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 trial
blue3555
7,436 Pointshelp please i have error said I expected to see the names I passed in through the args. but I do not
help please i have error said I expected to see the names I passed in through the args. but I do not My Code 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("Craig ","Dennis");
//Add the author, title and description
ForumPost post = new ForumPost( author , "You're amazing","that to shout out about how it feels to complete");
forum.addPost(post);
} }
public class ForumPost {
private User mAuthor;
private String mTitle;
private String mDescription;
public ForumPost( User author, String tiltle , String description){
mAuthor = author;
mTitle = tiltle ;
mDescription = description;
}
public User getAuthor() {
return mAuthor;
}
public String getTitle() {
return mTitle;
}
// TODO: We need to expose the description
public String getDescription() {
return mDescription;
}
}
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;
Forum ( String topic){
mTopic = topic ;
}
public String getTopic() {
return mTopic;
}
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("Craig ","Dennis");
//Add the author, title and description
ForumPost post = new ForumPost( author , "You're amazing","that to shout out about how it feels to complete");
forum.addPost(post);
}
}
3 Answers
James Simshaw
28,738 PointsTo get the values that you passed in as arguments you have to reference them. For example:
System.out.println(args[0]);
would print out the first argument.
Stephen Bone
12,359 PointsHi Ahmed
So at the minute with the new user object you're creating in Example.java you're hard coding the values Craig, Dennis.
Instead what it wants you to do is take in the first two arguments passed in from the command line. So to do this we use indexing just like we would with an array or a list. For example for the first argument we would use args[0] and args[1] for the second argument.
Hope it helps!
Stephen
blue3555
7,436 PointsHi Stephen Thanks Stephen for help me out . That was helpful .
mrbrutus
8,047 PointsAdding to Stephen Bone's comment, it should look something like this:
User author = new User(args[0], args[1]);
blue3555
7,436 Pointsblue3555
7,436 Pointssorry I do not understand what do you mean about that (note that the last task in Challenge ) 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("Craig","Dennis"); // Add the author, title and description ForumPost post = new ForumPost( author,"shout out","how it feel to complete This challenge");
forum.addPost(post); System.out.println(post); } }