List<Book> bookList = new ArrayList<Book>();
Book book = new Book("Star Wars", "John Smith", 2010);
Book book1 = new Book("Star Wars1", "John Smith1", 2011);
Book book2 = new Book("Star Wars2", "John Smith2", 2012);
Book book3 = new Book("Star Wars3", "John Smith3", 2013);
Book book4 = new Book("Star Wars4", "John Smith4", 2014);
bookList.add(book);
bookList.add(book1);
bookList.add(book2);
bookList.add(book3);
bookList.add(book4);
List<LibraryUser> libraryUser = new ArrayList<>();
LibraryUser user = new LibraryUser("Greg", "Poland", "123456789");
libraryUser.add(user);
HashMap<LibraryUser, Book> bookUsers = new HashMap<>();
bookUsers.put(user, book);
bookUsers.put(user, book1);
bookUsers.put(user, book2);
bookUsers.put(user, book3);
bookUsers.put(user, book4);
Witam, chciałbym do user'a przypisać 5 obiektów (book, book1, book2, book3, book4). Tak, aby obiekt user posiadał 5 obiektów klasy Book czyli book. Stworzyłem HashMapę, ale nadpisuje mi book1 na book, book2 na book1 itd. Proszę o pomoc. Dziękuję