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Start your free trialSaad Hamid
3,150 PointsNot able to complete Challenge Task 4
I am having trouble in completing Challenge Task 4
I am not able to figure out what length is required to clear the challenge
I am trying to put if(!(args.length ==2)) with a logic that if first name and last name are entered only then "args" length would be 2 else it would be less than 2. and in case if it's less than 2, system should exit the program.
Can anyone please help me out with this?
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 {
// 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 this.firstName;
}
public String getLastName()
{
return this.lastName;
}
// TODO: add getters for firstName and 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("Saad", "Hamid");
// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost(author, "Mr", "Aweseme");
forum.addPost(post);
// */
}
}
1 Answer
Steve Hunter
57,712 PointsHi Saad,
The main
method has an argument - it is an array of strings called args
.
The first two elements in that array are the first name, at index 0, and the last name at index 1.
Pass those two things into the User
constructor.
I hope that's enough of a clue but do let me know how you get on.
Steve.
Steve Hunter
57,712 PointsSteve Hunter
57,712 PointsSo, for example, the application is run by calling
main("Saad", "Hamid");
- that's whatargs
holds.