多线程加强

Holy灬loong

于 2017-09-18 21:56:27 发布

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分类专栏：多线程文章标签：多线程

本文链接：https://blog.youkuaiyun.com/qq_38431927/article/details/78024276

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public class TicketWin implements Runnable{
    private String name=null;

    //基本数据类型变量不能当对象锁，我们可以造一个与它平行的对象来代替它当锁
    private static int num=200;
    private static Object obj=new Object();

    public TicketWin(String name) {
        this.name=name;
    }

    @Override
    public void run() {
        synchronized ( obj ) { //对象锁 ----注意，这里不能用this因为是静态的
            while (true) {
                if (num == 0) {
                    break;
                }
                System.out.println(num--);
            }
        }
    }

}

public class SaleTicket {
    public static void main(String[] args) {
        Thread t1 = new Thread( new TicketWin("窗口1") );
        Thread t2 = new Thread( new TicketWin("窗口2") );
        Thread t3 = new Thread( new TicketWin("窗口3") );
        Thread t4 = new Thread( new TicketWin("窗口4") );

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

    }
}