1. public enum Title {2.   MR("Mr."), MRS("Mrs."), MS("Ms.");3.   private final String title;4.   private Title(String t) { title = t; }5.   public String format(String last, String first) {6.    return title + " " + first + " " + last;7.   }8. }9. public static void main(String[] args) {10.   System.out.println(Title.MR.format("Doe", "John"));11. }