线程同步小例子:电影院订票

package com.whut.study.syn;

import java.util.ArrayList;
import java.util.List;

public class HappyCinema2 {

	public static void main(String[] args) {
		//可用位置
		List available =new ArrayList();
		available.add(1);
		available.add(2);
		available.add(3);
		available.add(6);
		available.add(7);
		
		//顾客需要的位置
		List seats1 =new ArrayList();
		seats1.add(1);
		seats1.add(2);
		List seats2 =new ArrayList();
		seats2.add(3);
		seats2.add(6);
		
		
		SxtCinema c = new SxtCinema(available,"happy sxt");
		new Thread(new HappyCustomer(c,seats1),"老高").start();
		new Thread(new HappyCustomer(c,seats2),"老裴").start();
	}

}
//顾客
class HappyCustomer implements Runnable{
	SxtCinema cinema;
	List seats;	
	public HappyCustomer(SxtCinema cinema, List seats) {
		this.cinema = cinema;
		this.seats = seats;
	}

	@Override
	public void run() {
		synchronized(cinema) {
			boolean flag = cinema.bookTickets(seats);
			if(flag) {
				System.out.println("出票成功"+Thread.currentThread().getName()+"-<位置为:"+seats);
			}else {
				System.out.println("出票失败"+Thread.currentThread().getName()+"-<位置不够");			
			}
		}
	}
	
}

//影院
class SxtCinema{
	List available; //可用的位置
	String name; //名称
	public SxtCinema(List available, String name) {
		this.available = available;
		this.name = name;
	}
	
	//购票
	public boolean bookTickets(List seats) {
		System.out.println("欢迎光临"+this.name+"，当前可用位置为:"+available);
		List copy = new ArrayList();
		copy.addAll(available);
		
		//相减
		copy.removeAll(seats);
		//判断大小
		if(available.size()-copy.size() !=seats.size()) {
			return false;
		}
		//成功
		available = copy;
		return true;
	}
}