Character Counts

public HashMap<Character, Integer> getCharacterCounts() {
  HashMap<Character, Integer> tweetCharacters();
  //iterate through tweets
    //for each character in string
      if (tweetCharacters.containsKey(/*CHARACTER*/)) {
        tweetCharacters.put(/*CHARACTER*/, tweetCharacters.get(/*CHARACTER*/) + 1);
      } else {
        tweetCharacters.put(/*CHARACTER*/, 1);
      }
    //end for
  //end iteration
}