switch选择语句

public class Demo {

    public static void main(String[] args) {

 　　　　int day = 5;

　　  switch(day){

            case 1:

                System.out.println("星期一");

                break;

            case 2:

                System.out.println("星期二");

                break;

            case 3:

                System.out.println("星期三");

                break;

            case 4:

                System.out.println("星期四");

                break;

            case 5:

                System.out.println("星期五");

                break;

            case 6:

                System.out.println("星期六");

                break;

            case 7:

                System.out.println("星期天");

                break;

            default:

                System.out.println("这个是什么鬼？");

        }   

    }

}