Main.java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        LibaryManagementService l = new LibaryManagementService();
        System.out.println("***************** Welcome to Libary Management System *****************");

        int choise;
        try {
            do {

                System.out.println("1. Add Book\n2.Display Book\n3.Remove Book\n4.Exit");
                System.out.println("Enter Your Choise: ");
                choise = sc.nextInt();

                switch (choise) {

                    case 1:
                        l.addBook();
                        break;
                    case 2:
                        l.displayBook();
                        break;
                    case 3:
                        l.removeBook();
                        break;
                    case 4:
                        l.exit();
                        break;
                    default:
                        System.out.println("Enter valid choise..!");
                }

            } while (choise != 4);
        } catch (Exception e) {
            System.out.println("Something went wrong..!");
        }

    }

}