public class Solution {    public boolean isPalindrome(int x) {                if(x < 0)        return false;                if(x < 10)        return true;                int i = 1;        int tmpx = x;        while(tmpx/10 != 0)        {            i *= 10;            tmpx /= 10;        }                while(x != 0)        {            int left = x % 10;            int right = x / i;                        if(left != right)            return false;            else            {                x = (x%i)/10;//x%i 去头 （x%i）/10去尾                i /= 100;//少了两个数字，位数少2            }        }                return true;    }}