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Java Java Objects Delivering the MVP Forum

Jose Villegas
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Jose Villegas
Full Stack JavaScript Techdegree Student 8,278 Points
Posted by Jose Villegas
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Jose Villegas
Full Stack JavaScript Techdegree Student 8,278 Points

Stuck in the User.java

I have to make the public User(String firstName, String lastName){ private?

Forum.java 
public class Forum {
  private String topic;

  // TODO: add a constructor that accepts a topic and sets the private field topic

  public String getTopic() {
    return topic;
  }
public Forum(String topic) {
    mTopic = 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 mFirstName; 
 private String mLastName;

  public User(String firstName, String lastName) {
    mFirstName = firstName;
    mLastName = lastName;
  }
   public String getFirstName(){
    return mFirstName;
  }

  public String getLastName(){
    return mLastName;
  }

  // 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 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);
    }
    /* Uncomment this when prompted
    Forum forum = new Forum("Java");
    // TODO: pass in the first name and last name that are in the args parameter
    User author = new User();
    // TODO: initialize the forum post with the user created above and a title and description of your choice
    ForumPost post = new ForumPost();
    forum.addPost(post);

// */
  }

}

2 Answers

Isaiah Marin
Isaiah Marin
11,971 Points
Isaiah Marin
Isaiah Marin
11,971 Points

Your Forum.java constructor may also be wrong. This is because your need to assign your private member "private String topic" to the String topic passed in your constructor.

  public class Forum {

// Here is your private String topic
  private String topic;

  // TODO: add a constructor that accepts a topic and sets the private field topic
  public Forum (String topic) {
    this.topic = topic; // Here it assigns your private member variable to the one passed through the constructor.
  }
  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()
    );
  }
  */

}

The second one with the User requires you to make two private String variables. Your code looks correct but I don't think it passed because it asked for specific names "lastName" and "firstName". Here is what worked for me.

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
    this.firstName = firstName;
    this.lastName = lastName;
  }

  // TODO: add getters for firstName and lastName
  public String getFirstName () {
    return this.firstName;
  }
  public String getLastName () {
    return this.lastName;
  }
}