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Curtis Wyman
9,655 PointsHaving trouble setting a constructor for the Forum class
Probably an easy question to answer, but I believe I am correctly doing the task at hand. The program continues to tell me I need to create a constructor that allows for a String named topic.
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 String getTopic(String topic){
this.topic = topic;
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
michaelcodes
5,604 PointsHi there! So there are two things here. In the code that you have here:
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;
//}
We do not want to comment out this code, this is a getTopic method that is already there and part of the program. Now the code that we have here:
public String getTopic(String topic){
this.topic = topic;
return topic;
}
This code writes a method called getTopic that also returns the topic. This is not a constructor, to create a constructor we want to name it the same as the class name. Additionally, the constructor will not return anything so we don't include a type:
public Forum(String topic) {
this.topic = topic;
}
Altogether with the uncommented code:
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;
}
I hope this helped! take care and happy coding!