public static boolean isPalindrome(int num) {

    if (num < 0) return false;

    String stringNum = String.valueOf(num);

    for (int i = 0; i < stringNum.length() / 2 + 1; i++) {
        if (stringNum.charAt(i) != stringNum.charAt(stringNum.length() - i - 1)) return false;
    }

    return true;

}