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Java Java Objects Delivering the MVP Forum

David Huck
David Huck
3,676 Points

Not 100% sure what I am missing. It says "Looks like task 2 no longer passes" but when I go back, task 2 passes.

I go back to task 2 and without changing anything it passes just fine. Same with task 3. Any help would be appreciated.

Forum.java
public class Forum {
  private String mTopic;

  // TODO: add a constructor that accepts a topic and sets the private field topic
  public Forum(String topic){
    mTopic = topic;
  }

  public String getTopic() {
    return mTopic;
  }


  // Uncomment this when you are prompted to do so
  public void addPost(ForumPost post) {
    System.out.printf("A new post in %s topic from %s %s about %s is available",
            mTopic,
            post.getAuthor().getFirstName(),
            post.getAuthor().getLastName(),
            post.getTitle()
    );
  }


}
User.java
public class User {
  // TODO: add private fields for firstName and lastName
  private String mFirstName;
  private String mLastName;

  public User(String firstName, String lastName) {
    // TODO: set and add the private fields
    mFirstName = firstName;
    mLastName = lastName;
  }

  // TODO: add getters for firstName and lastName
  public String getFirstName() {
    return mFirstName;
  }

  public String getLastName() {
    return mLastName;
  }
}
ForumPost.java
public class ForumPost {
  private User mAuthor;
  private String mTitle;
  private String mDescription;

  // TODO: add a constructor that accepts the author, title and description
  public ForumPost(User author, String title, String description) {
    mAuthor = author;
    mTitle = title;
    mDescription = description;
  }

  public User getAuthor() {
    return mAuthor;
  }

  public String getTitle() {
    return mTitle;
  }

  public String getDescription() {
    return mDescription;
  }
}
Main.java
public class Main {

  public static void main(String[] args) {
    System.out.println("Beginning forum example");
    if (args.length < 2) {
      System.out.println("Usage: java Main <first name> <last name>");
      System.err.println("<first name> and <last name> are required");
      System.exit(1);
    }
    // Uncomment this when prompted
    Forum forum = new Forum("Java");
    // TODO: pass in the first name and last name that are in the args parameter
    User author = new User(args[0], args[1]);
    // TODO: initialize the forum post with the user created above and a title and description of your choice
    ForumPost post = new ForumPost(author, "This is your forum post title", "This is your forum post description");
    forum.addPost(post);


  }

}

2 Answers

Dino Šporer
Dino Šporer
5,430 Points

1) public Forum (String topic) { this.topic = topic; }

2)private String firstName; private String lastName;

this.firstName = firstName; this.lastName = lastName;

public String getFirstName() { return firstName; }

public String getLastName() { return lastName; }

3) public ForumPost (User author, String title, String description ) { this.author = author; this.title = title; this.description = description; }

4) Forum forum = new Forum("Java"); User author = new User(args[0], args[1]); ForumPost post = new ForumPost(author, "new title", "no description"); forum.addPost(post);

Just check it out one more, I think the problem is you user mFirstName instead of firstName, but in the task , firstName is what they really want

David Huck
David Huck
3,676 Points

Thank you. Went back and looked at the variables. Changed them all to "this.var = var" and that seemed to do the trick.