A publishing company that markets both book and audio-cassette in java. (Solution)

Q   Imagine a publishing company that markets both book and audio-cassette versions of its works. Create a class publication that stores the title and price of a publication. From this class derive two classes: 

a. Book, which adds a page count 

b. Tape, which adds a playing time in minutes. Each of these three classes should have set() and get() functions and a display() function to display its data. Write a main() program to test the book and tape class by creating instances of them, asking the user to fill in their data and then displaying the data with display().

Solution code

class Publication{

    int price;    String title;
    public Publication(int price, String title) {
        this.price = price;        this.title = title;    }

    public int getPrice() {
        return price;    }

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

    public String getTitle() {
        return title;    }

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


class Book extends Publication{
    int pageNo;    public Book(int price, String title,int pageNo) {
        super(price, title);        this.pageNo=pageNo;    }

    public void display() {
        System.out.println("Book detail \nTile ="+title+" \n price = "+price+" \n page no "+pageNo);    }
    public int getPageNo() {
        return pageNo;    }

    public void setPageNo(int pageNo) {
        this.pageNo = pageNo;    }
}
class Audio extends Publication {
    int time;
    public Audio(int price, String title,int time) {
        super(price, title);        this.time=time;    }

    public Audio(int price, String title) {
        super(price, title);    }

    public int getTime() {
        return time;    }

    public void setTime(int time) {
        this.time = time;    }

    public void display() {
        System.out.println("Audio \nTile ="+title+" \n price = "+price+" \n time "+time);    }
}


public class Main {

    public static void main(String[] args)
    {
        Audio a=new Audio(1200," mery moula",100);        Book b=new Book(1500," Allah ek hy",499);        a.display();        b.display();    }

}

OUTPUT