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Java Java Objects (Retired) Delivering the MVP Wrapping up

Daniel Schwemmlein
Daniel Schwemmlein
4,960 Points

Getting there in the java challenge. Now at task 3/4

in task 3 they are asking: about a "ForumPost. It's going to need a constructor that takes a User author a String title and a String description. Don't forget to initialize the member fields in the constructor. Also please add the getter for mDescription." -ok. where would we start first here? Thanks for some advice

ForumPost.java
public class ForumPost {
  private User mAuthor;
  private String mTitle;
  private String mDescription;

  public User getAuthor() {
    return mAuthor;
  }



  public String getTitle() {
    return mTitle;
  }

  // TODO: We need to expose the description
}
User.java
public class User {

   private String mFirstName;  //we make it a String type : TYPE and mSomeName was a hint
   private String mLastName;

  public User(String firstName, String lastName) {
    mFirstName = firstName;  
    mLastName = lastName; 
  }

 public String getFirstName() {
           return mFirstName;
       }

 public String getLastName() {
           return mLastName;
       } 
}
Forum.java
public class Forum {
  private String mTopic;

  public String getTopic() {
      return mTopic;
  }

  public Forum(String topic) {
    mTopic = topic;
  }

  public void addPost(ForumPost post) {
      /* When all is ready uncomment this...
      System.out.printf("New post from %s %s about %s.\n",
                         post.getAuthor().getFirstName(),
                         post.getAuthor().getLastName(),
                         post.getTitle());
      */
  }
}
Example.java
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

I think you need to review the video about Constructors again.

Look at the User constructor:

public User(String firstName, String lastName) { mFirstName = firstName;
mLastName = lastName; }

That should give you some idea of how to do the ForumPost constructor.

public ForumPost(User user, ......etc {