leetcode5 Longest Palindromic Substring

<span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 24px; line-height: 26px;">Longest Palindromic Substring</span>

<span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 24px; line-height: 26px;"><span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 30px;">Given a string </span><span style="box-sizing: border-box; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 30px;">S</span><span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 30px;">, find the longest palindromic substring in </span><span style="box-sizing: border-box; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 30px;">S</span><span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 30px;">. You may assume that the maximum length of </span><span style="box-sizing: border-box; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 30px;">S</span><span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 30px;"> is 1000, and there exists one unique longest palindromic substring.</span>
</span>

<span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 24px; line-height: 26px;"><span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 30px;"></span></span><pre name="code" class="java">public class Solution {

public String longestPalindrome(String s) {
int n = s.length();
int beginIndex = 0;
int maxLength = 1;
boolean[][] table = new boolean

;
for (int i = 0; i < n; i++) {
table[i][i] = true;
}
for (int i = 0; i < n - 1; i++) {
if (s.charAt(i) == s.charAt(i + 1)) {
table[i][i + 1] = true;
beginIndex = i;
maxLength = 2;
}
}
for (int len = 3; len <= n; len++) {
for (int i = 0; i <= n - len; i++) {
int j = i + len - 1;
if (s.charAt(i) == s.charAt(j) && table[i + 1][j - 1]) {
table[i][j] = true;
beginIndex = i;
maxLength = len;
}
}
}
return s.substring(beginIndex, beginIndex + maxLength);
}

public static void main(String[] args) {
System.out.println(new Solution().longestPalindrome("dabcbac"));

}

}