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Java Java Objects Delivering the MVP Forum

ForumPost.java

I'm having a lot of trouble on the 3rd task that deals with ForumPost.java. I can't for the life of me figure out how to complete it and I've tried so many different things. I think I should be using args but I'm not sure. Any 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;
  }

private Forum(String topic){
  this.topic = topic;
}
  /* Uncomment this when you are prompted to do so
  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 {
  // TODO: add private fields for firstName and lastName
  private String firstName;
  private String lastName;

  public User(String firstName, String lastName) {
    // TODO: set and add the private fields
  this.firstName = firstName;
  this.lastName = lastName;
  }

  public String getFirstName(){
    return firstName;
  }
  public String getLastName(){
    return lastName;
  }
  // TODO: add getters for firstName and lastName

}
ForumPost.java
public class ForumPost {
  public static void main (String[] args){}
  private User author;
  private String title;
  private String description;

  // TODO: add a constructor that accepts the author, title and description

  public User getAuthor() {
    return author;
  }

  public String getTitle() {
    return title;
  }

  public String getDescription() {
    return description;
  }

  public ForumPost(String title, User author, String description){
    title = title(args[0]);
   author = author(args[0], args[1]);
   description = description(args[0]);
  }

}
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);
    }
    /* Uncomment this when prompted
    Forum forum = new Forum("Java");
    // TODO: pass in the first name and last name that are in the args parameter
    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);

// */
  }

}

2 Answers

public ForumPost(User author, String title, String description) { 
    this.author = author;
    this.title = title;
    this.description = description;
  }
Konstantinos Pedarakis
Konstantinos Pedarakis
21,301 Points

hi Mary Morin ,

in this // TODO: pass in the first name and last name that are in the args parameter you should pass the first and second argument of the args. due that args is a String array you can do this.

 // TODO: pass in the first name and last name that are in the args parameter
  User author = new User(args[0], args[1]);
    // TODO: initialize the forum post with the user created above and a title and description of your choice
    ForumPost post = new ForumPost("title", author, "description");
    forum.addPost(post);

and in the ForumPost.java you just set the constructor like this.

 public ForumPost(User author, String title, String description){
    this.author = author;
    this.title = title;
    this.description = description;
  }

Hope that helps.