Providing fields and methods in an enum type

The above enum type could then be used in the following way:

0548: public class DayProg                                         // DayProg.java
0549: {
0550:    public static void main(String[] pArgs)
0551:    {
0552:       System.out.println("getFirst: " + Day.getFirst());
0553:       Day tToday = Day.Wednesday;
0554:       System.out.println("tToday.isLast: " + tToday.isLast());
0555:       System.out.println("Day.Saturday.isLast: " + Day.Saturday.isLast());      
0556:       for (Day tDay : Day.values())
0557:       {
0558:          System.out.print(tDay.getNext() + " ");
0559:       }
0560:       System.out.println();
0561:    }
0562: }

The above code outputs:

0563: getFirst: Sun
0564: tToday.isLast: false
0565: Day.Saturday.isLast: true
0566: Mon Tue Wed Thu Fri Sat Sun