算法工具类

 

 

/**
 * @title:AlgorithmUtil
 * @description:
 * @author: dingpeng
 * @date: 2020/8/11
 *
 * @since: Jdk8
 */
public class AlgorithmUtil {

    //判断是否是质数
    public static boolean isPrim(int num){

        for(int i=2;i<=Math.sqrt((double)num);i++){
            if(num%i==0){
                return false;
            }
        }
        return true;
    }

    //输出一个数的因子
    public static void yinZi(int num){
        int i = num;
        int j=2;
        while (j <= i) {
            if(i%j==0) {
                System.out.println(j);
                i = i/j;
            }
            else {
                j++;
            }
        }
    }



}