Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Java Objects (Retired) Delivering the MVP Wrapping up

fast challenge task1 delivering the mvp

We are currently in the process of building a Forum. There is some skeleton code here, but I need your help to finish it up. Let's do this! In the Forum class, add a constructor that takes a String for the topic and sets the private field mTopic. i need help


public class User {

  // The part below this is the constructor
  public User(String firstName, String lastName) {
    // TODO:  Set the private fields here
public class Forum {
  private String mTopic;

  public void setTopic(String topic) {
    mTopic = topic;

  public String getTopic() {
      return mTopic;

  public void addPost(ForumPost post) {
      /* When all is ready uncomment this...
      System.out.printf("New post from %s %s about %s.\n",
public class Example {

  public static void main(String[] args) {
    System.out.println("Starting forum example...");
    if (args.length < 2) {
       System.out.println("first and last name are required. eg:  java Example Craig Dennis");
    // Forum forum = new Forum("Java");
    // Take the first two elements passed args
    // User author = new User();
    // Add the author, title and description
    // ForumPost post = new ForumPost();
    // forum.addPost(post);

1 Answer

Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

At some point you will want to create a new Forum object (not right now) with a type that you will decide later.

Forum forum = new Forum("thisIsTheForumType");

In order to do this, you need to create a new constructor in your Forum.java file.

public Forum(String type) {
  mType = type;

Now when you want to create a new forum, as shown with the first line of code... the mType of the Forum will automatically be set.