How do I get the last element of SortedSet?

package org.kodejava.util;

import java.util.SortedSet;
import java.util.TreeSet;

public class LastSetElement {
    public static void main(String[] args) {
        SortedSet<String> numbers = new TreeSet<>();
        numbers.add("One");
        numbers.add("Two");
        numbers.add("Three");
        numbers.add("Four");
        numbers.add("Five");

        // SortedSet orders the items it contains. We can get the last
        // item from the set using the last() method. The last item 
        // will be "Two".
        String lastElement = numbers.last();
        System.out.println("lastElement = " + lastElement);
    }
}