Reverse Words - GCJ 2010 (Africa)

ReverseWords.java

import java.util.*;
import java.io.*;

public class ReverseWords {
  public String reverseWords(String phrase) {
    List<string> wordList = Arrays.asList(phrase.split("[ ]"));
    Collections.reverse(wordList);

    StringBuilder sbReverseString = new StringBuilder();
    for(String word: wordList) {
      sbReverseString.append(word + " ");
    }

    return sbReverseString.substring(0, sbReverseString.length() - 1);
  }
}