问两个整数乘积的长存贮结果

EN

public class Solution {
public static void main(String[] args) {
// System.out.println(solution(32329,4746475));
    System.out.println(solution(3,4));
}

 public static int solution(int A, int B) {
        // write your code in Java SE 8
        long mul=A*B;
        int ans=0;
        while(mul>0)
        {
            if((mul%2)!=0)
            {
                ans++;
            }
            mul=mul/2;
        }
        return ans;
    }
}

long mul=(long)A*(long)B;