public enum WeekDay {  SUN(1, "Sunday", "SUN"),  MON(2, "Monday", "MON"),  TUE(3, "Tuesday", "TUE"),  WED(4, "Wednesday", "WED"),  THU(5, "Thursday", "THU"),  FRI(6, "Friday", "FRI"),  SAT(7, "Saturday", "SAT");    private String shortName;  private String fullName;  private int dayOfWeek;  private WeekDay(int dayOfWeek, String name, String sname) {    this.dayOfWeek = dayOfWeek;    fullName = name;    shortName = sname;  }  public static WeekDay getDay(int dayIndex)   {    switch (dayIndex) {    case 1: return SUN;    case 2: return MON;    case 3: return TUE;    case 4: return WED;    case 5: return THU;    case 6: return FRI;    case 7: return SAT;    }    return null;  }  public String getShortName() {    return shortName;  }    public int getDayOfWeek() {    return dayOfWeek;  }  @Override  public String toString() {    return fullName;  }}