Java Program to create a user defined LinkedList class and store list of books and display

Program

import java.util.*;
class Book
{
	String bname;
	String author;
	int price;
	Book(String bname, String author, int price)
	{
		this.bname = bname;
		this.author = author;
		this.price = price;
	}
	public String toString()
	{
		String s = "Name = " + this.bname + "\tAuthor = " + this.author + "\tPrice = " + this.price;
		return s;
	}
}
public class BookListDemo
{
	public static void main(String[] args)
	{
		LinkedList ll = new LinkedList();
		ll.add(new Book("Java", "Herbert", 200));
		ll.add(new Book("C", "Dennis", 150));
		ll.add(new Book("C++", "Schildt", 350));
		ll.add(new Book("Operating Systems", "Galvin", 500));
		ListIterator litr;
		System.out.println("********* Book Details **********");
		for( litr = ll.listIterator(); litr.hasNext();)
			System.out.println(litr.next() + "\t");
	}
}

This Java program demonstrates creating a user-defined LinkedList class to store a list of books and display their details. It uses the Book class to represent book objects, and the LinkedList class from Java's java.util package to manage the collection of books.

1. Book Class:

   • The Book class represents the details of a book. It contains three attributes:
     • bname: The name of the book.
     • author: The author of the book.
     • price: The price of the book.
   • Represents book data with fields for name, author, and price.
   • The overridden toString() method provides a clear, readable output for the Book objects.
   • The constructor initializes these attributes.
   • The toString() method is overridden to provide a formatted string representation of the book object.

2. BookListDemo Class:

   • The main method demonstrates the functionality.
   • A LinkedList is created to store the Book objects.
   • Java's LinkedList is used to manage the list of books.
   • This dynamic data structure allows efficient insertion and iteration of elements.

3. Adding Books:

   • Several Book objects are created and added to the LinkedList using the add() method.

4. Displaying the Books:

   • A ListIterator is used to iterate through the LinkedList and display the details of each book using the toString() method.
   • The hasNext() method checks if there are more elements in the list, and next() retrieves the next element.

Output

********* Book Details **********
Name = Java	Author = Herbert	Price = 200	
Name = C	Author = Dennis	Price = 150	
Name = C++	Author = Schildt	Price = 350	
Name = Operating Systems	Author = Galvin	Price = 500