Solution for Maps Challenge

public Map<String,Integer> getCategoryCounts () {
  Map<String,Integer> categoryCounts = new HashMap<String,Integer>();
    for (BlogPost post: mPosts) {
      String category = post.getCategory();
      Integer count = categoryCounts.get(category);
      if(count == null){
        count = 0;
      }
      count++;
      categoryCounts.put(category, count);
    }
     return categoryCounts;
}