Java作业 大于某个数的最小质数

import java.util.Scanner;

public class zhishu {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input = new Scanner(System.in);
		System.out.print("请输入数字n:");
		int n = input.nextInt();
		System.out.println("大于"+n+"的最小质数:"+zhishu(n));
	}
	public static int zhishu(int n) {
		int resualt = 0;
		for(int a = n+1;;a++) {
			int q = 0;
			for(int b = n;b >= 2;b--) {
				if(a%b==0) {
					q = 1;
					break;
				}
			}
			if(q == 0) {
				resualt = a;
				break;
			}
		}
		return resualt;
	}
}