不同同步区域锁的有关问题

class Ticket implements Runnable//extends Thread //
{
	private static int tick = 100;
//	Object obj  = new Object();
	boolean b = true;

	public  void run()
	{

		if(b)
			while(true)		
				show();		
		else
		{
			while(true)
			{
				synchronized(Ticket.class)
				{
					if(tick>0)
					{
						try{Thread.sleep(10);}catch(Exception e){}
						System.out.println(Thread.currentThread().getName()+"...code....:"+tick--);
					}
				}
			}
		}
			
		
	}

	public static synchronized void show()
	{
		if(tick>0)
		{
			try{Thread.sleep(10);}catch(Exception e){}
			System.out.println(Thread.currentThread().getName()+"....show...:"+tick--);
		}
	}
}
class ThisLock 
{
	public static void main(String[] args) 
	{
		Ticket t = new Ticket();
		
		Thread t1 = new Thread(t);
		Thread t2 = new Thread(t);
		
		t1.start();
		try{Thread.sleep(10);}catch(Exception e){}
		t.b = false;

		t2.start();
	}
}