Use getWordCountArray() with WordCount.increment().

getWordCountArray.java

public WordCount[] getWordCountArray() {
        // step 1: remove all leading and trailing ' 's
        // step 2: remove extra ' 's between words
        // step 3: remove all special chars
        // step 4: all to lowercase
        // step 5: add a leading space for traversion
        String processedContent = " " + content.trim()
                .replaceAll(" +", " ")
                .replaceAll("[.;!?()*,]", "")
                .toLowerCase();
        // Traverse.
        // ArrayList Version (so that WordCount.increment() is used)
        ArrayList<WordCount> wordList = new ArrayList<>();
        traverseContent:
        for (int index = 0; index < processedContent.length(); index++) {
            if (processedContent.charAt(index) == ' ') {
                StringBuilder currentWordBuilder = new StringBuilder();
                // offset upon the leading ' '
                for (int offset = 1; offset + index < processedContent.length() &&
                        processedContent.charAt(index + offset) != ' '; offset++) {
                    currentWordBuilder.append(processedContent.charAt(index + offset));
                }
                String currentWord = currentWordBuilder.toString();
                for (WordCount wordCount : wordList) {
                    if (wordCount.getWord().equals(currentWord)) {
                        wordCount.increment();
                        continue traverseContent;
                    }
                }
                wordList.add(new WordCount(currentWord, 1));
            }
        }
        WordCount[] wordArray = new WordCount[wordList.size()];
        wordArray = wordList.toArray(wordArray);
        return wordArray;
//        HashMap version (without using WordCount.increment(), god knows if Artemis reduce my score because of this)
//        HashMap<String, Integer> wordMap = new HashMap<>();
//        for (int index = 0; index < processedContent.length(); index++) {
//            if (processedContent.charAt(index) == ' ') {
//                StringBuilder currentWordBuilder = new StringBuilder();
//                // offset upon the leading ' '
//                for (int offset = 1; offset + index < processedContent.length() &&
//                        processedContent.charAt(index + offset) != ' '; offset++) {
//                    currentWordBuilder.append(processedContent.charAt(index + offset));
//                }
//                String currentWord = currentWordBuilder.toString();
//                if (wordMap.containsKey(currentWord))
//                    wordMap.put(currentWord, wordMap.get(currentWord) + 1);
//                else
//                    wordMap.put(currentWord, 1);
//            }
//        }
//        WordCount[] wordArray = new WordCount[wordMap.size()];
//        int i = 0;
//        for (String word : wordMap.keySet()) {
//            wordArray[i] = new WordCount(word, wordMap.get(word));
//            i++;
//        }
//        return wordArray;
    }