编写 switch 语句，如果 day是 0、1、2、3、

package ab;
import java.util.Scanner;
public class As {
    public static void main(String[] args) {
        int a;
        System.out.print("请输入day");
        Scanner in=new Scanner(System.in);
        a=in.nextInt();
        switch(a){
        case 0:
            System.out.print("Sunday");
            break;
        case 1:
            System.out.print("Monday");
            break;
        case 2:
            System.out.print("Tuesday");
            break;
        case 3:
            System.out.print("Wednesday");
            break;
        case 4:
            System.out.print("Thursday");
            break;
        case 5:
            System.out.print("Friday");
            break;
        case 6:
            System.out.print("Saturday");
            break;    
        }
    }

}