public class Solution {
/*
* @param s: A string
* @return: A string
*/
public static String reverseWords(String s) {
if(s==null || s.length() == 0) return "";
String[] array = s.split(" ");
StringBuilder sb = new StringBuilder();
for (int i = array.length - 1; i>=0; --i) {
if(!array[i].equals("")){
sb.append(array[i]).append(" ");
}
}
return sb.toString();
}
}