class?SellThread?implements?Runnable{
	int?tickets?=?100;
	
	public?synchronized?void?sell（）{
		if（tickets?>?0）{
		/*
			try{
				Thread.sleep（10）;
			}catch（Exception?e）{
				e.printStackTrace（）;
			}
		*/
		System.out.println（Thread.currentThread（）.getName（）+“?has?selled?tickets:“+tickets）;
		tickets--;