https://leetcode.com/problems/reverse-words-in-a-string/
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18// class Solution {
// public String reverseWords(String s) {
// String[] sarr=s.trim().split(" ");
// int len=sarr.length;
// String res="";
// for(int i=len-1;i>=0;i--){
// if(sarr[i].length()!=0) res+=sarr[i]+" ";
// }
// return res.trim();
// }
// }
class Solution {
public String reverseWords(String s) {
List<String> wordList=Arrays.asList(s.trim().split("\\s+"));
Collections.reverse(wordList);
return String.join(" ",wordList);
}
}