class Solution {
public String reverseWords(String s) {
String[] words = s.split(" ");
StringBuffer sb = new StringBuffer();
for(String word : words) {
char[] chs = word.toCharArray();
for(int i=chs.length-1; i>=0; i--)
sb.append(chs[i]);
sb.append(" ");
}
sb.deleteCharAt(sb.lastIndexOf(" "));
return sb.toString();
}
}