import java.util.*;
import java.lang.*;
import java.io.*;
 
class Ideone {
	public static void main (String[] args)
	{
		List<Book> books = Arrays.asList(
			new Book("Lord of the Rings"),
			new Book("Harry Potter")
		);
 
		books.sort(Comparator.comparing(Book::getTitle));
 
		for (Book book : books) {
			System.out.println(book.getTitle());
		}
	}
}
 
class Book {
	private final String title;
 
	Book(String title) {
		this.title = title;
	}
 
	String getTitle() { return title; }
}

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