Question

A bookseller maintains record of books belonging to the various publishers. He uses a class with the specifications given below:

Class name: Stock
Data members/Instance variables
                        String title: Contains title of the book.
                        String author: Contains author name.
                        String pub: Contains publisher's name.
                        int noc: Number of copies.
Member Methods:
void getdata(): to accept title, author, publisher's name and the number of copies.
void purchase(int t, String a, String p, int n): to check the existence of the book in the stock by comparing total, author's and publisher's name. Also check whether noc >nor not.
If yes, maintain the balance as noc-n, otherwise display book is not available or stock is under flowing.

Write a program to perform the task given above. 

Answer 1

import java.util.*;
public class Stock
{String title, author, pub;
int noc:

void getdata()
{Scanner sn = new Scanner(System.in);
System.out.println("****Input of Stock details****");
System.out.print("Title: ");
title = sn.nextLine();
System.out.print("Author: ");
author = sn.nextLine();
System.out.print("Publisher: ");
pub = sn.nextLine();
System.out.print("No.of copies in stock: ");
noc = sn.nextInt();
}

void purchase(String t, String a, String p, int n)
{int balance;
if (t.equalsIgnoreCase(title) && a.equalsignoreCase(author) && p.equalsignoreCase(pub) )
{ if (n <= noc) 
{ balance = noc - n;
System.out.print("Balance (copies) in Stock after this purchase: " + balance);
}
else
System.out.println("Book not available / stock is under flowing");
}}

public static void main(String j[])
{Scanner sn = new Scanner(System.in);
Stock obj = new Stock();
String t1, a1, p1;
int n1;
obj.getdata(); // method call
System.out.println("\n***Purchase***");
System.out.print("Title: ");
t1 = sn.nextLine();
System.out.print("Author: ");
a1 = sn.nextLine();
System.out.print("Publisher: ");
p1 = sn.nextLine();
System.out.print("No.of Copies required: ");
n1 = sn.nextInt();
obj.purchase(t1, a1, p1, n1); // method call
}}