How to use TreeSet in java

import java.util.ArrayList;
import java.util.Iterator;
import java.util.TreeSet;


public class TreeSetExample {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        TreeSet<String> name=new TreeSet<>();
        name.add("Dx");
        name.add("Ravi");
        name.add("mitul");
        name.add("Dhaval");
        name.add("Bittu");
       
        Iterator<String> it=name.iterator();
        while(it.hasNext())
        {
            System.out.println(it.next());
        }
    }

}