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Java Java Objects Delivering the MVP Forum

jose cherian
jose cherian
Courses Plus Student 1,007 Points

stuck in the second part of code challenge

not able to understand whats going wrong in the user.java but theirs no compilation error being shown

public class Forum {
  private String topic;

  // TODO: add a constructor that accepts a topic and sets the private field topic
private Forum(String 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 mfirstName;
private String mlastName; 
  // TODO: add getters for firstName and lastName
  public String getfirstName(){
    return mfirstName;

   public String getlastName(){
    return mlastName;

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

Vladut Astalos
Vladut Astalos
11,246 Points

In your challenge you have a constructor for User class that requires two strings as arguments: 'firstName' and 'secondName'. Than in the constructor you have to initialize those private fields that you declared at the beginning with those argument that are passed into constructor than you write getter methods for them.

private String firstName;
private String lastName;

public User (String firstName, String lastName){
    this.firstName = firstName;
    this.lastName = lastName;

public String getFirstName() {
    return firstName;

public String getLastName () {
    return lastName