enum 枚举的用法

package second.book.secondpage.enumall;

public enum Days {
    /**
     * 一周天数的
     */
    MON,
    TUE,
    WED,
    THE,
    FRI,
    AT,
    SUN
}

package second.book.secondpage.enumall;

public class DayThings {
    public void fun(Days day)
    {
        switch(day)
        {
            case MON:
                System.out.println("新的一周开始了");
                break;
            case TUE:
                System.out.println("周二，天气刚刚好");
                break;
            case WED:
                System.out.println("周三了，");
                break;
            case THE:
                System.out.println("周四，山包");
                break;
            case FRI:
                System.out.println("又准备放假了");
                break;
            default:
                System.out.println("周末好好休息");
        }
    }
    public static void main(String[] args) {
        DayThings day=new DayThings();
        day.fun(Days.MON);

    }
}