Reverse Words in a String

Question (LC.151)

Analysis

StringBuffer example. Where you have to append a lot of times.

Code

/**
 * Store each work in map then reverse the whole map
 */
public String reverseWords(String s) {
    String[] words = s.trim().split("[ ]+");

    StringBuilder result = new StringBuilder();
    if (words.length > 0) {
        for (int i = words.length - 1; i > 0; i--) {
            result.append(words[i]);
            result.append(" ");
        }
        result.append(words[0]);
    }

    return result.toString();
}