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 Delivering the MVP Forum

I don't understand what I have to do in step 4 in the Main class... Can you please help me?

So I did well until now but I don't know what to do in Main.java int TODO section... I need a little help.

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 Forum (String topic){
    topic = getTopic;
  }
  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 {
  private String firstName;
  private String lastName;

  public User(String firstName, String lastName) {
    this.firstName = firstName;
    this.lastName = lastName;

  }

  public String getFirstName (){
   return this.firstName;
  }

  public String getLastName(){
    return this.lastName;
  }

}
ForumPost.java
public class ForumPost {
  private User author;
  private String title;
  private String description;
  private String description;
  private String author;
  private String title;
  // 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.descpription = 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");
    User.getFitstName;
    User.getLastName;
    User author = new User();


    // TODO: initialize the forum post with the user created above and a title and description of your choice
    ForumPost post = new ForumPost();
    forum.addPost(post);

// */
  }

}

1 Answer

Hi there,

The firstName and lastName for the User constructor are held in the args which are passed into the main method when the code is run. The args is an array of strings and the first two elements of this array contain the names you need. Pass the first two elements, one at a time, into the User constructor:

    // TODO: pass in the first name and last name that are in the args parameter
    User author = new User(args[0], args[1]);

Make sense?

Steve.

Oh I'm so stupid... of course man... Thanks a lot....

That's a tricky one! Don't be hard on yourself. :+1: