I have my program coded but I am throwing 5 errors.
I am sort of lost ... being a novice :)
The error is: symbol: class str    ???

Any comments would be helpful ... Thank you!

*************program below*********************
import TerminalIO.KeyboardReader;

public class LibraryInterface {

  public static void main (String[] args){

     // Instantiate the Patrons & Books and the keyboard

     Patron patron1 = new Patron();

     Patron patron2 = new Patron();

                       Patron patron3 = new Patron();

     KeyboardReader reader = new KeyboardReader();

     String name;

     str book;

     // Input the first patron's data

     name = reader.readLine("Enter the first patron's name: ");

     patron1.setName(name);

     for (int i = 1; i <= 3; i++){

        book = reader.readLine("Enter the book's title: ");

        student1.setbook(i, book);

     }

     // Input the second student's data

     name = reader.readLine("Enter the second patron's name: ");

     patron2.setName(name);

     for (int i = 1; i <= 3; i++){

        book = reader.readLine("Enter the book's title: ");

        patron2.setbook(i, book);

     }

                       // Input the third student's data

     name = reader.readLine("Enter the third patron's name: ");

     patron3.setName(name);

     for (int i = 1; i <= 3; i++){

        book = reader.readLine("Enter the book's title: ");

        patron3.setbook(i, book);

     }

     // Output the three patrons information

     System.out.println(patron1);

     System.out.println(patron2);

                       System.out.println(patron3);

  } // end method

} //end class

import TerminalIO.KeyboardReader;

public class LibraryInterface {

  public static void main (String[] args){

     // Instantiate the Patrons & Books and the keyboard

     Patron patron1 = new Patron();

     Patron patron2 = new Patron();

                       Patron patron3 = new Patron();

     KeyboardReader reader = new KeyboardReader();

     String name;

     str book;

     // Input the first patron's data

     name = reader.readLine("Enter the first patron's name: ");

     patron1.setName(name);

     for (int i = 1; i <= 3; i++){

        book = reader.readLine("Enter the book's title: ");

        student1.setbook(i, book);

     }

     // Input the second student's data

     name = reader.readLine("Enter the second patron's name: ");

     patron2.setName(name);

     for (int i = 1; i <= 3; i++){

        book = reader.readLine("Enter the book's title: ");

        patron2.setbook(i, book);

     }

                       // Input the third student's data

     name = reader.readLine("Enter the third patron's name: ");

     patron3.setName(name);

     for (int i = 1; i <= 3; i++){

        book = reader.readLine("Enter the book's title: ");

        patron3.setbook(i, book);

     }

     // Output the three patrons information

     System.out.println(patron1);

     System.out.println(patron2);

                       System.out.println(patron3);

  } // end method

} //end class

public class Book {

           //instance varibles

           private String author, title;

           //construction method

           public Book()

           {

                       author = " ";

                       title = " ";

           }

           //another constructor method - same name

           public Book(String author, String title)

           {

                       author = author;

                       title = title;

           }

           public String author()

           {

                       return(author);

           }

           public String title()

           {

                       return(title);

           }

           public String toString()

           {

                       return("Title: " + title + "\n" + "Author:" +
author);

           }

}