code: final void writeLong(long value)
      {
          byte writeBuffer[] = new byte[8];
          writeBuffer[0] = (byte) (value >>> 56);
          writeBuffer[1] = (byte) (value >>> 48);
          writeBuffer[2] = (byte) (value >>> 40);
          writeBuffer[3] = (byte) (value >>> 32);
          writeBuffer[4] = (byte) (value >>> 24);
          writeBuffer[5] = (byte) (value >>> 16);
          writeBuffer[6] = (byte) (value >>> 8);
          writeBuffer[7] = (byte) (value >>> 0);
          write(writeBuffer, 0, 8);
      }
docs: Writes a <code>long</code> to the byte array as eight
  bytes, high byte first. In no exception is thrown, the counter
  <code>written</code> is incremented by <code>8</code>.
  
  @param value to be written.
  @see java.io.DataOutput#writeLong(long)