Threadクラスを継承してJavaスレッドを実装する

package demo1;

public class SellTickets extends Thread {
    //共享数据
    static int count = 100;
    @Override
    public void run() {
        //循环售票
        while(count > 0) {
            count--;
            System.out.println(Thread.currentThread().getName() + "售出了一张票，剩余" + count);
        }
    }
}

import demo1.SellTickets;

public class TheadDemo {

    public  static void main(String[] args) {
        //模拟四个售票员售票
        SellTickets s1 = new SellTickets();
        SellTickets s2 = new SellTickets();
        SellTickets s3 = new SellTickets();
       // System.out.println(s1.currentThread().getName());  //这个线程的名称是main
        s1.start();
        s2.start();
        s3.start();

    }
}