Palindrome Number

Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward.

Example 1:

Input: 121
Output: true

Example 2:

Input: -121
Output: false
Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome.

Example 3:

Input: 10
Output: false
Explanation: Reads 01 from right to left. Therefore it is not a palindrome.

Follow up:

Coud you solve it without converting the integer to a string?

判断一个数字是不是回文

ac code:

import java.util.ArrayList;
import java.util.List;

class Solution {
    public boolean isPalindrome(int x) {
    	if(x<0) {
    		return false;
    	}
    	List<Integer> list=new ArrayList<Integer>() ;
    	while(x>0) {
    		list.add(x%10);
    		x/=10;
    	}
    	int length=list.size();
    	int[] ints=new int[length];
    	int k=0;
    	for (Integer integer : list) {
			ints[k++]=integer;
		}
    	for(int i=0;i<length;i++) {
    		if(ints[i]!=ints[length-1-i])
    			return false;
    	}
        return true;
    }
}