code: @Override
      public void write(int oneByte) {
          if (count == buf.length) {
              expand(1);
          }
          buf[count++] = (byte) oneByte;
      }
docs: Writes the specified byte {@code oneByte} to the OutputStream. Only the
  low order byte of {@code oneByte} is written.
  
  @param oneByte
  the byte to be written.