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Java Java Objects (Retired) Delivering the MVP Wrapping up

Java

Can someone help me with this challenge? Its the last task.

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

  public User getAuthor() {
    return mAuthor;
  }

  public String getTitle() {
    return mTitle;
  }

  public String getDescription() {
  return mDescription;
  }

  // TODO: We need to expose the description
  public ForumPost(User author, String title, String description) {

    title = "Java";
    description = "It feels good";
       mAuthor = author;
    mTitle = title;
    mDescription = description;
  }
}
User.java
public class User {

   private String mFirstName;
    private String mLastName;
  private String lastName;
  private String firstName;

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

  public String getFirstName() {
  return firstName;
  }

  public String getLastName() {
  return lastName;
  }

}
Forum.java
public class Forum {
  private String mTopic;

  public String getTopic() {
      return mTopic;
  }

  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());

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

  }
}
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

Miguel Canas
seal-mask
.a{fill-rule:evenodd;}techdegree
Miguel Canas
Python Development Techdegree Student 11,470 Points

Hey Christian,

  1. In Example.java, the comment "Take the first two elements passed args" is referring to the string of arguments in the main method. So what it's asking to take args[0], and args[1] and pass them to the new User() constructor. The assumption is that these are the necessary first name and last name arguments that the User() constructor needs.

  2. In the same file, take a look at the new FormPost() constructor call. It looks like it's missing a few necessary arguments as well. Based on the ForumPost constructor signature in ForumPost.java, what do you need to pass to this constructor in order to make it instantiate correctly? You may need to adjust the body of your FormPost constructor to initialize these fields correctly.

Hope that helps!

~ Miguel

Thanks! :)