Java---多线程售票

package day;

public class Mytd implements Runnable {         //通过实现Runnable接口来实现多线程
    private int ticketcount = 100;
    Object ob = new Object();                  //加锁
    private int m = 100;

    public Mytd(int t) {                       //有参构造方法
        this.ticketcount = t;
        this.m = t;
    }

    public Mytd() {                           //无参构造方法

    }

    public void sellticket() {                //卖票方法
       synchronized (ob) {                    //同步线程锁
            if (ticketcount > 0) {
                ticketcount--;
                int num = this.m - ticketcount;
                System.out.println(Thread.currentThread().getName()
                        + "卖出第" + num + "张票，还剩" + ticketcount + "张票");
            } else {
                System.out.println("票已经卖完");
                return;
            }
       }
    }

    @Override
    public void run() {
        while (ticketcount > 0) {
            sellticket();
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

        }
    }
}

package day;

public class Work {
    public static void main(String[] args) {
        Mytd run = new Mytd(100);
        Thread th1 = new Thread(run,"东风路售票点");           //开启五个线程
        Thread th2 = new Thread(run,"吉祥路售票点");
        Thread th3 = new Thread(run,"从动路售票点");
        Thread th4 = new Thread(run,"文明路售票点");
        Thread th5 = new Thread(run,"好听路售票点");
        th1.start();
        th2.start();
        th3.start();
        th4.start();
        th5.start();
    }
}