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Start your free trialMatt Song
2,971 PointsDon't know why this doesn't work.
I did what I thought should work, but now I'm getting tons of errors and the code "Forum forum = new Forum("Java");" Which I didn't even code, doesn't work also. Someone please help me!
public class Forum {
private String topic;
// TODO: add a constructor that accepts a topic and sets the private field topic
public void setTopic(String 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 void User(String firstName, String lastName) {
// TODO: set and add the private fields
firstName = "";
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 void User(User author, String title, String description) {
author = "";
title = "";
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(String getFirstName, String getLastName);
// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost(getAuthor, getTitle, getDescription);
forum.addPost(post);
}
}
Kelvin Warui
Courses Plus Student 878 PointsIn your forum class you seem to be missing a constructor which should have a string argument .You are invoking the default constructor when your create an instance of forum and the error is caused when you try and pass the "java " string to it as the default constructor has no parameter .
1 Answer
Joseph Wasden
20,406 PointsSee the replies from other students for more info. :)
Brian Pedigo
26,783 PointsBrian Pedigo
26,783 PointsHi Matt after quickly looking over your code it seems that in your Forum class you made a setter method instead of constructor
Also your ForumPost class's constructor was off:
Recheck your code for proper constructor creation. Remember constructors do not have a return type. There might be a few more errors but this should get you going in the right direction.