Maxx

Layout.puml

@@ -0,0 +1,52 @@
+@startuml
+
+class Book {
+  - id : int
+  - title : String
+  - author : String
+  - isAvailable : boolean
+  + Book(id : int, title : String, author : String)
+  + getId() : int
+  + setId(id : int) : void
+  + getTitle() : String
+  + setTitle(title : String) : void
+  + getAuthor() : String
+  + setAuthor(author : String) : void
+  + isAvailable() : boolean
+  + setAvailable(available : boolean) : void
+  + toString() : String
+}
+
+class Library {
+  - books : ArrayList<Book>
+  - nextBookId : int
+  + Library()
+  + addBook(title : String, author : String) : void
+  + displayAllBooks() : void
+  + displayAvailableBooks() : void
+  + displayBorrowedBooks() : void
+  + borrowBookById(id : int) : void
+  + returnBookById(id : int) : void
+  + searchBookById(id : int) : void
+  + searchBookByTitle(title : String) : void
+  - findBookById(id : int) : Book
+}
+
+class Main {
+  + main(args : String[]) : void
+  + startApplication(scanner : Scanner, library : Library) : void
+  + printMenu() : void
+  + getValidatedMenuChoice(scanner : Scanner) : int
+  + addStarterBooks(library : Library) : void
+  + addBook(scanner : Scanner, library : Library) : void
+  + borrowBook(scanner : Scanner, library : Library) : void
+  + returnBook(scanner : Scanner, library : Library) : void
+  + searchBook(scanner : Scanner, library : Library) : void
+  + getValidatedSearchChoice(scanner : Scanner) : int
+  + getValidatedPositiveNumber(scanner : Scanner) : int
+}
+
+Library "1" --> "*" Book : manages
+Main --> Library : uses
+
+@enduml

src/main/java/LibraryBookTracker/Book.java

@@ -0,0 +1,71 @@
+package LibraryBookTracker;
+
+public class Book {
+
+
+        // Private fields
+        private String title;
+        private String author;
+        private boolean isAvailable;
+        private int id;
+
+        // Constructor
+        public Book(int id, String title, String author) {
+            this.title = title;
+            this.author = author;
+            this.isAvailable = true; // default value
+            this.id = id;
+        }
+
+
+        // Getter for title
+    public int getId() {
+        return id;
+    }
+
+    public String getTitle() {
+            return title;
+        }
+
+        // Setter for title
+        public void setTitle(String title) {
+            this.title = title;
+        }
+
+        // Getter for author
+        public String getAuthor() {
+            return author;
+        }
+
+        // Setter for author
+        public void setAuthor(String author) {
+            this.author = author;
+        }
+
+        // Check availability
+        public boolean isAvailable() {
+            return isAvailable;
+        }
+
+        // Set availability
+        public void setAvailable(boolean available) {
+            this.isAvailable = available;
+        }
+
+        // toString method
+
+    @Override
+    public String toString() {
+        String status;
+
+        if (isAvailable) {
+            status = "Available";
+        } else {
+            status = "Borrowed";
+        }
+
+        return "ID: " + id + " | Title: " + title + " | Author: " + author + " | Status: " + status;
+
+        }
+    }
+

src/main/java/LibraryBookTracker/Library.java

@@ -0,0 +1,152 @@
+package LibraryBookTracker;
+
+import java.util.ArrayList;
+
+public class Library {
+
+    // Using ArrayList because the number of books can grow as users add more
+    private ArrayList<Book> books;
+
+    // This keeps track of the next ID to assign to a new book
+    private int nextBookId;
+
+    // Constructor creates the book list and starts IDs at 1
+    public Library() {
+        books = new ArrayList<>();
+        nextBookId = 1;
+    }
+
+    // Creates and adds a new book using the next available ID
+    public void addBook(String title, String author) {
+        Book newBook = new Book(nextBookId, title, author);
+        books.add(newBook);
+        nextBookId++;
+
+        System.out.println("Book added successfully.");
+        System.out.println(newBook);
+    }
+
+    // Displays every book in the system
+    public void displayAllBooks() {
+        if (books.isEmpty()) {
+            System.out.println("No books in the library.");
+            return;
+        }
+
+        System.out.println("\n--- All Books ---");
+        for (Book book : books) {
+            System.out.println(book);
+        }
+    }
+
+    // Displays only books that are currently available
+    public void displayAvailableBooks() {
+        boolean foundAvailable = false;
+
+        System.out.println("\n--- Available Books ---");
+        for (Book book : books) {
+            if (book.isAvailable()) {
+                System.out.println(book);
+                foundAvailable = true;
+            }
+        }
+
+        if (!foundAvailable) {
+            System.out.println("No available books right now.");
+        }
+    }
+
+    // Displays only books that are currently borrowed
+    public void displayBorrowedBooks() {
+        boolean foundBorrowed = false;
+
+        System.out.println("\n--- Borrowed Books ---");
+        for (Book book : books) {
+            if (!book.isAvailable()) {
+                System.out.println(book);
+                foundBorrowed = true;
+            }
+        }
+
+        if (!foundBorrowed) {
+            System.out.println("No borrowed books right now.");
+        }
+    }
+
+    // Lets the user borrow a book using its unique ID
+    public void borrowBookById(int id) {
+        Book book = findBookById(id);
+
+        if (book == null) {
+            System.out.println("Book not found.");
+            return;
+        }
+
+        if (!book.isAvailable()) {
+            System.out.println("That book is already borrowed.");
+            return;
+        }
+
+        book.setAvailable(false);
+        System.out.println("You borrowed: " + book.getTitle());
+    }
+
+    // Lets the user return a book using its unique ID
+    public void returnBookById(int id) {
+        Book book = findBookById(id);
+
+        if (book == null) {
+            System.out.println("Book not found.");
+            return;
+        }
+
+        if (book.isAvailable()) {
+            System.out.println("That book is already available.");
+            return;
+        }
+
+        book.setAvailable(true);
+        System.out.println("You returned: " + book.getTitle());
+    }
+
+    // Searches for a book by ID
+    public void searchBookById(int id) {
+        Book book = findBookById(id);
+
+        if (book == null) {
+            System.out.println("Book not found.");
+        } else {
+            System.out.println("Book found:");
+            System.out.println(book);
+        }
+    }
+
+    // Searches for books by title
+    // Using contains() makes searching more flexible than exact matching
+    public void searchBookByTitle(String title) {
+        boolean found = false;
+
+        System.out.println("\n--- Search Results ---");
+        for (Book book : books) {
+            if (book.getTitle().toLowerCase().contains(title.toLowerCase())) {
+                System.out.println(book);
+                found = true;
+            }
+        }
+
+        if (!found) {
+            System.out.println("No books matched that title.");
+        }
+    }
+
+    // Helper method used to find one book by its unique ID
+    // Keeping this logic in one place avoids repeated code
+    private Book findBookById(int id) {
+        for (Book book : books) {
+            if (book.getId() == id) {
+                return book;
+            }
+        }
+        return null;
+    }
+}