Palindrome Number

public class Solution {
    public boolean isPalindrome(int x) {
        if (x < 0) {
            return false;
        }
        return x == reverse(x);
    }
    
    public int reverse(int x) {
        int res = 0;
        while (x != 0) {
            res = res*10 + x%10;
            x = x/10;
        }
        return res;
    }
}