What filesystem, what OS? Linux with ext2/ext3 has 1 second timestamp granularity.
Linux 2.6 claims to have nanosecond resolution on some filesystems (e.g. XFS, JFS). See http://www.uwsg.iu.edu/hypermail/linux/kernel/0210.3/0793.html On Linux I wouldn't rely on anything below 1 second resolution though. Stefans' heuristics are probably a good thing. There are a number of discussions on LKML because of nanosecond truncating on some file systems in relation to make-driven builds. This probably hurts ant, too: http://www.ussg.iu.edu/hypermail/linux/kernel/0404.0/0193.html Regards Henning On Fri, 2005-08-12 at 13:31 +0200, Torsten Curdt wrote: > Guys, > > I hope this is not too OT for this list but I > am running out of ideas. What could be possibly > be wrong with the following piece of code: > > import java.io.File; > > public class test { > public static void main(String[] args) throws Exception { > File dir = new File("dir"); > dir.mkdir(); > long m = dir.lastModified(); > File subdir = new File(dir, "subdir"); > subdir.mkdir(); > while(dir.lastModified() == m) { > Thread.sleep(1000); > System.out.print('.'); > } > subdir.delete(); > dir.delete(); > } > } > > To me it seems like the last modified > is not being updated (even if I re-create > the File object) unless the directory > gets touched *outside* the jvm. > > Anyone aware of this problem? > > cheers > -- > Torsten -- Dipl.-Inf. (Univ.) Henning P. Schmiedehausen INTERMETA GmbH [EMAIL PROTECTED] +49 9131 50 654 0 http://www.intermeta.de/ RedHat Certified Engineer -- Jakarta Turbine Development Linux, Java, perl, Solaris -- Consulting, Training, Engineering 4 - 8 - 15 - 16 - 23 - 42 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
