third program

Author: latenightcoder-git

BookManager.java

@@ -0,0 +1,91 @@
+import javax.swing.*;
+
+class Book {
+    private String title;
+    private String author;
+    private String isbn;
+
+    public Book(String title, String author, String isbn) {
+        this.title = title;
+        this.author = author;
+        this.isbn = isbn;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public String getIsbn() {
+        return isbn;
+    }
+
+    @Override
+    public String toString() {
+        return "Book [Title: " + title + ", Author: " + author + ", ISBN: " + isbn + "]";
+    }
+}
+
+public class BookManager {
+    public static void main(String[] args) {
+        Book[] books = new Book[100]; // Fixed array for storing books
+        int bookCount = 0; // Track the number of books added
+        String menu = "1. Add Book\n2. Remove Book\n3. View All Books\n4. Exit";
+
+        while (true) {
+            String choice = JOptionPane.showInputDialog(menu);
+            switch (choice) {
+                case "1": // Add Book
+                    if (bookCount >= books.length) {
+                        JOptionPane.showMessageDialog(null, "Library is full! Cannot add more books.");
+                        break;
+                    }
+                    String title = JOptionPane.showInputDialog("Enter Book Title:");
+                    String author = JOptionPane.showInputDialog("Enter Book Author:");
+                    String isbn = JOptionPane.showInputDialog("Enter Book ISBN:");
+                    books[bookCount++] = new Book(title, author, isbn);
+                    JOptionPane.showMessageDialog(null, "Book added successfully!");
+                    break;
+
+                case "2": // Remove Book
+                    String isbnToRemove = JOptionPane.showInputDialog("Enter ISBN of the Book to Remove:");
+                    boolean found = false;
+                    for (int i = 0; i < bookCount; i++) {
+                        if (books[i] != null && books[i].getIsbn().equals(isbnToRemove)) {
+                            books[i] = null; // Mark the book as null
+                            found = true;
+                            break;
+                        }
+                    }
+                    if (found) {
+                        JOptionPane.showMessageDialog(null, "Book removed successfully!");
+                    } else {
+                        JOptionPane.showMessageDialog(null, "Book not found!");
+                    }
+                    break;
+
+                case "3": // View All Books
+                    String allBooks = "Books in Library:\n";
+                    boolean hasBooks = false;
+                    for (int i = 0; i < bookCount; i++) {
+                        if (books[i] != null) {
+                            allBooks += books[i].toString() + "\n"; // Concatenate book details
+                            hasBooks = true;
+                        }
+                    }
+                    JOptionPane.showMessageDialog(null, hasBooks ? allBooks : "No books in library.");
+                    break;
+
+                case "4": // Exit
+                    System.exit(0);
+                    break;
+
+                default:
+                    JOptionPane.showMessageDialog(null, "Invalid choice! Try again.");
+            }
+        }
+    }
+}