Java Enumeration (枚举类型) (2) -- switch语句语法有一点点特别

http://www.blogjava.net/JafeLee/archive/2007/09/08/143609.html

Java Enumeration (枚举类型) (2) -- switch语句

当枚举类型用在switch语句中时，语法有一点点特别。看例子：

<!---->package  other;
import  basic.Day;
public   class  SwitchTest
{
     public   static   void  main(String [] args)
    {
         int  FRIDAY  =   5 ;
        System.out.println(FRIDAY);
        
        Day today  =  Day.SATURDAY;
         switch (today)
        {
         case  FRIDAY:
            System.out.println( " Today is  "   +  today.toString().toLowerCase());
             break ;
         case  SATURDAY:
            System.out.println( " Today is  "   +  today.toString().toLowerCase());
             break ;
         case  SUNDAY:
            System.out.println( " Today is  "   +  today.toString().toLowerCase());
             break ;
         case  MONDAY:
            System.out.println( " Today is  "   +  today.toString().toLowerCase());
             break ;
         case  TUESDAT:
            System.out.println( " Today is  "   +  today.toString().toLowerCase());
             break ;
         case  WEDNESDAY:
            System.out.println( " Today is  "   +  today.toString().toLowerCase());
             break ;
         case  THURSDAY:
            System.out.println( " Today is  "   +  today.toString().toLowerCase());
             break ;
         default :
            System.out.println( " otherday " );
        }
    }
}

注意在case标签中，Day不出现，即case Day.FRIDAY是不合法的。而在其他地方出现时则必须用Day.FRIDAY