LeetCode(34)-Palindrome Number

題目：

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

思路：

代碼：

public class Solution {
    public boolean isPalindrome(int x) {
        if(x < 0){
            return false;
        }
        if(x == 0){
            return true;
        }
        if(x > 0){
            int finish = x;
            //用來存放倒敘相乘的結果
            int y = 0;
            while(x != 0){
                y = y*10 + x%10;
                x = x/10;
            }
            return finish == y ? true:false;
        }
        return true;
    }
}