Question

cs55(java) please.

Write a class called Book that contains instance data for the title, author, publisher, price, and copyright date. Define the Book constructor to accept and initialize this data. Include setter and getter methods for all instance data. Include a toString method that returns a nicely formatted, multi-line description of the book. Write another class called Bookshelf, which has name and array of Book objects. Bookself capacity is maximum of five books. Includes method for Bookself that adds, removes, isFull( returns Boolean), isEmpty(returns Boolean) and toString method that returns all information about the Books in the Bookself. Create a driver class called TestBookshelf, whose main method instantiates five Book objects, instantiates one Bookshelf, updates the Books, and add or remove the Books to the Bookshelf, isDuplicate(Book b). Make sure to print information of the Bookshelf every time you update the Books or the Bookshelf. Add as many API that you think is good to have for the Bookshelf class.

Answer 1

Thanks for the question.
Here is the completed code for this problem. Let me know if you have any doubts or if you need anything to change.
Thank You !!
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import java.text.SimpleDateFormat;
import java.util.Date;

public class Book {

    private String title;
    private String author;
    private String publisher;
    private double price;
    private Date copyrightDate;

    public Book() {
        title = "";
        author = "";
        publisher = "";
        price = 0.0;
        copyrightDate = null;
    }

    public Book(String title, String author, String publisher, double price, Date copyrightDate) {
        this.title = title;
        this.author = author;
        this.publisher = publisher;
        this.price = price;
        this.copyrightDate = copyrightDate;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getPublisher() {
        return publisher;
    }

    public void setPublisher(String publisher) {
        this.publisher = publisher;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public Date getCopyrightDate() {
        return copyrightDate;
    }

    public void setCopyrightDate(Date copyrightDate) {
        this.copyrightDate = copyrightDate;
    }

    @Override
    public String toString() {

        String pattern = "MM-dd-yyyy";
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(pattern);
        String date = simpleDateFormat.format(copyrightDate);


        return
                "Title: " + title +
                        "\nAuthor: " + author +
                        "\nPublisher: " + publisher +
                        "\nPrice: $" + price +
                        "\nCopyright Date: " + date;

    }

    public boolean isDuplicate(Book b) {
        return getTitle().equals(b.getTitle()) &&
                getPublisher().equals(b.getPublisher());
    }
}

========================================================================================

public class Bookshelf {

    private final static int MAX_SIZE=5;
    private Book[] books;
    private int bookCount;

    public Bookshelf(){
        books = new Book[MAX_SIZE];
        bookCount=0;
    }

    public void addBook(Book book){
        if(bookCount<MAX_SIZE){
            books[bookCount++]=book;
        }
    }

    public void removeBook(Book book){
        int indexToDelete=-1;
        // first compare the book to find the index
        // where the book is located
        // two books are same if title and publisher are same
        for(int i=0;i<bookCount;i++){
            Book bookAtIndex=books[i];
            if(book.getTitle().equals(bookAtIndex.getTitle()) &&
            book.getPublisher().equals(bookAtIndex.getPublisher())){
               indexToDelete=i;break; // if the book is found we break out
            }
        }
        if(indexToDelete==-1)return; // book not found
        if(indexToDelete==bookCount-1){ // if the book is the last book
            bookCount--; // we simply decrease the book count by 1
            return;
        }
        // shift the book to one place to the left
        for(int index=indexToDelete;index<bookCount-1;index++){
           books[index]=books[index+1];
        }
        // decrease the count of book by 1
        bookCount--;
    }

    public boolean isFull(){
        return bookCount==MAX_SIZE;
    }
    public boolean isEmpty(){
        return bookCount==0;
    }

    @Override
    public String toString() {
        StringBuffer buffer = new StringBuffer();
        for(int index=0;index<bookCount;index++){
            buffer.append(books[index]).append("\n");
        }
        return buffer.toString();
    }


}

========================================================================================

import java.text.ParseException;
import java.text.SimpleDateFormat;


public class TestBookShelf {

    public static void main(String[] args) {
        SimpleDateFormat dateformat= new SimpleDateFormat("dd/MM/yyyy");
        Bookshelf shelf = new Bookshelf();
        Book[] books = new Book[5];
        try {
            books[0] = new Book("A Tale of Two Cities","Jane Austin","Pearson",16.55,dateformat.parse("12/08/190"));
            books[1] = new Book("C++ Concise","Oliver Smith","Tata McGraw Hill",24.75,dateformat.parse("13/10/1990"));
            books[2] = new Book("Concise Java","Stephen Prata","Academics",25.99,dateformat.parse("14/09/1990"));
            books[3] = new Book("Advanced Java","Samuel Wilson","Oasis",34.99,dateformat.parse("15/08/1990"));
            books[4] = new Book("Java for Dummies","Prof. Ivor Horton","Penguin",52.00,dateformat.parse("16/07/1990"));

        } catch (ParseException e) {
            e.printStackTrace();
        }
        System.out.println("Is shelf empty: "+shelf.isEmpty());
        shelf.addBook(books[0]);System.out.println(shelf);
        shelf.addBook(books[1]);System.out.println(shelf);
        shelf.addBook(books[2]);System.out.println(shelf);
        shelf.addBook(books[3]);System.out.println(shelf);
        shelf.addBook(books[4]);System.out.println(shelf);
        System.out.println("Is shelf full: "+shelf.isFull());
        shelf.removeBook(books[0]);
        shelf.removeBook(books[4]);
        System.out.println(shelf);
    }
}

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