Java enum的使用範例

enum Today{
 Mon(1), Tue(2), Wed(3), Thu(4), Fri(5), Sat(6), Sun(7);
 Today(int d){
  this.day=d;
 }
 private int day;
 public int getDay(){
  return day;
 }
}
class Test{
 public static void main(String[] args){
  Today t = Today.Tue;
  switch(t.getDay()){
   case 1: System.out.println("Today is Monday."); break;
   case 2: System.out.println("Today is Tuesday."); break;
   case 3: System.out.println("Today is Wednesday."); break;
   case 4: System.out.println("Today is Thursday."); break;
   case 5: System.out.println("Today is Friday."); break;
   case 6: System.out.println("Today is Saturday."); break;
   case 7: System.out.println("Today is Sunday."); break;
   default: break;
  }
 }
}

結果:
java Test
Today is Tuesday.