an empty HashSet
        HashSet<String> set = new HashSet<String>();
  
        // Use add() method to add elements into the Set
        set.add("Welcome");
        set.add("To");
        set.add("Geeks");
        set.add("4");
        set.add("Geeks");
  
        // Displaying the HashSet
        System.out.println("HashSet: " + set);
  
        // Creating an iterator
        Iterator value = set.iterator();
  
        // Displaying the values after iterating through the set
        System.out.println("The iterator values are: ");
        while (value.hasNext()) {
            System.out.println(value.next());
        }
    }
}

Output:

HashSet: [4, Geeks, Welcome, To]
The iterator values are: 
4
Geeks
Welcome
To
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