判断数字回文
class Solution { public static boolean isPalindrome(int x) { if (x < 0) { return false; } List<Integer> list = new ArrayList<>(); int num = x; while (x > 0) { int temp = x % 10; list.add(temp); x /= 10; } int result = 0; for (int i = 0; i < list.size(); i++) { result = (result * 10 + list.get(i)); } if (result == num) { return true; } else { return false; } } }