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public void run()
{
     int count=3;
     while(true)
     {
           System.out.println(this);                     //´òÓ¡¶ÔÏó
           try
           {
                 sleep(1000);                         //ÐÝÃß1000ms
            }catch(Exception e)
            {
                 e.printStackTrace();
             }
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