Does Java do anything to prevent files from changing out from under it?

[Florian Weimer]

* Martin Buchholz:

> Fixing this would require hooking into the OS file modification
> notification mechanism; not easy; how to abort a class load in
> progress?

Does the JVM ever reopen a JAR file to read more classes?

If it this isn't the case, at least there's a clean way to replace JARs
on UNIX platforms while a JVM is still referencing them.