466 

   467     // Try to use up the input stream without impact the performance too much.

   468     void deplete(boolean tryToRead) throws IOException {

   469         int remaining = is.available();

   470         if (tryToRead && (remaining == 0)) {

   471             // try to wait and read one byte if no buffered input

   472             is.read();

   473         }

   474 

   475         while ((remaining = is.available()) != 0) {

   476             is.skip(remaining);

   477         }

   478     }