Get highest value stored in TreeSet in Java

/*from w  ww  . j a v  a 2  s  .c om*/
import java.util.TreeSet;

public class Main {
  public static void main(String[] args) {
    TreeSet<String> tSet = new TreeSet<String>();

    tSet.add("1");
    tSet.add("5");
    tSet.add("2");
    tSet.add("3");
    tSet.add("4");

    System.out.println("Highest value Stored in Java TreeSet is : " + tSet.last());
  }
}