Set iterator() method in Java with Examples

The java.util.Set.iterator() method is used to return an iterator of the same elements as the set. The elements are returned in random order from what present in the set.

Syntax:

Iterator iterate_value = Set.iterator();

Parameters: The function does not take any parameter.

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

Below program illustrate the java.util.Set.iterator() method:

// Java code to illustrate iterator()

import java.util.*;

public class SetDemo {
    public static void main(String args[])
    {
        // Creating an empty Set
        Set<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 Set
        System.out.println("Set: " + set);

        // Creating an iterator
        Iterator value = set.iterator();

        // Displaying the values after iterating through the iterator
        System.out.println("The iterator values are: ");
        while (value.hasNext()) {
            System.out.println(value.next());
        }
    }
}

Output:

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

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Set.html#iterator()