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Gonzalo Torres del Fierro
Courses Plus Student 16,751 Pointsi need help i get lost here...
i know i´m close, but i get lost..
public class Forum {
private String topic;
// TODO: add a constructor that accepts a topic and sets the private field 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 %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 = userAuthor;
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);
}
Forum forum = new Forum("Java");
// TODO: pass in the first name and last name that are in the args parameter
User author = new User("Gonzalo","Torres");
// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost(something here!!!,"nuevo","rumbo");
forum.addPost(post);
}
}
2 Answers
Chris Jones
Java Web Development Techdegree Graduate 23,933 PointsAre you getting an error on this line?
ForumPost post = new ForumPost(something here!!!,"nuevo","rumbo");
If so, it looks like the ForumPost constructor takes a User object in the parameter that currently has "something here!!!". Change "something here!!!" to the User object you just created called author and that should help.
I don't know if it will solve everything, but it's the first thing I came across.
I hope that helps!
Gonzalo Torres del Fierro
Courses Plus Student 16,751 Pointsthx Chris, the problem , is i try several approaches, and i think i need some help, i would like to know how to call properly the "author" having on mind that author, has his own way, because it is a "User" type, and go throw and from another class.... if you can share your solution would be nice...and thx again
Chris Jones
Java Web Development Techdegree Graduate 23,933 PointsNot a problem! After looking at the code challenge, you'll also need to pass the main method's parameters into the construction of the author variable, which is a User object. The User constructor takes two parameters, firstName and lastName, and you are to assume that these are passed to the String[] args variable in the main method.
I apologize if that was a little confusing, so here is the code. Let me know if you have any more questions!
Forum.java:
public class Forum {
private String topic;
// TODO: add a constructor that accepts a topic and sets the private field topic
public Forum(String topic) {
this.topic = topic;
}
public String getTopic() {
return 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()
);
}
}
User.java:
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;
}
}
ForumPost.java:
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;
}
}
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);
}
//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(args[0], args[1]);
// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost(author, "A Title", "A Description");
forum.addPost(post);
// */
}
}