锁定线程:同步方法

package testBlog;

class MyThread implements Runnable {
    private int ticket = 10;

    @Override
    public void run() {// 重点在此:要在覆写的run()方法中写上synchronized方法
        int x;
        for (x = 0; x < 20; x++) {// 执行20次sale()方法
            this.sale();
        }
    }

    public synchronized void sale() {// synchronized处通常是static的位置啊.这是一个synchronized方法
        if (ticket > 0) {
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName() + "卖票,票数剩余:" + --ticket);//这里用前减减更合适
        }
    }

}

public class Test {
    public static void main(String[] args) {
        MyThread mt = new MyThread();
        new Thread(mt, "票贩子A").start();
        new Thread(mt, "票贩子B").start();
        new Thread(mt, "票贩子C").start();

    }
}