Code | Library Management System Project In Java With Source

public class TransactionService private Map<Integer, Integer> issuedBooks = new HashMap<>(); // bookId -> memberId

// Book operations public void addBook(String title, String author, String genre, int quantity) Book book = new Book(nextBookId++, title, author, genre, quantity); books.add(book); System.out.println("Book added successfully! ID: " + book.getId());

book.setQuantity(book.getQuantity() - 1); issuedBooks.put(bookId, memberId); System.out.println("Book issued successfully to " + member.getName()); Library Management System Project In Java With Source Code

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@Override public String toString() " + email + " package service; import model.Book; import model.Member; import java.util.ArrayList; import java.util.List; import java.util.stream.Collectors; int quantity) this.id = id

public void showIssuedBooks() if (issuedBooks.isEmpty()) System.out.println("No books currently issued."); return; System.out.println("\nIssued Books (Book ID -> Member ID):"); for (Map.Entry<Integer, Integer> entry : issuedBooks.entrySet()) Book b = libraryService.findBookById(entry.getKey()); Member m = libraryService.findMemberById(entry.getValue()); System.out.println("Book: " + (b != null ? b.getTitle() : "Unknown") + "

public Book(int id, String title, String author, String genre, int quantity) this.id = id; this.title = title; this.author = author; this.genre = genre; this.quantity = quantity; this.title = title

public TransactionService(LibraryService libraryService) this.libraryService = libraryService;

Book book = libraryService.findBookById(bookId); if (book != null) book.setQuantity(book.getQuantity() + 1); issuedBooks.remove(bookId); System.out.println("Book returned successfully.");

@Override public String toString() " + author + " package model; public class Member private int memberId; private String name; private String email; private String phone;