* gnu/java/nio/FileChannelImpl.java
(lengthInternal): Must be native.
(size): Check if channel is already closed.
(implCloseChannel): Reformated.
(read): w was unused, removed it.
(read): Removed.
(read): New method.
(write): New method.
(map): Check arguments.
(force): Throws IOException, check if channel is closed.
(transferTo): New method.
(transferFrom): New method.
(lock): New method.
(tryLock): New method.
(position): New method.
(truncate): New method.
(nio_mmap_file): Uncommented.
(nio_munmap_file): Uncommented.
(nio_msync): Uncommented.
* gnu/java/nio/natFileChannelImpl.cc: New file.
From-SVN: r62841
