Leetcode-557. Reverse Words in a String III

前言：为了后续的实习面试，开始疯狂刷题，非常欢迎志同道合的朋友一起交流。因为时间比较紧张，目前的规划是先过一遍，写出能想到的最优算法，第二遍再考虑最优或者较优的方法。如有错误欢迎指正。博主首发CSDN，mcf171专栏。

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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"

这个题目还是蛮简单的，可以先split，然后再reverse。

public class Solution {
    public String reverseWords(String s) {
        if(s.length() == 0) return s;
        String[] words = s.split(" ");
        StringBuffer sb = new StringBuffer("");
        for(String word : words){
            for(int i = word.length() - 1 ;i >= 0; i --) sb.append(word.charAt(i));
            sb.append(" ");
        }
        
        sb.setLength(sb.length() - 1);
        return sb.toString();
    }
}