In this tutorial we will see how to use the Java iterator with Set interface . We will create an example to display the contents of the set collection.

• Java Set Interface keeps the data without duplicate value.
• Its one subtype Treeset always returns sorted data.
• But the subtype HashSet doesnot return sorted data.
• It uses iterator() method to traverse the data

Example of Java Set Iterator

import java.util.*;
public class setiterator {

	public static void main(String[] args) {
		Set s = new TreeSet();
		s.add(1000);
		s.add(400);
		s.add(900);
		s.add(700);
		s.add(400);
		Iterator it = s.iterator();
		while (it.hasNext()) {
			System.out.println(it.next());
		} 
	}
}

Output

400 700 900 1000

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