public abstract class Movie {
    private String title;
    private int year;
    private double rating;
    private String genre;

    public Movie() {}

    public Movie(String title, int year, double rating, String genre) {
        this.title = title;
        this.year = year;
        this.rating = rating;
        this.genre = genre;
    }

    // 抽象方法：由不同类型的电影自己实现播放逻辑
    public abstract void play();

    // getter & setter
    public String getTitle() { return title; }
    public void setTitle(String title) { this.title = title; }
    public int getYear() { return year; }
    public void setYear(int year) { this.year = year; }
    public double getRating() { return rating; }
    public void setRating(double rating) { this.rating = rating; }
    public String getGenre() { return genre; }
    public void setGenre(String genre) { this.genre = genre; }
}