The Movies DB: A Java class serving our favourite movies

Figure 1. This class is the helper for our examples. It is a simple read-only Java DB for our favourite Movies. Feel free to add your personal favourites!
package pods.podloaders;

  import java.util.Collection;
  import java.util.TreeMap;

  /** Simple read-only Java DB for a movie collection */
  public class MoviesDB {

    private TreeMap<Integer, Movie> allMovies;

    /** Constructor */
    public MoviesDB() {

      allMovies = new TreeMap<Integer, Movie>();
      allMovies.put(1, new MoviesDB.Movie(1,"The Dark Knight", "action",
        2008, "Christopher Nolan", "Christian Bale", 1));
      allMovies.put(2, new MoviesDB.Movie(2,"Casablanca", "romance",
        1942, "Michael Curtiz", "Humphrey Bogart", 3));
      allMovies.put(3, new MoviesDB.Movie(3,"Schindler's List", "drama",
        1993, "Steven Spielberg", "Liam Neeson", 7));
      allMovies.put(4, new MoviesDB.Movie(4,"Alien", "horror",
        1979, "Ridley Scott", "Sigourney Weaver", 1));
      allMovies.put(5, new MoviesDB.Movie(1, "The GodFather, Part II",
        "drama", 1974, "Francis Ford Coppola", "Marlon Brando", 6));
      allMovies.put(5, new MoviesDB.Movie(1, "Toy Story 3",
       "comedy", 2010, "Lee Unkrich", "Tom Hanks", 2));
      allMovies.put(6, new MoviesDB.Movie(6, "Toy Story 2",
          "comedy", 1999, "John Lasseter", "Tom Hanks", 0));

    }

    /** Return all movies as a Collection */
    public Collection<MoviesDB.Movie> getAllMovies(){
      Collection<MoviesDB.Movie> movieCollection =
        this.allMovies.values();
      return movieCollection;
    }
    /** Return a movie by its Id */
    public Movie getMovieById(Integer id) {
      return allMovies.get(id);
    }

    class Movie {

      public int id,year,oscars;
      public String title, genre, director, leadrole, url;

      public Movie(int id,String title,String genre,
        int year,String director,String leadrole, int oscars){
       this.id = id;
       this.title = title;
       this.genre = genre;
       this.year = year;
       this.director = director;
       this.leadrole = leadrole;
       this.oscars = oscars;

      }
    }
  }