// Textbook fragment 01.04
public class DayTripper {
  public enum Day {MON, TUE, WED, THU, FRI, SAT, SUN};
  public static void main(String[] args) {
    Day d = Day.MON;
    System.out.println("Initially d is " + d);
    d = Day.WED;
    System.out.println("Then it is " + d);
    Day t = Day.valueOf("WED");
    System.out.println("I say d and t are the same: " + (d == t));
  }
}