public WordPairList(String[] words)

{

  allPairs = new ArrayList<WordPair>();

​

  for(int i = 0; i < words.length; i++)

    for(int j = i + 1; j < words.length; j++)

      allPairs.add(new WordPair(words[i], words[j]));

}

​

public int numMatches()

{

  int matches = 0;

​

  for(WordPair wp : allPairs)

    if(wp.getFirst().equals(wp.getSecond()))

      matches++;

​

  return matches;

}

​