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Benyam Ephrem
3,185 PointsHow do I pass a "User" into the constructor?
I keep getting the error:
./Example.java:10: error: constructor ForumPost in class ForumPost cannot be applied to given types; ForumPost post = new ForumPost("Benyam", "Coding is hard but fun", "Coding takes practice."); ^ required: User,String,String found: String,String,String reason: actual argument String cannot be converted to User by method invocation conversion 1 error
What does it mean to pass a User in? Doesn't the user constructor accept strings? What data type does it want?
public class ForumPost {
private User mAuthor;
private String mTitle;
private String mDescription;
public ForumPost(User authorName, String title, String description)
{
mAuthor = authorName;
mTitle = title;
mDescription = description;
}
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 topicName)
{
mTopic = topicName;
}
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");
User author = new User("Benaym", "Ephrem");
ForumPost post = new ForumPost("Benyam", "Coding is hard but fun", "Coding takes practice.");
forum.addPost(post);
}
}
1 Answer
Craig Dennis
Treehouse TeacherYou need to pass the User that gets created:
User author = new User("Benaym", "Ephrem");
into the forum post.
HINT: Also if you read the instructions carefully, the User should be setup using values from the args array.