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Start your free trialjohn specter
1,025 Pointswrapping things up in java object is giving me a though time- need help
plz i would need your help to pass this challange
public class ForumPost {
private User mAuthor;
private String mTitle;
private String mDescription;
public ForumPost(User author, String title, String description ){
author = mAuthor;
title = mTitle;
description = mDescription;
}
public User getAuthor() {
return mAuthor;
}
public String getTitle() {
return mTitle;
}
public String getDescription(){
return mDescription;
}
// TODO: We need to expose the description
}
public class User {
private String mFirstName;
private String mLastName;
public User(String firstName, String lastName) {
// TODO: Set the private fields here
mFirstName = firstName;
mLastName= lastName;
}
public String getFirstName(){
return mFirstName;
}
public String getLastName(){
return mLastName;
}
}
public class Forum {
private String mTopic;
public Forum (String Topic){
mTopic= Topic;
}
public String getTopic() {
return mTopic;
}
public void addPost(ForumPost post) {
System.out.printf("New post from %s %s about %s.\n",
post.getAuthor().getFirstName(),
post.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(args[0],args[1]);
// Add the author, title and description
ForumPost post = new ForumPost(author,"awsome","i have finished");
forum.addPost(post);
}
}
2 Answers
Anthony Mikhail
9,942 PointsIn your constructor for the ForumPost class, you are not initializing the member variables properly. your code states : description = mDescription;
by doing that you are assigning the description variable reference to the mDescription variable, which is currently null. change it to: mDescription = description;
Obviously do this for all member variables, not only description.
john specter
1,025 Pointsthanks!! I appreciate!