求二进制中1的个数

public class 二进制1的个数 {
    public static void main(String[] args) {
        int x=numof2(10);
        System.out.println(x);
    }
    public static int numof2(int n){
         int count = 0;
         while(n!= 0){
         count++;
         n = n & (n - 1);
         }
        return count;
    }
}