Java输出质数

public class Main {

	public static void main(String[] args) {
		int n = 2;

		int i, flag = 0;

		while (n <= 1000) {

			i = 2;

			for (i = 2; i <n; i++) {

				if (n % i == 0) {

					break;

				}

			}

			if (n == i) {

				flag++;

				System.out.printf(n + ",");

				if (flag%10==0)

					System.out.println();

			}

			n++;			

		}
	}

}

 输出结果

2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,
127,131,137,139,149,151,157,163,167,173,
179,181,191,193,197,199,211,223,227,229,
233,239,241,251,257,263,269,271,277,281,
283,293,307,311,313,317,331,337,347,349,
353,359,367,373,379,383,389,397,401,409,
419,421,431,433,439,443,449,457,461,463,
467,479,487,491,499,503,509,521,523,541,
547,557,563,569,571,577,587,593,599,601,
607,613,617,619,631,641,643,647,653,659,
661,673,677,683,691,701,709,719,727,733,
739,743,751,757,761,769,773,787,797,809,
811,821,823,827,829,839,853,857,859,863,
877,881,883,887,907,911,919,929,937,941,
947,953,967,971,977,983,991,997,