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Java Java Objects Delivering the MVP Forum

please help still stuck here

start

Forum.java
public class Forum {
  private String topic;
  Forum (String topic){
  this.topic=topic;
  }


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

}
User.java
public class User {
  private String firstName;
  private String lastName;
  // TODO: add private fields for firstName and lastName

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

  }

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;

  public ForumPost(User author,String title, String description){
  this.author= author;
  this.title=title;
  this.description=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;
  }
}
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
    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(author, "x", "X");
    forum.addPost(post);

  }

}

4 Answers

first, where it says /* uncomment this when i...... / delete the / */ around the code, and it will be part of the code after that. until then, it is not affecting your code. and then... in Constructor Method Topic() change it to //for these reasons

//put your [this.topic=topic] to 
String topic;                                                          //I need a String named topic for future use.

public Topic(String topic) {                         //a constructor is the first method that shows what the class accepts from 
                                                                      //other classes when used elsewhere in the program.
this.topic = topic;                                          //the content inside topic (Topic(String topic <-----)) is put into 
}                                                                     //the variable made earlier for future use outside of this method names topic
                                                   //{ } creates a scope that means you can create variable inside it that wont be affecting
                                                   //the rest of the code around it, hence why we are able to keep it the same name. even
                                                   //though they are two totally separate variables of memory
Daniel Szepanski
PLUS
Daniel Szepanski
Courses Plus Student 5,098 Points

Hi, at your Forum.java your constructor is missing a public infront of Forum ----> public Forum (String topic){ this.topic=topic; }

Daniel Szepanski
Daniel Szepanski
Courses Plus Student 5,098 Points

And you have to uncomment:

/* 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",
            topic,
            post.getAuthor().getFirstName(),
            post.getAuthor().getLastName(),
            post.getTitle()
    );
  }
  */

Still not going through...what do you mean by uncomment?

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
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(author, "x", "X");
forum.addPost(post);

}

}

thank you Tim...it worked

was it.. worth a best answer? :D