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Java Java Objects (Retired) Delivering the MVP Wrapping up

How do I pass the author?

Author, type User; is formed of 2 strings: firstName and lastName.. How do I pass the author?

ForumPost.java
public class ForumPost {
  private User mAuthor;
  private String mTitle;
  private String mDescription;

  public ForumPost(User author, String title, String description) {
    mAuthor = author;
    mTitle = title;
    mDescription = description;
  }

  public User getAuthor() {
    return mAuthor;
  }

  public String getTitle() {
    return mTitle;
  }

  public String getDescription() {
    return mDescription;
  }

  // TODO: We need to expose the description
}
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;
  }
}
Forum.java
public class Forum {
  private String mTopic;

  public Forum(String topic){
    mTopic = topic;
  }

  public String getTopic() {
      return mTopic;
  }

  public void addPost(ForumPost post) {
     // When all is ready uncomment this...
      System.out.printf("New post from %s %s about %s.\n",
                         post.getAuthor().getFirstName(),
                         post.getAuthor().getLastName(),
                         post.getTitle());

  }
}
Example.java
public class Example {

  public static void main(String[] args) {
    System.out.println("Starting forum example...");
    if (args.length < 2) {
       System.out.println("first and last name are required. eg:  java Example Craig Dennis");
    }
     Forum forum = new Forum("Java");
    // Take the first two elements passed args
     User author = new User("Ilies", "Mihai");
    // Add the author, title and description
     ForumPost post = new ForumPost(author, "Java", "It`s greate to learn!");
     forum.addPost(post);
  }
}

1 Answer

Alexander Nikiforov
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.a{fill-rule:evenodd;}techdegree seal-36
Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points

Hi, You did everything correct, except smallest thing.

Craig wants you to read first and last name through arguments:

So change this:

    // Take the first two elements passed args
    // you created your own "Ilies" and "Mihi"
    //but you should pass here args[0], args[1]
     // User author = new User("Ilies", "Mihai"); 
    User author = new User(args[0], args[1]);

Do you understand how does it work know?

When you run :

javac Example.java && java Example

It will print you:

first and last name are required. eg:  java Example Craig Dennis

Because you need to provide arguments, like

javac Example.java && java Example Craig Dennis

It will print you

New post from Craig Dennis about Java.

In case of your code you hard-coded, author's name ....

Thank you for the help.