Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Java Java Objects Delivering the MVP Forum

isaac schwartzman
isaac schwartzman
963 Points

I'm getting a compiler error and idk why because task one already passed I'm on task 4 of 4

if I change the return type of Topic to void it tells me I can't put new in front of Forum("java)

Forum.java
public class Forum {
  private String topic;

  // TODO: add a constructor that accepts a topic and sets the private field topic

  public String getTopic() {
    return topic;
  }
 public Topic (String topic) {
 this.topic = topic;
 }

    public void addPost(ForumPost post) {
    System.out.printf("A new post in %s topic from %s %s about %s is available",
            topic,
            post.getAuthor().getFirstName(),
            post.getAuthor().getLastName(),
            post.getTitle()
    );
  }


}
User.java
public class User {
  // TODO: add private fields for firstName and lastName
private String firstName;
  private String lastName;
  public User(String firstName, String lastName) {
    // TODO: set and add the private fields
this.firstName = firstName;
    this.lastName = lastName;
  }

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

  public String getLastName (){
  return lastName;
  }
}
ForumPost.java
public class ForumPost {
  private User author;
  private String title;
  private String description;

  // TODO: add a constructor that accepts the author, title and description
public ForumPost (User author, String title, String description) {
this.author = author;
  this.title = title;
  this.description = description;
}
  public User getAuthor() {
    return author;
  }

  public String getTitle() {
    return title;
  }

  public String getDescription() {
    return description;
  }
}
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);
    }

    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, "title","desription");
    forum.addPost(post);


  }

}

1 Answer

Dave Jindal
Dave Jindal
4,000 Points

Hey Isaac,

check out the naming of the constructor for the Forum class! It should be named exactly like the class, so in this case "Forum".

Cheers, Dave