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Java Java Objects Delivering the MVP Forum

samuel steel
samuel steel
8,831 Points

I need help with this Bummer! Are you sure you used the arguments passed in from the main method in Main.java? args

Bummer! Are you sure you used the arguments passed in from the main method in Main.java? args[0] is the firstName and args[1] should be the last name

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());

  }
}
User.java
public class User {
  private String firstName;
  private String lastName;

  public User(String firstName, String lastName) {
    this.firstName = firstName; // <--- your code will be different here
    this.lastName = lastName; //<---- and here
  }

  public String getFirstName(){
    return firstName;
  }

  public String getLastName(){
    return lastName;
  }

}
ForumPost.java
public class ForumPost {
  private User author;
  private String title;
  private String description;

  public ForumPost(User author, String title, String description){
    this.author = author; //<--- your code will be different here
    this.title = title; // <---- and here
    this.description = description; //<---- aaand here 

  }

  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
    String firstName = args[0];
    String lastName = args[1];
    User author = new User(args[0], args[1]); //<----- all cruicial points marked with comments
    // TODO: initialize the forum post with the user created above and a title and description of your choice

    ForumPost post = new ForumPost(author, "Programming is awesome", "Cuz it makes us create new stuff");
    forum.addPost(post);
  }
}

1 Answer

andren
andren
28,558 Points

The code that verifies challenges tend to be quite picky, therefore as a general rule you should never modify anything the challenge does not ask you to modify.

In the Forum.java file you have changed the name of the topic field variable to mTopic and changed the message that is printed when the addPost method is called. Those changes are enough to mess up the challenge checker.

If you change the name back and restore the original addPost message like this:

public class Forum {
  private String topic;

  public String getTopic() {
    return topic;
  }

  public Forum(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()
    );
  }
}

Then your code will be accepted.

samuel steel
samuel steel
8,831 Points

Thank you I was not paying attention