Lập trình

     private String ten;

     public Dem(String ten) { this.ten = ten; }

    public void run() { 

           try {

         for(int i = 5; i > 0; i--) {

                     System.out.println(ten + " : " +i);

         Thread.sleep(200);             

}              

           } catch (InterruptedException ex) {}             

     }                                   

     public static void main(String args[]){              

           Dem d1 = new Dem("One"); Dem d2 = new Dem("Two");              

          d1.start(); d2.start();                         

    }                                     

}