Question

To be done in Java

Consider the partially complete book class given.    Make the following additions to the book class.

• Add a getAuthor() and a getTitle() method to the book class. They should take no parameters and should return a String.
• Change the 3-parameter constructor for the class so that it correctly initializes the member variables.
• Write an accessor method called getPages().
• Add a zero parameter getDetails() method to the Book class. It should assemble the information for a book as a single string that is returned by the method. Format the string that is returned exactly as follows, with no leading or trailing spaces or hard returns, where the words inside the brackets represent the data from the object. Do not include the square brackets in the string.
• [title] by [author]([pages]pp)

/**

* A class that maintains information on a book.

* This might form part of a larger application such

* as a library system, for instance.

* @author (Insert your name here.)

* @version (Insert today's date here.)

*/

public class Book

{

    // The fields.

    private String author;

    private String title;

    private int pages;

    /**

    * Zero parameter constructor calls the 3-parameter constructor with default values

    * when this object is constructed

    */

    public Book()

    {

        this("n/a", "n/a",0);

    }

    /**

     * Set the author and title fields when this object

     * is constructed.

     */

    public Book(String bookAuthor, String bookTitle, int numPages)

    {

        author = bookAuthor;

        title = bookTitle;

    }

}

Answer 1

Explanation:I have added the code as mentioned and have provided a Demo class and have also shown the output by using the main method, please find the image attached with the answer.Please upvote if you liked my answer and comment if you need any modification or explanation.

//code

/**
*
* A class that maintains information on a book.
*
* This might form part of a larger application such
*
* as a library system, for instance.
*
* @author (Insert your name here.)
*
* @version (Insert today's date here.)
*
*/
public class Book
{

   // The fields.

   private String author;
   private String title;
   private int pages;

   /**
   *
   * Zero parameter constructor calls the 3-parameter constructor with default
   * values
   *
   * when this object is constructed
   *
   */
   public Book()
   {
       this("n/a", "n/a", 0);
   }

   /**
   *
   * Set the author and title fields when this object
   *
   * is constructed.
   *
   */
   public Book(String bookAuthor, String bookTitle, int numPages)
   {
       author = bookAuthor;
       title = bookTitle;
       pages = numPages;
   }

   /**
   * accessor method that returns the author of the book
   *
   */
   public String getAuthor()
   {
       return author;
   }

   /**
   * accessor method that returns the title of the book
   *
   */
   public String getTitle()
   {
       return title;
   }

   /**
   * accessor method that returns the number of pages of the book
   *
   */
   public int getPages()
   {
       return pages;
   }

   /**
   * returns the details of book
   *
   */
   public String getDetails()
   {
       return title + " by " + author + "(" + pages + "pp)";
   }
}

//Demo class

public class Demo
{

   public static void main(String[] args) throws InterruptedException
   {
       Book book = new Book("Mr.Roy", "Title of book", 400);
       System.out.println(book.getDetails());
   }
}

Output: