Explanation: We can swap the first 'b' with the last 'a', or the last 'b' with the first 'a'. Then, the longest repeated character substring is "aaa", which its length is 3. Explanation: Swap 'b' with ...

// 利用helper method，以当前位置i（奇数palindrome）或i和i+1（偶数palindrome）为中心，向两边扩散寻找局部最长palindrome。 // 解法二 ...

Java’s String class encapsulates an array of bytes. A byte can be converted to a char, in which case, String becomes an array of characters used to compose words, sentences, or any other data you want ...