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

public class TreeSetExample {

    public static void main(String[] args) {

        // TreeSet return in ordered elements
        TreeSet<String> ts=new TreeSet<String>();

        ts.add("b");
        ts.add("a");
        ts.add("d");
        ts.add("c");

        // get element in Iterator
        Iterator it=ts.iterator();

        // get descending order of elements
        //Iterator it=ts.descendingIterator();

        while(it.hasNext())
        {
          String value=(String)it.next();

          System.out.println("Value :"+value);
        }
    }
}

TreeSet Value :a
TreeSet Value :b
TreeSet Value :c
TreeSet Value :d