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Java Java Objects Delivering the MVP Forum

Posted by mark niles
mark niles
2,303 Points

Need some help ASAP!!!!! :(

i can't sole the task 4

  • After you uncomment the code in Main.java and Forum.java, fix the code as described in the comments of Main.java. Task 4
Forum.java 
public class Forum {
private String topic;
private forum(String topic){
  mtopic=topic;
}

  // TODO: add a constructor that accepts a topic and sets the private field 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 {
  // TODO: add private fields for firstName and lastName
  private String firstName;
  private String lastName;


  public User(String firstName, String lastName) {
    // TODO: set and add the private fields
    mfirstName= firstName;
    mlastName=lastName;

  }
public String getFirstName(){
  return firstName;
}
  public String getLastName(){
    return 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
  private forum ( User author,String title,String description){
    mauthor=author;
    mtitle=tile;
    mdescription=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("Java");
    // TODO: pass in the first name and last name that are in the args parameter
     UserAuthor = 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(author, "the Title", "The Description");
    forum.addPost(post);

  }

}

4 Answers

akiva grobman
akiva grobman
9,160 Points
akiva grobman
akiva grobman
9,160 Points

The constructors must be spelled exactly like the class name

Fabian Pijpers
PLUS
Fabian Pijpers
Courses Plus Student 41,372 Points
Fabian Pijpers
Fabian Pijpers
Courses Plus Student 41,372 Points

when using a constructor getForum(String forum) { return forum; }

oageletse90
oageletse90
5,749 Points
oageletse90
oageletse90
5,749 Points

//Looking at your code on {ForumPost.java} your constructor is private Forum but the Class is ForumPost, thats the first mistake.2. still under that you wrote mTitle = tile, second mistake.

my advice will be "Can you please try to use the [this] KeyWord on your constructors...

public ForumPost(User author, String title){ this.author = author; this.title = title; ..... }"

// TODO: pass in the first name and last name that are in the args parameter
String firstName = args[0];
String lastName = args[1];

User author = new User(firstName, lastName);

// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost(author, "Programming is Good", "It teaches how to create new things");
forum.addPost(post);
Fabian Pijpers
PLUS
Fabian Pijpers
Courses Plus Student 41,372 Points
Fabian Pijpers
Fabian Pijpers
Courses Plus Student 41,372 Points

Maybe i will have to look into this deeper or ask a few other students they might come with a better answer. I am out of the java track for some time now, so i am not up to speed. As to give you a better contructed answer. sorry