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Java Java Objects Delivering the MVP Forum

vincent batteast
vincent batteast
51,094 Points

Are you sure you used the arguments passed in from the main method in Main.java? args[0] is the

not sure on how to fix this one

public class Forum {
  private String topic;

  public Forum (String topic) {
   this.topic = topic; 

  public String getTopic() {
    return 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 {

  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;

public class ForumPost {
  private User author;
  private String title;
  private String 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("vincent", "Batteast");
    // TODO: initialize the forum post with the user created above and a title and description of your choice
    ForumPost post = new ForumPost(author, "dance", "go go");



3 Answers

james south
.a{fill-rule:evenodd;}techdegree seal-36
james south
Front End Web Development Techdegree Graduate 33,271 Points

when you call the User constructor you pass it the first and second elements from the args array, not your first and last name. the args parameter is what you see in the definition of main, public static void Main(String[] args) and would be passed in to your program if you called it from the command line.

vincent batteast
vincent batteast
51,094 Points

Yea, but for some reason it thinks what coming out at the end is not what when in at the began. need to fix it.