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

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本文介绍Java中枚举类型的使用，特别是如何在switch语句中应用枚举。通过示例代码展示了正确的case标签使用方式，即枚举成员直接作为case的值。

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