输入一个字符串，输出该字符串中最大对称子串的长度

/**
 * 在这里加入功能说明
 *输入一个字符串，输出该字符串中最大对称子串的长度。例如输入字符串：“google”，该字符串中最长的子字符串是“goog”，长度为4，因而输出为4。
 * @author wangxiaowei
 * @version $Revision: 1.4 $, 2012-10-11$
 */
public class Alo13
{


/**
* 
*/
public static void main(String[] args)
{
// TODO Auto-generated method stub
String s = new String("aaaaaaaaaaaaaaa");
System.out.println("最大的对称字串是:"+finaMaxSubString(s));


}

public static int finaMaxSubString(String s)
{
int maxLength = 1;
int length = s.length();
int start = 0;
//    while(start<length)
//    {
//     int before = start-1;
// int behide = start+1;
// int currentLengh = 1;
// if(start!=0)
// {
//
// while(before>-1&&behide<length&&s.charAt(before)==s.charAt(behide))
// {
// before--;
// behide++;
// }
// before++;
// behide--;
// }
//
// currentLengh = behide-before+1;
// maxLength = maxLength>currentLengh?maxLength:currentLengh;
//
//    before = start;
// behide = start+1;
// while(before>-1&&behide<length&&s.charAt(before)==s.charAt(behide))
// {
// before--;
// behide++;
// }
// before++;
// behide--;
// currentLengh = behide-before+1;
// maxLength = maxLength>currentLengh?maxLength:currentLengh;
// start++;
//    }
//
while(start<length)
   {
    int before = start-1;
int behide = start+1;
int currentLengh = 1;


while(before>-1&&behide<length&&s.charAt(before)==s.charAt(behide))
{
before--;
behide++;
}

currentLengh = behide-before+1-2;
maxLength = maxLength>currentLengh?maxLength:currentLengh;

   before = start;
behide = start+1;
while(before>-1&&behide<length&&s.charAt(before)==s.charAt(behide))
{
before--;
behide++;
}

currentLengh = behide-before+1-2;
maxLength = maxLength>currentLengh?maxLength:currentLengh;
start++;
   }

return maxLength;
}




}