#151 Reverse Words in a String.java

//https://leetcode.com/problems/reverse-words-in-a-string/
class Solution {
    public String reverseWords(String s) {
        s = s.trim();
        String[] strs = s.split("\\s+");
        StringBuilder res = new StringBuilder();
        for(int i  = strs.length - 1 ; i >= 0 ; i--) {
            res.append(strs[i]).append(" ");
        }
        return res.toString().trim();
    }
}