From JDK12 it is not possible to drop 'final' modifier

[Enrico Olivelli]

Il mer 7 nov 2018, 19:57 Andrew Luo <andrewluotechnologies at outlook.com> ha
scritto:

> Also, you might want to take a look at JLS 13.4.9 "final Fields and
> Constants".  Primitive static final constants can be folded at compile
> time, so even if you were able to change it at runtime, it wouldn't have
> any effect...
>
Andrew,
Thanks, but my case is about a field which needs an initialization. So that
statement does not apply.

private static final int VAL = Integer.getInteger(sysprop)

Enrico


> Thanks,
>
> Andrew
>
> -----Original Message-----
> From: core-libs-dev <core-libs-dev-bounces at openjdk.java.net> On Behalf Of
> Alan Bateman
> Sent: Wednesday, November 7, 2018 10:11 AM
> To: Enrico Olivelli <eolivelli at gmail.com>; core-libs-dev at openjdk.java.net
> Subject: Re: From JDK12 it is not possible to drop 'final' modifier
>
> On 07/11/2018 16:42, Enrico Olivelli wrote:
> > Hi,
> > I am investigating this case about PowerMock, which is not able to
> > remove the 'final' modifier from a Field
> > https://github.com/powermock/powermock/issues/939
> >
> > Is there any suggested alternate way to remove such modifier ?
> >
> > I understand clearly that it is against how the JVM works and I really
> > appreciate this "change", but this is blocking tests of several
> > projects.
> >
> > The only work-around I see is to not use "final" modifier for things
> > that aren't really "final", but for instance my case is that "in
> > production" I want the field to be treaded as "final" (in particular
> > "final static" initialized with System Properties) but in unit tests I
> > would like to be able to change the value without spawning a new JVM.
> >
> > I did not find any JIRA about this behavioral change, do you have any
> pointer ?
> >
> > If this is the direction (and I totally support it) I will be fine and
> > adapt to the new rules.
> >
> Right, there's no supported way to change static final fields. Have you
> looked into the java agent dropping the final modifier at class load time?
>
> -Alan.
>
-- 


-- Enrico Olivelli