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Java Java Objects (Retired) Delivering the MVP Wrapping up

Mindaugas Rozanskas
PLUS
Mindaugas Rozanskas
Courses Plus Student 978 Points

How to define Author? I write my name and it says that I need to enter User not a String. So how to define User?

Forum forum = new Forum("Java"); // Take the first two elements passed args User author = new User(); // Add the author, title and description ForumPost post = new ForumPost(); forum.addPost(post);

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 String getDescription(){
    return mDescription;
  }

  public User getAuthor() {
    return mAuthor;
  }

  public String getTitle() {
    return mTitle;
  }

  // TODO: We need to expose the description
}
User.java
public class User {
    private String mFirstName ;
      private String mLastName;

  public User(String firstName, String lastName) {
    // TODO:  Set the private fields here
   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) {

      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();
    // Add the author, title and description
     ForumPost post = new ForumPost();
    forum.addPost(post);
  }
}

1 Answer

Yongshuo Wang
Yongshuo Wang
5,500 Points

Hi, From I can see, the user constructor takes 2 parameters.