卖票程序--静态变量

class Ticket extends Thread {

    private static int tick = 100;

    public void run() {
        while (true) {
            if (tick > 0)
                System.out.println(currentThread().getName() + "sale: "
                        + tick--);
        }
    }
}

public class TicketDemo {

    public static void main(String[] args) {

        Ticket t1 = new Ticket();
        Ticket t2 = new Ticket();
        Ticket t3 = new Ticket();
        Ticket t4 = new Ticket();

        t1.start();
        t2.start();
        t3.start();
        t4.start();
    }
}