Main.java

import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        Library library=new Library();

        while(true){
            System.out.println("\n=== Library Management System ===");
            System.out.println("1. Add Book");
            System.out.println("2. View Books");
            System.out.println("3. Search Book");
            System.out.println("4. Exit");
            System.out.print("Choice: ");
            int ch=sc.nextInt();
            sc.nextLine();

            switch(ch){
                case 1:
                    System.out.print("ID: ");
                    int id=sc.nextInt();
                    sc.nextLine();
                    System.out.print("Title: ");
                    String title=sc.nextLine();
                    System.out.print("Author: ");
                    String author=sc.nextLine();
                    library.addBook(new Book(id,title,author));
                    break;
                case 2:
                    library.viewBooks();
                    break;
                case 3:
                    System.out.print("Enter ID: ");
                    library.searchBook(sc.nextInt());
                    break;
                case 4:
                    System.out.println("Goodbye!");
                    return;
                default:
                    System.out.println("Invalid choice.");
            }
        }
    }
}