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Java Java Objects (Retired) Delivering the MVP Wrapping up

Mark Miller
Mark Miller
45,831 Points

Challenge 4 of 4, author is of type User, so it should work alright. It never works.

I am not having trouble understanding, so I don't know why it does not pass the check work.

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

  public ForumPost(User author, String title, String description) {
    mAuthor = author;
    mTitle = title;
    mDescription = description;
  }

  public String getDescription() {
    return 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;
  private String mLastName;

  public User(String firstName, String lastName) {
    // TODO:  Set the private fields here
    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("Mark", "Miller");
     Add the author, title and description
     ForumPost post = new ForumPost(author, "Completion", "Discussion");
     forum.addPost(post);
  }
}

2 Answers

Rob Bridges
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Rob Bridges
Full Stack JavaScript Techdegree Graduate 35,467 Points

Hey Mark, for the new author instead of hard-coding in your name, pass in any arguments given to the initial compile statement, so it should look something like.

User author = new User(args[0], args[1])

Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Hi Mark,

this challenge is cool !

You need the arguments for the User class. This are special arguments and they are created when the programm starts and the compiler kicks the beat off :)

The syntax is unusual

User author = new User(args[0], args[1]);

"args" are inside the mystical

public static void main(String[] args);

method ...

Tell me if my suggestion has done the trick ...

I hope my english i well enough :)

Grigorij