Implementing: java.nio.channels.ReadableByteChannel

Reads a sequence of bytes from this channel into the given buffer.

Bytes are read starting at this channel's current position, and then the position is updated with the number of bytes actually read. Otherwise this method behaves exactly as specified in the ReadableByteChannel interface.

Returns:  The number of bytes read, possibly zero, or -1 if the channel has reached end-of-stream

Implementing: java.nio.channels.WritableByteChannel

Writes a sequence of bytes to this channel from the given buffer.

Bytes are written starting at this channel's current position, unless the channel is connected to an entity such as a file that is opened with the APPEND option, in which case the position is first advanced to the end. The entity to which the channel is connected is grown, if necessary, to accommodate the written bytes, and then the position is updated with the number of bytes actually written. Otherwise this method behaves exactly as specified by the WritableByteChannel interface.

Returns:  The number of bytes written, possibly zero