QN034. Write a class to accept and print book information using default constructor.

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1. Objective

To create a class to accept and print book information using default constructor.

2. Theory

In Java, a constructor is a block of codes similar to the method. It is called when an instance of the class is created. At the time of calling constructor, memory for the object is allocated in the memory.
It is a special type of method which is used to initialize the object.
Every time an object is created using the new keyword, at least one constructor is called.
It calls a default constructor if there is no constructor available in the class. In such case, Java compiler provides a default constructor by default.

3. Source Code

import java.util.Scanner;
public class Qn034{
Scanner input = new Scanner(System.in);
String bookName, authorName;
int bookPrice, numberOfPages;

Qn034(){
System.out.print("Enter book name: ");
bookName = input.nextLine();

System.out.print("Enter author name: ");
authorName = input.nextLine();

System.out.print("Enter book price: ");
bookPrice = input.nextInt();

System.out.print("Enter total number of pages in book: ");
numberOfPages = input.nextInt();

System.out.println("\nBook information");
System.out.println("Book Name: " + bookName);
System.out.println("Author: " + authorName);
System.out.println("Price: " + bookPrice);
System.out.println("Total no. of pages: " + numberOfPages);
}
public static void main(String[] args){
Qn034 qnObj = new Qn034();
}
}


4. Output

Enter book name: Java
Enter author name: Paul Deitel
Enter book price: 1500
Enter totol number of pages in book: 500

Book Information
Book Name: Java
Author: Paul Deitel
Price: Rs 1500
Total no. of pages: 500

5. Conclusion

In this way, I would like to conclude that by creating default constructor we can accept and display the book information.