It says it's targeted for 1.6. So until then, there's not much you can do unless you use a native call.
Many of us have been waiting since 1.1 for this, so don't hold your breath - expect it to be delayed until java 10 or something.
I mean, knowing whether you can move a file without corrupting it, and whether you can make a new file, and stuff like that, aren't important are they? No-one ever writes a server that is intelligent enough not to crash the OS by taking up too much space with it's logfiles, do they? Nor puts any defensive code in their clients?
</bitter, bitter sarcasm>