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Start your free trialShiva Lowy
Full Stack JavaScript Techdegree Student 3,240 PointsI am very confused on where to start with this code
I am very confused on this code. Maybe someone can help me understand it?
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;
}
/* 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
public User(String firstName, String lastName) {
// TODO: set and add the private fields
}
// 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 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);
// */
}
}
1 Answer
Trent Christofferson
18,846 PointsThe first step asks you to create a constructor. A constructor is used when creating, in this case, a new ForumPost. Your constructor should be
public ForumPost(String topic) {
this.topic = topic;
}
this constructor will make it so whenever someone creates a new ForumPost they need to pass in a String topic like so
ForumPost post = new ForumPost("Java");
"Java" is then stored in the variable topic inside the () in the constructor and then you set the private field topic to the topic passed in.