Day42_LeetCode151.java

class Solution {
    public String reverseWords(String s) {
      String[] arr = s.split("\\s+"); // split on the basis of spaces
      StringBuilder sb = new StringBuilder("");

      for(int i=arr.length-1;i>=0;i--){
          sb.append(arr[i] + " ");
      }

      // trim function --> remove trailing and leading spaces

      String ans = sb.toString();
      ans = ans.trim();
      return ans ;
    }
}