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Java Java Objects Delivering the MVP Forum

koren lahav
koren lahav
963 Points
Posted by koren lahav
koren lahav
963 Points

i stuck in loop!

when i got to the fourth task there was an error that sad i need to put return kind type in the constructor so i put void. then it sad that task one not working because there is void in the constructor so i deleted it and than it say in task fourth there is an error again. how do i get out of this!?

Forum.java 
public class Forum {
  private String topic;

  // TODO: add a constructor that accepts a topic and sets the private field topic
public void setTopic(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",
            topic,
            post.getAuthor().getFirstName(),
            post.getAuthor().getLastName(),
            post.getTitle()
    );
  }


}
User.java 
public class User {
  private String firstName;
    private String lastName;
public String getFirstName(){
  return firstName;
}
  public String getLastName(){
  return lastName;
}
  public User(String firstName, String lastName) {
   this.firstName =firstName;
    this.lastName =lastName;

  }

  // TODO: add getters for firstName and lastName

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

  // TODO: add a constructor that accepts the author, title and description
public void post(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;
  }
}
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();
    forum.setTopic("java");
    User author = new User(args[0],args[1]);
    // TODO: initialize the forum post with the user created above and a title and description of your choice
    ForumPost post = new ForumPost();
    post.post(author,"java","sgf");
    forum.addPost(post);


  }

}

2 Answers

Jonas Gamburg
Jonas Gamburg
11,193 Points
Jonas Gamburg
Jonas Gamburg
11,193 Points

Well, your class Forum doesn't have a constructor, therefore you'll need to add one.

//Constructor for class Forum:
public Forum(String topic) {
   this.topic = topic;
}

In fact I can't really see that you've added constructor to any of your classes. Remember a constructor method does not return anything and it is named after the class it is in. Each class needs to have a constructor of it's own.

koren lahav
koren lahav
963 Points
koren lahav
koren lahav
963 Points

i did put a constructor but it's still say i need to put void on the constructor, and when i put void it's say the first task not working,so i change its name to see if it work and it's doesn't

koren lahav
koren lahav
963 Points
koren lahav
koren lahav
963 Points

never mind i found the problem, I accidentally deleted part of the main at the start and i didn't noticed it until i restarted the task.