Passing object as a parameter

Question

When creating a new object of ForumPost, I cannot figure out how to pass the author name of type user. it is the first parameter passed while creating a new object of type ForumPost

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, 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");
    User author = new User("Chirag","Saraogi" );
    ForumPost post = new ForumPost(author,"love", "yayy");
    forum.addPost(post);
  }
}

Answer 1 · 2015-05-27T15:27:01Z

May 27, 2015 3:27pm

Hey,

Thanks for requesting me to answer this. You are soo close. Just missed a few keywords there.

The description it is giving is "I expected to see the names I passed in through the args" , but I didn't pass anything into the agrs. At least not that I know of. Take at look at this sneeky section.

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");
    }

It's appears to be checking for arguments that are coming into the main method. Well, I am not supplying those so the teacher must be. This tells me that it's checking for two arguments being passed into the main. This we can't see which makes this really tuff. So when I create a user, I need to make a user of not myself. But as the agruments being passed in. I need to access these arguments when I create a user.

User author = new User(args[0], args[1]);

See, now the user is being created with the passed in arguments. So change that one line in your Example.java and it should work.

Please let me know if you have additional questions I can try to clear up for you.

Thanks!

Answer 2 · 2015-05-27T15:53:46Z

May 27, 2015 3:53pm

Hi there,

It isn't very clear, I don't think, but the name has been passed in using the args[] of main.

So, if you change your code:

User author = new User("Chirag","Saraogi" );

To pick up the first two args[] like this:

User author = new User(args[0], [args[1]);

That should work for you!

Steve.

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CHIRAG SARAOGI

CHIRAG SARAOGI

Passing object as a parameter

2 Answers

Ryan Ruscett

Ryan Ruscett

CHIRAG SARAOGI

CHIRAG SARAOGI

Ryan Ruscett

Ryan Ruscett

CHIRAG SARAOGI

CHIRAG SARAOGI

Steve Hunter

Steve Hunter

CHIRAG SARAOGI

CHIRAG SARAOGI