求循环素数

这里只是以求三位循环素数为例子。

public class CirclePrimeNumber{public static boolean isPrime(int n){for (int i = 2; i <= Math.sqrt(n); i++){if (n % i == 0){return false;}}return true;}public static int circle(int n){int a = n % 10;int b = n / 10;return a * 100 + b;}public static void main(String[] args){int count = 0;int temp = 0;for (int i = 999; i >= 100; i--){count = 0;temp = i;for (int j = 1; j <= 3; j++){if (isPrime(temp)){count++;temp = circle(i);}else {break;}}if (count == 3){System.out.println(i);}}}}

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