Stuck in HashMap

Question

Thank you for your reply. I have re-worked my code and only issue I have in the compiler is with the displayMap method. I have no idea if this is going to work after I fix this issue. However, I'm reposting the requirements and my classes to see if you can spot my errors. It's such a shame that books and tutorials are so weak in such an important subject and I can't seem to find someone to talk to and to guide me on HashMaps. I do understand perfectly what it is suppose to do, but can't seem to grasp the concepts to implement them. Thank you again for your assistance.
Requirement 1: Implement your author tracking application. You do not have to read the book information from a file. You may enter it from the keyboard. You'll need to enter author last name and book title. No duplicate entries for an author last name should be stored; therefore be sure to use the appropriate collection class to store your author names. No book titles will be stored.
Requirement 2: Create an Author class that stores author's name and total royalties. Create an AuthorCode hashmap to store an author id and Author class. Use author id as the key and Author Class as the value.
Test application: Your test application should print the list of authors sorted alphabetically when done inputing authors and titles (tests implementation of requirement 1). Be sure to test multiple books for the same author to ensure you are not storing duplicates. To test requirement 2, your test application will prompt you for an author ID and using method(s) on HashMap, provide you a readable output of the Author's information for the entered author id.
Hint: You may want to look into overriding toString() method to provide a readable string representation of Author object. - with the help of NetBean and my revisions, this method was created.
First you need to take the author information read in and store in an author class. - Hopefully, I have done this step.
Call the constructor for your Author class with the author/book information you read in:
new Author(authorNameReadInString, bookTitleReadInString) - This one is not clear for me at all.
You'll want to put this in the map. Create an author id for the key. TO do this you can just increment i each time you add an author. Be sure to initialize i.
int i = 0;
map.put(i, new Author(authorNameReadInString, bookTitleReadInString); - when I do this step with variables, I get multiple errors.  This method took the call to my class AuthorRoyal and most of the erros were gone.
I didn't provide perfect syntax but hopefully this sheds some light.
I'm having to post my code in separate sections because of the forums' length limitation.

Answer 1

Oops the other class was my AuthorRoyal class. Here is the main class
import java.util.StringTokenizer;
import java.util.Map;
import java.util.HashMap;
import java.util.Set;
import java.util.TreeSet;
import java.util.Scanner;
public class AuthorMapMain {
  private Map < Integer, AuthorRoyal> authorcode;
  private Scanner scanner;
  int i = 0;
  public AuthorMapMain()
     authorcode = new HashMap< Integer, AuthorRoyal > (); // create HashMap
     scanner = new Scanner( System.in ); // create scanner
     createMap(); // create map based on user input
     displayMap(); // display map content
  // method to create map from user input
  private void createMap()
    System.out.println( "Enter author fist name, last name, and book title:"); // prompt for user input
    String a = scanner.nextLine( ); // reads user input following the prompt
      // create StringTokenizer for input
      StringTokenizer tokenizer = new StringTokenizer( a );
      // processing input text
      while ( tokenizer.hasMoreTokens() ) // while more input
         // if the map contains the word
            String authorid = tokenizer.nextToken(); // get author
         if ( authorcode.containsKey( authorid ) ) // is key in map
             authorcode.put(i, new AuthorRoyal());
           } // end if
        // else
          //     authorcode.put ( );
          // add new word with a count of 1 to map
       } // end while
     // display map content
   private void displayMap()
      // sort keys
      Set< Integer > keys = authorcode.keySet(); // get keys
      TreeSet< String > sortedKeys = new TreeSet< String >( keys ); // ERROR after new TreeSet appears in NetBean underlined
      System.out.println( "Map contains:\nKey\t\tValue" );
      // generate output for each key in map
      for ( String key : sortedKeys )
         System.out.printf( "%-10s%10s%10s%n", key, authorcode.get( key ) );
      System.out.printf(
         "%nsize:%d%nisEmpty:%b%n", authorcode.size(), authorcode.isEmpty() );
   } // end method displayMap
    public static void main(String[] args) {
     // new AuthorRoyal();
      new AuthorMapMain();
}