Thread synchronized 鎖方法和鎖對象

//優先級
public class Priority {
    public static void main(String[] args) {
        MyThread myThread = new MyThread();
        Thread t1 = new Thread(myThread,"1");
        Thread t2 = new Thread(myThread,"2");
        Thread t3 = new Thread(myThread,"3");
        Thread t4 = new Thread(myThread,"4");
        Thread t5 = new Thread(myThread,"5");

        t1.start();

        t2.setPriority(8);
        t2.start();

        t3.setPriority(10);
        t3.start();

        t4.setPriority(9);
        t4.start();
    }
}


class MyThread implements Runnable {
    int ticket = 60 ;
  /* */
    @Override
    public void run() {
        while(true){
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized((Object)ticket) {
                if (ticket > 0) {
                    System.out.println(Thread.currentThread().getName() + "=>" + Thread.currentThread().getPriority() + " ticket" + ticket--);
                    if (ticket % 4 == 0)
                        System.out.println("------");
                } else
                    break;
            }
        }
    }
/*
    @Override
    public void run() {
            while(true){
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                if(!func()){
                    break;
                }
                if(ticket%4==0)
                    System.out.println("------");
            }
    }

    private synchronized boolean func() {
        if(ticket>0){
           System.out.println(Thread.currentThread().getName()+ "=>" + Thread.currentThread().getPriority()+" ticket"+ticket-- );
            return true;
        }else
            return false;
    }

     */
}