1 import java.util.*; 2 public class Demo13{ 3 4 5 public static void main(String[] args) { 6 7 Weekday day = Weekday.SUN; 8 9 //将enum类型用于switch语句 10 //因为枚举类天生具有类型信息和有限个枚举常量,所以比int、String类型更适合用在switch语句中: 11 switch(day){ 12 //注意:case 后面是空格 加上常量 最后冒号 13 case MON: 14 case TUE: 15 case WED: 16 case THU: 17 case FRI: 18 System.out.println("Today is " + day +". Work at office!"); 19 break; 20 case SAT: 21 case SUN: 22 System.out.println("Today is " + day +". Work at home!"); 23 break; 24 default: 25 System.out.println("cannot process " + day); 26 } 27 } 28 } 29 30 enum Weekday{ 31 MON,TUE,WED,THU,FRI,SAT,SUN; 32 }