Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000.
Example:
Input: "babad" Output: "bab" Note: "aba" is also a valid answer.
Example:
Input: "cbbd" Output: "bb"
题目含义：查找最长的回文子串
1 class Solution { 2 private int low, maxLen; 3 4 private void huiwen(String s, int i, int j) { 5 while (i >= 0 && j < s.length() && s.charAt(i) == s.charAt(j)) { 6 i--; 7 j++; 8 } 9 if (maxLen < j - i - 1) { 10 low = i + 1; 11 maxLen = j - i - 1; 12 } 13 } 14 public String longestPalindrome(String s) { 15 if (s.length() < 2) return s; 16 for (int i = 0; i < s.length()-1; i++) { 17 huiwen(s, i, i); 18 huiwen(s, i, i + 1); 19 } 20 return s.substring(low, low+maxLen); 21 } 22 }
5. Longest Palindromic Substring
原文：http://www.cnblogs.com/wzj4858/p/7682510.html