//使用同步方法

publicclass Test5{

    publicstaticvoid main(String[] args) {

       MyThread mt = new MyThread();

       new Thread(mt,"A").start();

       new Thread(mt,"B").start();

       new Thread(mt,"C").start();

    }

}

class MyThread implements Runnable{

    privateintticket = 10;

    @Override

    publicvoid run() {

       for(inti = 0 ; i < 20 ; i++){

           this.sale();

       }

    }

    public synchronizedvoid sale(){  同步方法

       if(this.ticket > 0){

           try {

              Thread.sleep(100);

           } catch (InterruptedException e) {

              e.printStackTrace();

           }

           System.out.println(Thread.currentThread().getName()+ "saleticket=" + this.ticket--);

       }

    }