枚举类型特别实用的特性（在switch语句内使用）

枚举类型可以在switch语句内使用，如下代码：

     1.枚举类

      

 public enum Season
 {

     SPRING, SUMMER, FALL, WINTER
 }

    

      2.switch语句内使用:

 public class EnumTest
 {

     private Season season;

     public EnumTest(Season season)
     {
         this.season = season;
     }

     public void displaySeason()
     {
         switch (season) {
         case SPRING:
              System.out.println("春天花会开");
             break;
         case SUMMER:
             System.out.println("炎热的夏天");
             break;
         case FALL:
             System.out.println("秋天扫落叶");
             break;
         case WINTER:
             System.out.println("寒冷的冬天");
             break;
         default:
             break;
         }
     }
     /**
      * @param args
      */
     public static void main(String[] args)
     {
         // TODO Auto-generated method stub

         //values方法列举枚举常量，ordinal方法为枚举常量的声明顺序
         for (Season s : Season.values())
         {
             System.out.println(s + " ,ordinal " + s.ordinal());
         }

         EnumTest
         spring = new EnumTest(Season.SPRING),
         summer = new EnumTest(Season.SUMMER),
         fall = new EnumTest(Season.FALL),
         winter = new EnumTest(Season.WINTER);

         spring.displaySeason();
         summer.displaySeason();
         fall.displaySeason();
         winter.displaySeason();

     }

 }