查找大于某个数的最小质数

/*
输出大于某个正整数n的最小的质数
 */
class 大于n的最小质数 {
    public static void main(String[] args) {
        java.util.Scanner s = new java.util.Scanner(System.in);
        System.out.print("请输入任意一个正整数；");
        int num = s.nextInt();
        int num1 = num + 1;
        while (true){
            if (shiFouZhiShu(num1)) {
                System.out.println("大于" + num + "的最小质数是：" + num1);
                return;
            }
            num1 ++;
        }
    }

    public static boolean shiFouZhiShu(int num) {
        for (int i = 2; i < num; i++) {
            if (num % i == 0) {
                return false;
            }
        }
        return true;
    }
}