import jp.jbxl.*;



class UDP_S
{

	public static void  main(String args[])
   	{
    	UDP udp = new UDP(8000);
       	String recv = "";

		while(true){
       		try {
           		recv = udp.recvMesg();
           		udp.sendMesgln("OK");
       		}
       		catch (Exception er) {
           		//er.printStackTrace();
           		recv = "接続失敗\n";
       			System.out.print(recv);
				break;
       		}

       		System.out.print(recv);
		}
       	udp.close();
   	}

}