project files

Answers/java project/Admin.java

@@ -0,0 +1,12 @@
+public class Admin extends User {
+    private String password;
+
+    public Admin(String name, String phoneNumber, String password) {
+        super(name, phoneNumber);
+        this.password = password;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+}

Answers/java project/Book.java

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+public class Book {
+        private static int idCounter = 1;
+        private int bookID;
+        private String title;
+        private String author;
+        private boolean isAvailable;
+        private String description;
+
+        public Book(String title, String author, String description) {
+            this.bookID = idCounter++;
+            this.title = title;
+            this.author = author;
+            this.isAvailable = true;
+            this.description = description;
+        }
+
+        // Getters and Setters
+        public int getBookID() {
+            return bookID;
+        }
+
+        public String getTitle() {
+            return title;
+        }
+
+        public String getAuthor() {
+            return author;
+        }
+
+        public boolean isAvailable() {
+            return isAvailable;
+        }
+
+        public void setAvailable(boolean available) {
+            isAvailable = available;
+        }
+
+        public String getDescription() {
+            return description;
+        }
+    }
+

Answers/java project/CLI.java

@@ -0,0 +1,76 @@
+import java.util.List;
+import java.util.Scanner;
+
+public class CLI {
+    private static Library library = new Library("City Library", 1000, "9 AM - 5 PM");
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        while (true) {
+            System.out.print("Enter command: ");
+            String command = scanner.nextLine();
+            processCommand(command);
+        }
+    }
+
+    private static void processCommand(String command) {
+        String[] parts = command.split(" ");
+        switch (parts[0]) {
+            case "lib":
+                handleLibraryCommand(parts);
+                break;
+            default:
+                System.out.println("Unknown command");
+        }
+    }
+
+    private static void handleLibraryCommand(String[] parts) {
+        switch (parts[1]) {
+            case "add":
+                if (parts[2].equals("book")) {
+                    String title = parts[3];
+                    String author = parts[4];
+                    String description = parts[5];
+                    library.addBook(title, author, description);
+                    System.out.println("Book added successfully");
+                } else if (parts[2].equals("member")) {
+                    String name = parts[3];
+                    String phone = parts[4];
+                    String password = parts[5];
+                    library.addUser(new Admin(name, phone, password));
+                    System.out.println("Member added successfully");
+                }
+                break;
+            case "get":
+                if (parts[2].equals("hrs")) {
+                    System.out.println("Library operating hours: " + library.getOperatingHours());
+                } else if (parts[2].equals("available") && parts[3].equals("books")) {
+                    List< Book> availableBooks = library.getAvailableBooks();
+                    for (Book book : availableBooks) {
+                        System.out.println(book.getTitle() + " by " + book.getAuthor());
+                    }
+                }
+                break;
+            case "rent":
+                int bookID = Integer.parseInt(parts[2]);
+                int userID = Integer.parseInt(parts[3]);
+                library.rentBook(bookID, userID);
+                System.out.println("Book rented successfully");
+                break;
+            case "return":
+                bookID = Integer.parseInt(parts[2]);
+                library.returnBook(bookID);
+                System.out.println("Book returned successfully");
+                break;
+            case "remove":
+                if (parts[2].equals("member")) {
+                    userID = Integer.parseInt(parts[3]);
+                    library.removeUser(userID);
+                    System.out.println("Member removed successfully");
+                }
+                break;
+            default:
+                System.out.println("Unknown library command");
+        }
+    }
+}

Answers/java project/Library.java

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+import java.util.ArrayList;
+import java.util.List;
+
+public class Library {
+    private String name;
+    private int capacity;
+    private String operatingHours;
+    private List<Book> books;
+    private List<User> users;
+    private List<Rent> rentals;
+
+    public Library(String name, int capacity, String operatingHours) {
+        this.name = name;
+        this.capacity = capacity;
+        this.operatingHours = operatingHours;
+        this.books = new ArrayList<>();
+        this.users = new ArrayList<>();
+        this.rentals = new ArrayList<>();
+    }
+
+    // Method to add a book
+    public void addBook(String title, String author, String description) {
+        books.add(new Book(title, author, description));
+    }
+
+    public void addUser(User user) {
+        users.add(user);
+    }
+
+    public void removeUser(int userID) {
+        users.removeIf(user -> user.getUserID() == userID);
+    }
+
+    public void rentBook(int bookID, int userID) {
+        Book book = books.stream().filter(b -> b.getBookID() == bookID && b.isAvailable()).findFirst().orElse(null);
+        if (book != null) {
+            User user = users.stream().filter(u -> u.getUserID() == userID && u instanceof NormalUser).findFirst().orElse(null);
+            if (user != null) {
+                book.setAvailable(false);
+                rentals.add(new Rent(book, (NormalUser) user));
+            }
+        }
+    }
+
+
+    public void returnBook(int bookID) {
+        Rent rent = rentals.stream().filter(r -> r.getBook().getBookID() == bookID).findFirst().orElse(null);
+        if (rent != null) {
+            rent.getBook().setAvailable(true);
+            rentals.remove(rent);
+        }
+    }
+
+    public List<Book> getAvailableBooks() {
+        List<Book> availableBooks = new ArrayList<>();
+        for (Book book : books) {
+            if (book.isAvailable()) {
+                availableBooks.add(book);
+            }
+        }
+        return availableBooks;
+    }
+    public String getOperatingHours() {
+        return operatingHours;
+    }
+}

Answers/java project/MyApp.java

@@ -0,0 +1,5 @@
+public class MyApp {
+    public static void main(String[] args) {
+        CLI.main(args);
+    }
+}

Answers/java project/NormalUser.java

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+import java.util.Date;
+
+    public class NormalUser extends User {
+        private Date registrationDate;
+
+        public NormalUser(String name, String phoneNumber) {
+            super(name, phoneNumber);
+            this.registrationDate = new Date();
+        }
+
+        public Date getRegistrationDate() {
+            return registrationDate;
+        }
+    }
+

Answers/java project/Rent.java

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+import java.util.Date;
+
+public class Rent {
+    private static int idCounter = 1;
+    private int rentalID;
+    private Book book;
+    private NormalUser user;
+    private Date rentalDate;
+
+    public Rent(Book book, NormalUser user) {
+        this.rentalID = idCounter++;
+        this.book = book;
+        this.user = user;
+        this.rentalDate = new Date();
+    }
+
+    public int getRentalID() {
+        return rentalID;
+    }
+
+    public Book getBook() {
+        return book;
+    }
+
+    public NormalUser getUser() {
+        return user;
+    }
+
+    public Date getRentalDate() {
+        return rentalDate;
+    }
+}

Answers/java project/User.java

@@ -0,0 +1,26 @@
+public class User {
+        private static int idCounter = 1;
+        private int userID;
+        private String name;
+        private String phoneNumber;
+
+        public User(String name, String phoneNumber) {
+            this.userID = idCounter++;
+            this.name = name;
+            this.phoneNumber = phoneNumber;
+        }
+
+        // Getters and Setters
+        public int getUserID() {
+            return userID;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public String getPhoneNumber() {
+            return phoneNumber;
+        }
+    }
+