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Kenneth Phillips
Courses Plus Student 10,188 PointsForumPost
It's popping this error message up : 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. I filled in the arguments so I don't get what the problem is.
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;
}
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;
}
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
// TODO: add getters for firstName and 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 User getAuthor() {
return author;
}
public String getTitle() {
return title;
}
public String getDescription() {
return description;
}
public ForumPost(User author, String title, String description) {
this.author = author;
this.title = title;
this.description = 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);
}
Forum forum = new Forum("Java");
// TODO: pass in the first name and last name that are in the args parameter
User author = new User("Jamie", "Phillips");
// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost(author, "The lord of the flies", "A book about how civilization crumbles among boys.");
forum.addPost(post);
}
}
4 Answers
Alexandre Babeanu
10,947 PointsYes this is fairly confusing but you need to use args[0], args[1] for the parameters of the User constructor. I'd say the array args and what it contains should really be specified by the exercise.
basically the args array represents the user input. They want you to create a new user with the user input so it will change depending on what the user inputs.
vincent batteast
51,094 PointsI'm on the same problem and i'm not understand. Can you show code.
Kenneth Phillips
Courses Plus Student 10,188 PointsMy problem was that instead of putting:
User author = new User("Jamie", "Phillips");
I should put
User author = new User(args[0], args[1]);
This references whatever String arguments are put in to the constructor User.
vincent batteast
51,094 PointsThink you. I got it.
Wojciech Cupa
13,521 PointsThank you for the post.
Kenneth Phillips
Courses Plus Student 10,188 PointsKenneth Phillips
Courses Plus Student 10,188 PointsThanks I get what you're saying. They want me to put args[0] and args [1] for the first and last argument. Thank you.