LeetCode 9 - Palindrome Number

Determine whether an integer is a palindrome. Do this without extra space.

public boolean isPalindrome(int x) {
    int y = 0;
    while(x >= y) {
        y = y * 10 + x % 10;
        if(x == y || x/10 == y) {
            return true;
        }
        if(y == 0) {
            return false;
        }
        x /= 10;
    }
    return false;
}