Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialPedro Araya
1,912 PointsForum excercise. Task 4 of 4. No idea :(
I don't have any idea of how to complete task 4, any idea?
public class Forum {
private String topic;
// TODO: add a constructor that accepts a topic and sets the private field topic
public String getTopic() {
return topic;
}
public Forum(String topic) {
this.topic = topic;
}
// Uncomment this when you are prompted to do so
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()
);
}
}
public class User {
// TODO: add private fields for firstName and lastName
private String firstName;
private String lastName;
public User(String firstName, String lastName) {
// TODO: set and add the private fields
this.firstName = firstName;
this.lastName = lastName;
}
// TODO: add getters for firstName and lastName
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
}
public class ForumPost {
private User author;
private String title;
private String description;
// TODO: add a constructor that accepts the author, title and 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;
}
}
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);
}
// Uncomment this when prompted
Forum forum = new Forum("Java");
// TODO: pass in the first name and last name that are in the args parameter
User author = new User();
// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost();
forum.addPost(post);
}
}
2 Answers
John Paige
7,436 PointsHey there, Pedro. On Main.java, what you're doing this task is adding parameters to the User author and the ForumPost lines.
// TODO: pass in the first name and last name that are in the args parameter
User author = new User();
/*Remember how in Hangman.java, when you changed the
argument on the new Game() object to accept input
from the command line to pick words besides "treehouse"?*/
// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost();
//this one take three arguments- one for the User object, and two Strings.
John Paige
7,436 PointsNo worries, same thing happened to me. I found this task surprisingly pesky.
Forum forum = new Forum("Java");
User author = new User(args[0], args[1]); // You created an instance of User here...
ForumPost post = new ForumPost(<User object>, <String>, <String>);
// ^^^And you plug the instance into <User object>
forum.addPost(post);
Pedro Araya
1,912 PointsPedro Araya
1,912 PointsThank you very much, I managed to do it by my self,and with your hint!
John Paige
7,436 PointsJohn Paige
7,436 PointsHappy to help!