【Leetcode】Reverse Words in a String JAVA

Reverse Words in a String

Given an input string, reverse the string word by word.

For example,

Given s = "

the sky is blue

",

return "

blue is sky the

".
其实这道题目不难啦，大家只要注意如何处理“”（空字符串）和多个空格就好了，下面我给出一个比较简单方便的算法~

public class Solution {
public String reverseWords(String s) {
if(s==null||s.length()==0)    return "";
String[] str=s.split(" ");
StringBuffer sb = new StringBuffer();
for(int i=str.length-1;i>=0;i--){
if(!str[i].equals("")){
sb.append(str[i]).append(" ");
}
}
return sb.length()==0 ? "" : sb.substring(0,sb.length()-1);
}
}