用Java语句判断一个数字是不是7的倍数

import java.util.Scanner;

public class Tomp {
    public static void main(String[] args) {
        Scanner mys = new Scanner(System.in);
        System.out.println("输入整数");
        int a = mys.nextInt();
        switch (a%7) {
            case 0:
                System.out.println("7的倍数");
                break;
            default:
                break;
        }
    }
}