Implementing: java.nio.channels.SeekableByteChannel

Returns this channel's file position.

Returns:  This channel's file position, a non-negative integer counting the number of bytes from the beginning of the file to the current position

Implementing: java.nio.channels.SeekableByteChannel

Sets this channel's file position.

Setting the position to a value that is greater than the file's current size is legal but does not change the size of the file. A later attempt to read bytes at such a position will immediately return an end-of-file indication. A later attempt to write bytes at such a position will cause the file to be grown to accommodate the new bytes; the values of any bytes between the previous end-of-file and the newly-written bytes are unspecified.

Returns:  This file channel

Implementing: java.nio.channels.SeekableByteChannel

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

Bytes are read starting at this channel's current file position, and then the file 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.ScatteringByteChannel

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

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

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

Implementing: java.nio.channels.ScatteringByteChannel

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

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

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

Implementing: java.nio.channels.SeekableByteChannel

Returns the current size of this channel's file.

Returns:  The current size of this channel's file, measured in bytes

Implementing: java.nio.channels.SeekableByteChannel

Truncates this channel's file to the given size.

If the given size is less than the file's current size then the file is truncated, discarding any bytes beyond the new end of the file. If the given size is greater than or equal to the file's current size then the file is not modified. In either case, if this channel's file position is greater than the given size then it is set to that size.

Returns:  This file channel

Implementing: java.nio.channels.SeekableByteChannel

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

Bytes are written starting at this channel's current file position unless the channel is in append mode, in which case the position is first advanced to the end of the file. The file is grown, if necessary, to accommodate the written bytes, and then the file 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

Implementing: java.nio.channels.GatheringByteChannel

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

Bytes are written starting at this channel's current file position unless the channel is in append mode, in which case the position is first advanced to the end of the file. The file is grown, if necessary, to accommodate the written bytes, and then the file position is updated with the number of bytes actually written. Otherwise this method behaves exactly as specified in the GatheringByteChannel interface.

Returns:  The number of bytes written, possibly zero

Implementing: java.nio.channels.GatheringByteChannel

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

Bytes are written starting at this channel's current file position unless the channel is in append mode, in which case the position is first advanced to the end of the file. The file is grown, if necessary, to accommodate the written bytes, and then the file position is updated with the number of bytes actually written. Otherwise this method behaves exactly as specified in the GatheringByteChannel interface.

Returns:  The number of bytes written, possibly zero