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Java Java Objects Delivering the MVP Forum

After you uncomment the code in Main.java and Forum.java, fix the code as described in the comments of Main.java

Getting this error "Are you sure you used the arguments passed in from the main method in Main.java? args[0] is the firstName and args[1] should be the last name"

Forum.java
public class Forum {
  private String topic;

  public Forum(String topic){
    this.topic = topic; 
  }

  public String getTopic() {
    return topic;
  }



  public void addPost(ForumPost post) {
    System.out.printf("A new post in %s topic from %s  about %s is available",

            post.getAuthor().getFirstName(),
            post.getAuthor().getLastName(),
            post.getTitle()
    );
  }

}
User.java
public class User {
  private String firstName;
  private String lastName;

  public User(String firstName, String lastName) {
    this.firstName = firstName; 
    this.lastName = lastName; 
  }

  public String getFirstName(){
    return firstName;
  }

  public String getLastName(){
    return lastName;
  }

}
ForumPost.java
public class ForumPost {
  private User author;
  private String title;
  private String description;

  public ForumPost(User author, String title, String description){
    this.author = author; 
    this.title = title; 
    this.description = 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);
    }

    Forum forum = new Forum("Java");

    String firstName = args[0];
    String lastName = args[1];
    User author = new User(firstName, lastName); 
    ForumPost post = new ForumPost(author, "title", "description");
    forum.addPost(post);


  }

}

4 Answers

Dino Šporer
Dino Šporer
5,430 Points

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() ); }

thanks @Dino Šporer, it worked

Dino Šporer
Dino Šporer
5,430 Points

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

I think you will get it!

Bummer! Are you sure you used the arguments passed in from the main method in Main.java? args[0] is the firstName and args[1] should be the last name. 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); } Forum forum = new Forum("Java");

User author = new User(args[0], args[1]);
ForumPost post = new ForumPost(author, "title", "description");
forum.addPost(post);

}

Dino Šporer
Dino Šporer
5,430 Points

Forum forum = new Forum("Java"); User author = new User(args[0], args[1]); ForumPost post = new ForumPost(author, "title", "description"); forum.addPost(post);

and you miss topic at add post method in main.java :D