Java多线程学习——例子：模拟电影院抢座位

Cinema——List<Integer>数据结构存储电影院座位

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;
            }
        }
    }
}

CinemaCustomer

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);
        }
    }
}

GrabbingTickets

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();
    }
}

很简单的一个例子，但是体会到了线程同步，也学会使用容器的一些常用方法。