Library Management System Project in Java

In this tutorial, we will build a simple Library Management System project using Core Java. This project demonstrates the basic functionalities such as adding books, displaying all the books, displaying book details, deleting books, and borrowing books. In this project, we use the in-memory object to store the book objects (we don't use a database).

Please note that this is a simple project, and a real-world library management system would involve more complex features and database integration.

1. Defining the Book Class 

Firstly, we'll define our core entity, the Book class, which represents individual books.

public class Book {
    private int isbn;
    private String title;
    private String author;

    public Book(int isbn, String title, String author) {
        this.isbn = isbn;
        this.title = title;
        this.author = author;
    }

    // Getters and setters
    public int getIsbn() {
        return isbn;
    }

    public void setIsbn(int isbn) {
        this.isbn = isbn;
    }

    public String getTitle() {
        return title;
    }

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

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    @Override
    public String toString() {
        return "ISBN: " + isbn + ", Title: " + title + ", Author: " + author;
    }
}

2. Implementing the LibraryManagementSystem Class 

With our Book class in place, we can now implement the core functionalities:

import java.util.ArrayList;
import java.util.List;

public class LibraryManagementSystem {

    private List<Book> books = new ArrayList<>();

    // Add a book
    public void addBook(Book book) {
        books.add(book);
    }

    // View all books
    public void viewBooks() {
        books.forEach(System.out::println);
    }

    // Update a book's details
    public void updateBook(int isbn, String newTitle, String newAuthor) {
        for (Book b : books) {
            if (b.getIsbn() == isbn) {
                b.setTitle(newTitle);
                b.setAuthor(newAuthor);
                break;
            }
        }
    }

    // Delete a book by ISBN
    public void deleteBook(int isbn) {
        books.removeIf(b -> b.getIsbn() == isbn);
    }

    // Search for a book by title
    public Book searchBookByTitle(String title) {
        for (Book b : books) {
            if (b.getTitle().equalsIgnoreCase(title)) {
                return b;
            }
        }
        return null;
    }
}

This class manages the collection of books. It allows adding, viewing, updating, deleting, and searching for books in the library.

3. Main Execution 

Let's put our system into action:

public class Main {
    public static void main(String[] args) {
        LibraryManagementSystem lms = new LibraryManagementSystem();

        // Add new books
        lms.addBook(new Book(1010, "Learn Java", "John Doe"));
        lms.addBook(new Book(1011, "Learn Advanced Java", "Jane Doe"));

        // Display all books
        System.out.println("Library Books:");
        lms.viewBooks();

        // Update the title of "Learn Advanced Java"
        lms.updateBook(1011, "Learn Java: Advanced Topics", "Jane Doe");

        // Search for a book by title
        System.out.println("\nSearching for 'Learn Java':");
        Book foundBook = lms.searchBookByTitle("Learn Java");
        System.out.println(foundBook != null ? foundBook : "Book not found.");

        // Delete the "Learn Java" book
        lms.deleteBook(1010);
        System.out.println("\nAfter deleting 'Learn Java':");
        lms.viewBooks();
    }
}

This class demonstrates the working of our Library Management System, from adding new books to searching and removing them.

Output:

Library Books:
ISBN: 1010, Title: Learn Java, Author: John Doe
ISBN: 1011, Title: Learn Advanced Java, Author: Jane Doe

Searching for 'Learn Java':
ISBN: 1010, Title: Learn Java, Author: John Doe

After deleting 'Learn Java':
ISBN: 1011, Title: Learn Java: Advanced Topics, Author: Jane Doe

This basic Library Management System provides an efficient way to manage books. As an enhancement, you might consider adding more advanced features such as borrowing and returning books, managing users, integrating with a database, or incorporating a user interface.

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