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Start your free trialDaniel Schwemmlein
4,960 Pointsjava objects wrapping up challenge 3/4 got stuck
in task 3 they are asking: about a "ForumPost. It's going to need a constructor that takes a User author a String title and a String description. Don't forget to initialize the member fields in the constructor. Also please add the getter for mDescription." -ok. I know how a constructor works. However, the first sentence confuses me. It says it takes a user author a String title and a String description. When it then says "Don't forget to initialize the member fields" I don't know what to do at all. Can someone please help? Thanks
public class ForumPost {
private User mAuthor;
private String mTitle;
private String mDescription;
public User getAuthor() {
return mAuthor;
}
public String getTitle() {
return mTitle;
}
// TODO: We need to expose the description
}
public class User {
private String mFirstName; //we make it a String type : TYPE and mSomeName was a hint
private String mLastName;
public User(String firstName, String lastName) {
mFirstName = firstName; //we are assigning firstName to mFirstName
mLastName = lastName;
// TODO: Set the private fields here
}
public String getFirstName() {
return mFirstName;
}
public String getLastName() {
return mLastName;
}
}
public class Forum {
private String mTopic;
public String getTopic() {
return mTopic;
}
public Forum(String topic) {
mTopic = topic;
}
public void addPost(ForumPost post) {
/* When all is ready uncomment this...
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();
// Add the author, title and description
// ForumPost post = new ForumPost();
// forum.addPost(post);
}
}
1 Answer
Oktay Altay
2,329 PointsWhat they mean with initialize the member fields is, Give the member fields a value. The variables that starts with (m) like "mAuthor" are called member fields.
I hope this helps,