LeetCode 9. Palindrome Number

class Solution {

public boolean isPalindrome(int x) {

if(x < 0 || (x % 10 == 0 && x != 0)) {

return false;

}

int num = 0;

while(x > num) {

num = num * 10 + x % 10;

x /= 10;

}

return x == num || x == num/10;

}

}