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Java Java Objects Delivering the MVP Forum

What's going on, I could not find mistakes

it's constructor's problem or I return wrong? Thank you, my friend.

public class Forum {
  private String topic;
  //Forum forum = new Forum("Java");
  // TODO: add a constructor that accepts a topic and sets the private field topic
  public Forum (String topic){
   this.topic = topic;
  public String getTopic() {
    return 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",

public class User {
  // TODO: add private fields for firstName and lastName
  private String firstName;
  private String lastName;
  public User(String firstName, String lastName) {
    firstName = "Ricky";// TODO: set and add the private fields
    lastName = "Lee";

  // TODO: add getters for firstName and lastName
  public void getFirstName(){
   return firstName.User();
public class ForumPost {
  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 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");
    /* 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();

// */


1 Answer

Luis Rodriguez
Luis Rodriguez
7,275 Points

First of all you need to change your User Constructor to use the arguments given in the parameters.
you need to use the 'this.' keyword to let the compiler differentiate between the firstNames.
So you need to change firstName = "Ricky"; to this.firstName = firstName; same goes for the lastName.
Next you will need to change this
// TODO: add getters for firstName and lastName
public void getFirstName(){
return firstName.User();
public String getFirstName() {
return firstName;
same goes for the last name.
'public void' does not allow you to return anything. Hope this helps my friend.