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Marcus Schumacher
16,616 PointsJava Problem: PLEASE HELP
Here is the prompt I am given:
Finally, uncomment the addPost method in Forum.java. Then for the last task, uncomment the main method in Example.java fixing the bugs as you go to use the new working code. For the forum post title and description, use that to shout out about how it feels to complete this challenge.
I have changed some stuff in Forum.java and Example.java. I can't for the life of me figure out why this is not working.
public class ForumPost {
private User mAuthor;
private String mTitle;
private String mDescription;
public ForumPost(User author, String title, String description) {
mAuthor = author;
mTitle = title;
mDescription = description;
}
public String getDescription() {
return mDescription;
}
public User getAuthor() {
return mAuthor;
}
public String getTitle() {
return mTitle;
}
// TODO: We need to expose the description
}
public class User {
private String mFirstName;
private String mLastName;
public String getFirstName() {
return mFirstName;
}
public String getLastName() {
return mLastName;
}
public User(String firstName, String lastName) {
mFirstName = firstName;
mLastName = lastName;
}
}
public class Forum {
private String mTopic;
public String getTopic() {
return mTopic;
}
public Forum(String topic) {
mTopic = topic;
}
public void addPost(ForumPost post) {
System.out.printf("New post from %s %s about %s.\n",
author.getAuthor().getFirstName(),
author.getAuthor().getLastName(),
post.getTitle());
}
}
public class Example {
public static void main(String[] args) {
System.out.println("Starting forum example...");
if (args.length < 2) {
System.out.println("first and last name are required. eg: java Example Craig Dennis");
}
Forum forum = new Forum("Java");
// Take the first two elements passed args
User author = new User("Marcus", "Schumacher");
// Add the author, title and description
ForumPost post = new ForumPost("Marcus", "This is great", "Hopefully I'm done soon");
forum.addPost(post);
}
}
2 Answers
hbdc
13,725 PointsYou are calling the getAuthor().getFristName() and getAuthor().getLastName() methods from author, which is not a valid object which has been instantiated.
You need to call those methods on the post object:
System.out.printf("New post from %s %s about %s.\n",
post.getAuthor().getFirstName(),
post.getAuthor().getLastName(),
post.getTitle());
Marcus Schumacher
16,616 PointsNever mind I got it thanks for the help
hbdc
13,725 PointsNo probs. If you are happy please mark as best answer.
Cheers
Marcus Schumacher
16,616 PointsMarcus Schumacher
16,616 PointsThat helped me a lot. But now the challenge is saying this:
Bummer! I expected to see the names I passed in through the args, but I do not. Hmm.
Here is the code I believe is in question:
public class Example {
public static void main(String[] args) { System.out.println("Starting forum example..."); if (args.length < 2) { System.out.println("first and last name are required. eg: java Example Craig Dennis"); } Forum forum = new Forum("Java"); // Take the first two elements passed args User author = new User("Marcus", "Schumacher"); // Add the author, title and description ForumPost post = new ForumPost(author, "My post", "A post about stuff"); forum.addPost(post); } }