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Start your free trialwelsen ho
1,330 PointsStill can't solve the problem
Is there something wrong with my code?
error shows: ./Main.java:13: error: constructor User in class User cannot be applied to given types; User author = new User(args[2]); ^ required: String,String found: String reason: actual and formal argument lists differ in length ./Main.java:15: error: incompatible types: String cannot be converted to User ForumPost post = new ForumPost("new","code","finished"); ^ Note: JavaTester.java uses unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details. Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output 2 errors
public class Forum {
private String topic;
// TODO: add a constructor that accepts a topic and sets the private field topic
public String getTopic() {
return topic;
}
public Forum(String topic){
this.topic = topic;
}
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;
// 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);
}
Forum forum = new Forum("Java");
// TODO: pass in the first name and last name that are in the args parameter
User author = new User(args[2]);
// TODO: initialize the forum post with the user created above and a title and description of your choice
ForumPost post = new ForumPost("new","code","finished");
forum.addPost(post);
}
}
1 Answer
Yanuar Prakoso
15,196 PointsHi Welsen
You almost done it. You just need to repair your Main class:
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");
// TODO: pass in the first name and last name that are in the args parameter
// User author = new User(args[2]);<-- this is wrong since args starts indexing from [0], you should change it to:
User author = new User(args[0], args[1]);//<--remember args[0] = firstName, args[1] = lastName
// TODO: initialize the forum post with the user created above and a title and description of your choice
// ForumPost post = new ForumPost("new","code","finished");<--this is wrong it supposed to be
ForumPost post = new ForumPost(author, "Java", "Forum about Java Programing");
// please note that the topic "Java" and the description is entirely up to you to input it just an example
forum.addPost(post);
}
}
I hope this can help a little.