Question 6: Consider the Java code given below. What will the output …

1import java.util.*;
2class Book implements Cloneable {
3    String title;
4    String author;
5    public Book(String t, String a) {
6        this.title = t;
7        this.author = a;
8    }
9    public Book clone() throws CloneNotSupportedException {
10        return (Book) super.clone();
11    }
12    public String toString() {
13        return title + ":" + author;
14    }
15}
16class Library implements Cloneable {
17    String libraryName;
18    List<Book> books;
19    public Library(String l, List<Book> b) {
20        this.libraryName = l;
21        this.books = b;
22    }
23
24    public Library clone() throws CloneNotSupportedException {
25        Library clonedLibrary = (Library) super.clone();
26        clonedLibrary.books = new ArrayList<>();
27        for (Book book : this.books) {
28            clonedLibrary.books.add(book.clone());
29        }
30        return clonedLibrary;
31    }
32}
33public class TestCloning {
34    public static void main(String[] args) throws CloneNotSupportedException {
35        List<Book> books = new ArrayList<>();
36        books.add(new Book("1984", "George Orwell"));
37        books.add(new Book("Outline", "Rachel Cusk"));
38        Library library1 = new Library("Central Library", books);
39        Library library2 = library1.clone();
40        library2.books.get(0).title = "Hanging";
41        System.out.println(library1.books);
42        System.out.println(library2.books);
43    }
44
45}