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Java Java Objects Delivering the MVP Forum

How am I supposed to pass first name and last name in ForumPost in Main.java ?

Help with the ForumPost initialization ...??

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;
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",

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;


  // TODO: add getters for firstName and lastName
  public String getFirstName(){

    return firstName;

   public String getLastName(){
  return lastName;

public class ForumPost {
  private User author;
  private String title;
  private String description;

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

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

  public User getAuthor() {
    return author;

  public String getTitle() {
    return title;

  public String getDescription() {
    return description;
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");

    Forum forum = new Forum("Java");
    // TODO: pass in the first name and last name that are in the args parameter
    User author = new User("first name", "last name");
    // TODO: initialize the forum post with the user created above and a title and description of your choice
    ForumPost post = new ForumPost("first name" "last name","inferno","thriller");



Ryan Schron
Ryan Schron
1,084 Points

Hi Atul,

It looks to me like your ForumPost constructor is expecting a User object, not a first name and last name. There's an important distinction to be made here in that the User object is a sort of wrapper around the data it contains (first name, last name). Its like packaging items to send in the mail... on my end I am expecting your whole package, not the individual contents. Try doing this instead:

ForumPost post = new ForumPost(author,"inferno","thriller");

Remember, you already made a User object called author. The ForumPost wants that object, not its information.

I hope that helps with your problem.