public void run() 
	{
		int i = 0;
		while(true)
		{
//			System.out.println("number ： "  + i++);
			System.out.println("number ： "  + this.i++);
			try{
				Thread.sleep((long)Math.random() * 6000);
			}
			catch(InterruptedException e)
			{
				e.printStackTrace();
			}
//			if(50 == this.i)
		    if(50 == this.i)
			{
				break;
			}
			
		}
	}