Question

I retrieve the data from database and loop it thru an array to display the like amount.

        public void SetUpLikeAmount() {
    int likes = 0;
    ArrayList <Integer> likeArray = new ArrayList <Integer>();
    for (int count = 0; count < likeArray.size();count++){
    // Set Up Database Source
    db.setUp("IT Innovation Project");
    String sql = "Select likeDislike_likes from forumLikeDislike WHERE topic_id = "
            + topicId + "";
    ResultSet resultSet = null;
    // Call readRequest to get the result
    resultSet = db.readRequest(sql);
    try {
        while (resultSet.next()) {
            likeArray.add(Integer.parseInt(resultSet.getString("likeDislike_likes")));
            likes += likeArray.get(count);
        }
        resultSet.close();
    } catch (Exception e) {
        System.out.println(e);
    }

    }
    jLabel_like.setText(Integer.toString(likes));
}

However, it keeps returning 0. Thanks in advance.

Answer 1

May be here is the new code you should refer:

public void SetUpLikeAmount() {
     int likes = 0;
    // Set Up Database Source
    db.setUp("IT Innovation Project");
    String sql = "Select likeDislike_likes from forumLikeDislike WHERE topic_id = "
            + topicId + "";
    ResultSet resultSet = null;
    // Call readRequest to get the result
    resultSet = db.readRequest(sql);
    try {
        while (resultSet.next()) {
            likes += Integer.parseInt(resultSet.getString("likeDislike_likes"));
        }
        resultSet.close();
    } catch (Exception e) {
        System.out.println(e);
    }

    jLabel_like.setText(Integer.toString(likes));
}

You might not need the arraylist I believe as you are getting the value and summing it during the iteration over the result set only.