151.reverse-words-in-a-string.java

// 151. Reverse Words in a String

class Solution {
    public String reverseWords(String s) {
        String[] words = s.split(" ");
        StringBuilder sb = new StringBuilder();

        for (int i = words.length - 1; i >= 0; i--) {
            if (!words[i].equals("")) {
                sb.append(words[i]);
                sb.append(" ");
            }
        }

        return sb.toString().trim();
    }
}