public class Solution {public boolean isPalindrome(int x) {if( x < 0 ) return false;int i = 1 , j = 10 ;while( x / i >= 10 ) i *= 10 ;int flag = i;while( flag >1 ){if( x/i%j != x%j ) return false;x /= j;i /= 100;flag /= 100;}return true;}}
public class Solution {public boolean isPalindrome(int x) {if( x < 0 || x!=0 && x%10==0 ) return false;int build = 0;while( x > build ){build = build * 10 + x % 10;x /= 10;}return build == x || build/10 == x ;}}
原文：http://www.cnblogs.com/flyfatty/p/6648850.html