public class Cinema{

    private List<Integer> seats;  //剩余座位

    public Cinema(List<Integer> seats) {

        this.seats = seats;

    }

    public boolean seatGrabbing(List<Integer> needTickets){

        if(needTickets.size()>seats.size()){

            return false;

        }

        synchronized (this) {

            if(needTickets.size()>seats.size()){

                return false;

            }

            try {

                Thread.sleep(200);

            } catch (InterruptedException e) {

                e.printStackTrace();

            }

            System.out.println("剩余座位:" + seats);

            List<Integer> tmpSeats=new ArrayList<Integer>();

            tmpSeats.addAll(seats);

            tmpSeats.removeAll(needTickets);

            if(seats.size()-tmpSeats.size()==needTickets.size()){

                seats=tmpSeats;

                return true;

            }else {

                return false;

            }

        }

    }

}

public class CinemaCustomer implements Runnable {

    private List<Integer> needTickets;    //需要的票

    private Cinema cinema;

    private boolean isGetTickets=false;

    public CinemaCustomer(List<Integer> needTickets, Cinema cinema) {

        this.needTickets = needTickets;

        this.cinema = cinema;

    }

    @Override

    public void run() {

        isGetTickets=cinema.seatGrabbing(needTickets);

        if(isGetTickets){

            System.out.println(Thread.currentThread().getName()+"抢票成功"+needTickets);

        }else{

            System.out.println("抢票失败"+needTickets);

        }

    }

}

public class GrabbingTickets {

    public static void main(String[] args) {

        List<Integer> seats=new ArrayList<Integer>();   //总座位

        seats.add(1);

        seats.add(2);

        seats.add(3);

        seats.add(4);

        seats.add(5);

        Cinema cinema=new Cinema(seats);

        List<Integer> seat1=new ArrayList<Integer>();

        seat1.add(1);

        seat1.add(2);

        List<Integer> seat2=new ArrayList<Integer>();

        seat2.add(5);

        seat2.add(4);

        new Thread(new CinemaCustomer(seat1,cinema),"Tom").start();

        new Thread(new CinemaCustomer(seat2,cinema),"Job").start();

    }

}