Lora Java HW

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

class Library{

    class Books{

        public HashMap<String, Boolean> books = new HashMap<>(){{
            put("book one", false);
            put("book two", false);
        }};


        public Books(){
        }

        public void DisplayBooks(){
            Iterator<Map.Entry<String, Boolean>> iterator = books.entrySet().iterator();
         while (iterator.hasNext()) {
        Map.Entry<String, Boolean> entry = iterator.next();
        System.out.println(entry.getKey() + ":" + entry.getValue());
        }
        }
    }

    abstract class User{
        protected HashMap<String, Boolean> books = new HashMap<>();
        abstract void doAction(String book);
    }

    class RentingUser extends User{
        public
        RentingUser(Books obj){
            this.books = obj.books;
        }

        void doAction(String book){
            if(books.containsKey(book)){
                if(books.get(book) == true){
                    System.out.println("User is returning the book");
                    books.replace(book, false);
                } else {
                    System.out.println("User is renting the book");
                    books.replace(book, true);
                }
            }
        }

     }

    class AdminUser extends User{
        public
        AdminUser(Books obj){
            this.books = obj.books;
        }

        void doAction(String book){
            if(books.containsKey(book)){
                books.remove(book);
                System.out.println("User removed the book");
            } else {
                System.out.println("The book was not in the list");
            }
        }
    }
    public static void main(String[] args){
        Library lib = new Library();
        Books obj = lib.new Books();
        AdminUser admin = lib.new AdminUser(obj);
        RentingUser rentingUser = lib.new RentingUser(obj);
        rentingUser.doAction("book one");
        admin.doAction("book two");
        obj.DisplayBooks();

    }
}