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Start your free trialEnyang Mercy
Courses Plus Student 2,339 PointsCompiler error syntax error@ Main.java
Help!!!!!! I cant compile this
public class Forum {
private String topic;
public Forum(String topic) {
this.topic = topic;
}
// TODO: add a constructor that accepts a topic and sets the private field top
public Forum(String topic) {
this.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 {
// TODO: add private fields for firstName and lastName
private String firstName;
private String lastName;
public User(String firstName, String lastName) {
// TODO: set and add the private fields
this.firstName = firstName;
this.lastName = lastName;
}
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
// TODO: add getters for firstName and lastName
}
public class ForumPost {
private User author;
private String title;
private String 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);
}
Forum forum = new Forum("Java");
User author = new User(args[0]args[1]);
ForumPost post = new ForumPost(author,"title","description");
forum.addPost(post);
}
}
2 Answers
andren
28,558 PointsThere are three issues:
- You need to have a comma between the
args[0]
andargs[1]
argument when initializing theUser
class in theMain.java
file. - In the
Forum.java
file you have two constructors, one working one and one incomplete one. You need to remove the incomplete one. - You have not uncommented the commented out code found in
Forum.java
like the challenge has instructed you to.
If you fix these issues like this:
Forum.java
public class Forum {
private String topic;
public Forum(String topic) { // Remove incomplete constructor and keep working one
this.topic = topic;
}
public String getTopic() {
return topic;
}
// The method below is commented out in your code
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()
);
}
}
Main.java
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");
User author = new User(args[0], args[1]); // Place a comma between the two arguments
ForumPost post = new ForumPost(author,"title","description");
forum.addPost(post);
}
}
Then your code will work.