@NodeEntity
public class Actor {

	@Id @GeneratedValue
	private Long id;
	private String name;

	@Relationship(type = "ACTS_IN", direction = Relationship.OUTGOING)
	private Set<Movie> movies = new HashSet<>();

	public Actor() {
	}

	public Actor(String name) {
		this.name = name;
	}

	public void actsIn(Movie movie) {
		movies.add(movie);
		movie.getActors().add(this);
	}
}

@NodeEntity
public class Movie {

	@Id @GeneratedValue
	private Long id;
	private String title;
	private int released;

	public Movie() {
	}

	public Movie(String title, int year) {
		this.title = title;
		this.released = year;
	}

}

//Set up the Session
SessionFactory sessionFactory = new SessionFactory(configuration, "movies.domain");
Session session = sessionFactory.openSession();

Movie movie = new Movie("The Matrix", 1999);

Actor keanu = new Actor("Keanu Reeves");
keanu.actsIn(movie);

Actor carrie = new Actor("Carrie-Ann Moss");
carrie.actsIn(movie);

//Persist the movie. This persists the actors as well.
session.save(movie);

//Load a movie
Movie matrix = session.load(Movie.class, movie.getId());
for(Actor actor : matrix.getActors()) {
    System.out.println("Actor: " + actor.getName());
}