The specification of `java.nio.channels.FileChannel` is updated to clarify that the effect of attempting to write at a specific position using the `FileChannel::write(ByteBuffer,long)` method is system-dependent when the channel is open in append mode. That is, a `java.nio.file.StandardOpenOption.APPEND` is passed to `FileChannel::open` when the channel is opened. In particular, on some operating systems, bytes will be written at the given position, while on other operating systems the given position will be ignored and the bytes will be appended to the file.