Java电影购票系统

以下是Java电影购票系统的设计和实现：

1. 首先，我们需要定义一个Movie类，该类包含电影的名称，导演，演员，类型和时长等属性。

public class Movie {
    private String name;
    private String director;
    private String[] actors;
    private String type;
    private int duration;

    public Movie(String name, String director, String[] actors, String type, int duration) {
        this.name = name;
        this.director = director;
        this.actors = actors;
        this.type = type;
        this.duration = duration;
    }

    // getter and setter methods
}

2. 接下来，我们需要定义一个Cinema类，该类包含电影院的名称，地址和座位等属性，以及一个Movie类型的数组，表示该电影院正在上映的电影。

public class Cinema {
    private String name;
    private String address;
    private int seats;
    private Movie[] movies;

    public Cinema(String name, String address, int seats, Movie[] movies) {
        this.name = name;
        this.address = address;
        this.seats = seats;
        this.movies = movies;
    }

    // getter and setter methods
}

3. 然后，我们需要定义一个Ticket类，该类包含电影票的价格，座位号和电影等属性。

public class Ticket {
    private double price;
    private int seatNumber;
    private Movie movie;

    public Ticket(double price, int seatNumber, Movie movie) {
        this.price = price;
        this.seatNumber = seatNumber;
        this.movie = movie;
    }

    // getter and setter methods
}

4. 最后，我们需要定义一个TicketBookingSystem类，该类包含一个Cinema类型的数组，表示所有的电影院，以及一个Ticket类型的数组，表示所有已售出的电影票。

public class TicketBookingSystem {
    private Cinema[] cinemas;
    private Ticket[] tickets;

    public TicketBookingSystem(Cinema[] cinemas) {
        this.cinemas = cinemas;
        this.tickets = new Ticket[0];
    }

    // method to book a ticket
    public void bookTicket(int cinemaIndex, int movieIndex, int seatNumber) {
        Cinema cinema = cinemas[cinemaIndex];
        Movie movie = cinema.getMovies()[movieIndex];
        double price = calculatePrice(movie.getDuration());
        Ticket ticket = new Ticket(price, seatNumber, movie);
        tickets = Arrays.copyOf(tickets, tickets.length + 1);
        tickets[tickets.length - 1] = ticket;
    }

    // method to calculate ticket price based on movie duration
    private double calculatePrice(int duration) {
        if (duration <= 60) {
            return 8.0;
        } else if (duration <= 120) {
            return 12.0;
        } else {
            return 15.0;
        }
    }

    // getter and setter methods
}

以上就是Java电影购票系统的设计和实现。用户可以通过调用TicketBookingSystem类的bookTicket方法来购买电影票。系统会根据电影的时长自动计算票价，并将售出的电影票保存在tickets数组中。