Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialjose rodriguez
16,524 PointsI am finished up but compiler is throwing a code for a part that I dont think I was supposed to change
now that I finally got to this last part. I worked my way to 4 of 4 and hit check work. the "Bummer" sign shows and i check what is wrong and it give me the following message. any suggestions on how to fix this?
./Main.java:16: error: non-static method addPost(ForumPost) cannot be referenced from a static context Forum.addPost(post); ^ Note: JavaTester.java uses unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details. 1 error
public class Forum {
private String topic;
// TODO: add a constructor that accepts a topic and sets the private field topic
public Forum(String topic){
this.topic = 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 {
private String firstName;
private String lastName;
// TODO: add private fields for firstName and lastName
public User(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = 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 ForumPost(User author , String title, String description){
this.author = author;
this.title = title;
this.description = 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(args[0], args[1]);
// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost( author, "title", "new description");
Forum.addPost(post);
}
}
2 Answers
samiff
31,206 PointsHey Jose,
You were super close, but made a small typo in Main.java:
Forum.addPost(post);
You are referencing the Forum
class, rather than your instantiated object instance forum
with a lower case f
that you created earlier. Make that small change and all should be well!
jose rodriguez
16,524 Pointsawesome, worked, thank you!