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Java Java Objects Delivering the MVP Forum

NAJEEBULLAH KHAN
NAJEEBULLAH KHAN
2,967 Points
Posted by NAJEEBULLAH KHAN
NAJEEBULLAH KHAN
2,967 Points

i uncomented

still asking me to uncomment while i did already

Forum.java 
public class Forum {
  private String topic;

  public Forum(String topic){
    this.topic = topic; // <--- same here :)
  }

  public String getTopic() {
    return topic;
  }


}
User.java 
public class User {
  private String firstName;
  private String lastName;

  public User(String firstName, String lastName) {
    this.firstName = firstName; // <--- your code will be different here
    this.lastName = lastName; //<---- and here
  }

  public String getFirstName(){
    return firstName;
  }

  public String getLastName(){
    return lastName;
  }

}
ForumPost.java 
public class ForumPost {
  private User author;
  private String title;
  private String description;

  public ForumPost(User author, String title, String description){
    this.author = author; //<--- your code will be different here
    this.title = title; // <---- and here
    this.description = description; //<---- aaand here 

  }

  public User getAuthor() {
    return author;
  }

  public String getTitle() {
    return title;
  }

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

    Forum forum = new Forum("Java");
    String firstName = args[0];
    String lastName = args[1];
    User author = new User(firstName, lastName); 


    ForumPost ForumPost = new ForumPost(author, "Programming is awesome", "Cuz it makes us create new stuff");


  }

}

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

You did more than just uncomment the code, you removed parts of the code and also modified some code you were not supposed to.

In Forum.java the commented code was this:

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()
    );
  }

Which you have removed entirely from the file.

In Main.java you changed the name of the ForumPost object from being called post to being called ForumPost which is an invalid name since it is the same as the class name.

You also removed this line forum.addPost(post); from the Main.java file.

If you change the Forum.java file to look exactly like this:

public class Forum {
  private String topic;

  public Forum(String topic){
    this.topic = topic; // <--- same here :)
  }

  public String getTopic() {
    return topic;
  }

  // Added this function which had been removed
  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()
    );
  }
}

And the Main.java file to look exactly like this:

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);
    }

    Forum forum = new Forum("Java");
    String firstName = args[0];
    String lastName = args[1];
    User author = new User(firstName, lastName); 

    // Changed object name from ForumPost to post
    ForumPost post = new ForumPost(author, "Programming is awesome", "Cuz it makes us create new stuff");
    // Added this line which had been removed
    forum.addPost(post);
  }
}

Then your code will work.