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Java Java Objects (Retired) Delivering the MVP Wrapping up

Sang Tran
Sang Tran
6,918 Points

Wrapping things up Challenge Task 4

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("First","Last"); // Add the author, title and description ForumPost post = new ForumPost(author, "title","description"); 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 User getAuthor() {
    return mAuthor;
  }

  public String getTitle() {
    return mTitle;
  }

  public String getDescription() {
   return mDescription; 
  }
}
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) {
      //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("First","Last");
    // Add the author, title and description
    ForumPost post = new ForumPost(author, "title","description");
    forum.addPost(post);
  }
}

1 Answer

Hey,

You need to use args for the first name and the last name.

Check out the link below to get more information about args.

http://stackoverflow.com/questions/890966/what-is-string-args-parameter-in-main-method-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(args[0], args[1]);
    // Add the author, title and description
    ForumPost post = new ForumPost(author, "Title - TeamTreeHouse", "I love descriptions!");
    forum.addPost(post);
  }
}
Sang Tran
Sang Tran
6,918 Points

Thanks. I understand now.