Question 8: Consider the code given below. Identify the appropriate s…

1interface Navigator {
2    boolean hasNext();
3    Object next();
4}
5abstract class Displayable {
6    public abstract void show();
7}
8class BookShelf {
9    private class Book extends Displayable {
10        private String title;
11        public Book(String t) {
12            title = t;
13        }
14        public void show() {
15            System.out.print(title + ", ");
16        }
17    }
18    private class BookIterator implements Navigator {
19        private int index;
20        public BookIterator() {
21            //Constructor
22        }
23        public boolean hasNext() {
24            // Check if there is a next book
25        }
26        public Object next() {
27            // Return the next book
28
29        }
30    }
31    public Navigator getNavigator() {
32        return new BookIterator();
33    }
34    private Book[] books = {new Book("Swami"), new Book("Pyre"),
35                                               new Book("Palace") };
36}
37public class LibraryTest {
38    public static void main(String[] args) {
39        BookShelf shelf = new BookShelf();
40        Navigator nav = shelf.getNavigator();
41        while (nav.hasNext()) {
42            ___________________________________; // LINE 1
43        }
44
45     }
46}