Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.
Example 1:
Input: "Let‘s take LeetCode contest" Output: "s‘teL ekat edoCteeL tsetnoc"
Note: In the string, each word is separated by single space and there will not be any extra space in the string.
public class Solution { public String reverseWords(String s) { if (s == null) return null; if (s.length() == 0) return ""; StringBuilder ret = new StringBuilder(); String[] ss = s.split(" "); int cnt = 0; for (String st : ss) { if (cnt ++ > 0) ret.append(" "); char[] chs = st.toCharArray(); for (int i=chs.length-1; i>=0; i--) { char ch = chs[i]; ret.append(ch); } } return ret.toString(); } }
LeetCode - 557. Reverse Words in a String III
原文：http://www.cnblogs.com/wxisme/p/7162033.html