From martijnverburg at gmail.com  Thu Sep  7 09:00:53 2017
From: martijnverburg at gmail.com (Martijn Verburg)
Date: Thu, 7 Sep 2017 10:00:53 +0100
Subject: Differences between OpenJDK and OracleJDK
Message-ID: <CAP7YuARduMPv1GMPwMRJuXkJeS=sede3xQ93CjpmsKoE0cZiZQ@mail.gmail.com>

Hi all,

I've put up a short doc here
<https://github.com/AdoptOpenJDK/openjdk-build/wiki/Differences-between-Adopt-OpenJDK-binaries-and-Oracle-JDK-Binaries>
but
I'm concerned about it's accuracy.  If there are others who have more
information then please do let me know.

Cheers,
Martijn

From neugens at redhat.com  Thu Sep  7 09:15:32 2017
From: neugens at redhat.com (Mario Torre)
Date: Thu, 7 Sep 2017 11:15:32 +0200
Subject: Differences between OpenJDK and OracleJDK
In-Reply-To: <CAP7YuARduMPv1GMPwMRJuXkJeS=sede3xQ93CjpmsKoE0cZiZQ@mail.gmail.com>
References: <CAP7YuARduMPv1GMPwMRJuXkJeS=sede3xQ93CjpmsKoE0cZiZQ@mail.gmail.com>
Message-ID: <CAJwKKmbCLuD0zx_ThLb9NBo9fLj_206OuaOH71MN6QEu2u9uGQ@mail.gmail.com>

Isn't ductus gone for good in 9? I thought Marlin replaced it also in
the closed version (at least by default), but I may be wrong, this
should be checked.

Cheers,
Mario

On Thu, Sep 7, 2017 at 11:00 AM, Martijn Verburg
<martijnverburg at gmail.com> wrote:
> Hi all,
>
> I've put up a short doc here
> <https://github.com/AdoptOpenJDK/openjdk-build/wiki/Differences-between-Adopt-OpenJDK-binaries-and-Oracle-JDK-Binaries>
> but
> I'm concerned about it's accuracy.  If there are others who have more
> information then please do let me know.
>
> Cheers,
> Martijn

From martijnverburg at gmail.com  Thu Sep  7 10:15:50 2017
From: martijnverburg at gmail.com (Martijn Verburg)
Date: Thu, 7 Sep 2017 11:15:50 +0100
Subject: Differences between OpenJDK and OracleJDK
In-Reply-To: <CAJwKKmbCLuD0zx_ThLb9NBo9fLj_206OuaOH71MN6QEu2u9uGQ@mail.gmail.com>
References: <CAP7YuARduMPv1GMPwMRJuXkJeS=sede3xQ93CjpmsKoE0cZiZQ@mail.gmail.com>
 <CAJwKKmbCLuD0zx_ThLb9NBo9fLj_206OuaOH71MN6QEu2u9uGQ@mail.gmail.com>
Message-ID: <CAP7YuAQeVOpBjn648BYWD=gjw=+iG0cSh0m9JhbqWV4s3RkqMw@mail.gmail.com>

Hi Mario,

Thanks - did some digging and have corrected that page.

Cheers,
Martijn

On 7 September 2017 at 10:15, Mario Torre <neugens at redhat.com> wrote:

> Isn't ductus gone for good in 9? I thought Marlin replaced it also in
> the closed version (at least by default), but I may be wrong, this
> should be checked.
>
> Cheers,
> Mario
>
> On Thu, Sep 7, 2017 at 11:00 AM, Martijn Verburg
> <martijnverburg at gmail.com> wrote:
> > Hi all,
> >
> > I've put up a short doc here
> > <https://github.com/AdoptOpenJDK/openjdk-build/wiki/Differences-between-
> Adopt-OpenJDK-binaries-and-Oracle-JDK-Binaries>
> > but
> > I'm concerned about it's accuracy.  If there are others who have more
> > information then please do let me know.
> >
> > Cheers,
> > Martijn
>

From dalibor.topic at oracle.com  Thu Sep  7 12:52:09 2017
From: dalibor.topic at oracle.com (dalibor topic)
Date: Thu, 7 Sep 2017 14:52:09 +0200
Subject: Differences between OpenJDK and OracleJDK
In-Reply-To: <CAP7YuARduMPv1GMPwMRJuXkJeS=sede3xQ93CjpmsKoE0cZiZQ@mail.gmail.com>
References: <CAP7YuARduMPv1GMPwMRJuXkJeS=sede3xQ93CjpmsKoE0cZiZQ@mail.gmail.com>
Message-ID: <4f7cf51c-df5a-6daa-cffd-59a484cb5785@oracle.com>



On 07.09.2017 11:00, Martijn Verburg wrote:
> Hi all,
> 
> I've put up a short doc here
> <https://github.com/AdoptOpenJDK/openjdk-build/wiki/Differences-between-Adopt-OpenJDK-binaries-and-Oracle-JDK-Binaries>
> but
> I'm concerned about it's accuracy.  If there are others who have more
> information then please do let me know.

"As per Oracle's recent statement to open source these remaining 
components, we expect ..." is speculative, rather than accurate. If you 
are discussing differences between builds as they exist today, 
speculating about them in the future is not very informative.

If you want to have a more accurate sense of differences, I'd suggest 
instead starting with detecting the differences between your builds and 
the OpenJDK 8/9 RI builds, if any exist. That should be fairly easy to 
figure out. If there are interesting differences there, then that'd be 
useful to know to someone, I guess. ;)

cheers,
dalibor topic

-- 
<http://www.oracle.com> Dalibor Topic | Principal Product Manager
Phone: +494089091214 <tel:+494089091214> | Mobile: +491737185961
<tel:+491737185961>

ORACLE Deutschland B.V. & Co. KG | K?hneh?fe 5 | 22761 Hamburg

ORACLE Deutschland B.V. & Co. KG
Hauptverwaltung: Riesstr. 25, D-80992 M?nchen
Registergericht: Amtsgericht M?nchen, HRA 95603

Komplement?rin: ORACLE Deutschland Verwaltung B.V.
Hertogswetering 163/167, 3543 AS Utrecht, Niederlande
Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697
Gesch?ftsf?hrer: Alexander van der Ven, Jan Schultheiss, Val Maher

<http://www.oracle.com/commitment> Oracle is committed to developing
practices and products that help protect the environment

From martijnverburg at gmail.com  Thu Sep  7 13:17:13 2017
From: martijnverburg at gmail.com (Martijn Verburg)
Date: Thu, 7 Sep 2017 14:17:13 +0100
Subject: Differences between OpenJDK and OracleJDK
In-Reply-To: <4f7cf51c-df5a-6daa-cffd-59a484cb5785@oracle.com>
References: <CAP7YuARduMPv1GMPwMRJuXkJeS=sede3xQ93CjpmsKoE0cZiZQ@mail.gmail.com>
 <4f7cf51c-df5a-6daa-cffd-59a484cb5785@oracle.com>
Message-ID: <CAP7YuAQJ4vfnGL1_-KzcSHKALfcWudBv_PH2yN88=KczxCa1Ug@mail.gmail.com>

Hi Dalibor,

Thanks - have updated the page.  In terms of comparing builds its more a
case of comparing our Adopt OpenJDK build vs the Oracle commercial build
(we'll also do a compare against OpenJDK binaries coming from Oracle as we
will eventually start to differ in small ways).  I'll see if I can do a jar
contents comparison :-).

Cheers,
Martijn

On 7 September 2017 at 13:52, dalibor topic <dalibor.topic at oracle.com>
wrote:

>
>
> On 07.09.2017 11:00, Martijn Verburg wrote:
>
>> Hi all,
>>
>> I've put up a short doc here
>> <https://github.com/AdoptOpenJDK/openjdk-build/wiki/
>> Differences-between-Adopt-OpenJDK-binaries-and-Oracle-JDK-Binaries>
>> but
>> I'm concerned about it's accuracy.  If there are others who have more
>> information then please do let me know.
>>
>
> "As per Oracle's recent statement to open source these remaining
> components, we expect ..." is speculative, rather than accurate. If you are
> discussing differences between builds as they exist today, speculating
> about them in the future is not very informative.
>
> If you want to have a more accurate sense of differences, I'd suggest
> instead starting with detecting the differences between your builds and the
> OpenJDK 8/9 RI builds, if any exist. That should be fairly easy to figure
> out. If there are interesting differences there, then that'd be useful to
> know to someone, I guess. ;)
>
> cheers,
> dalibor topic
>
> --
> <http://www.oracle.com> Dalibor Topic | Principal Product Manager
> Phone: +494089091214 <tel:+494089091214> | Mobile: +491737185961
> <tel:+491737185961>
>
> ORACLE Deutschland B.V. & Co. KG | K?hneh?fe 5 |
> <https://maps.google.com/?q=V.+%26+Co.+KG+%7C+K%C3%BChneh%C3%B6fe+5+%7C&entry=gmail&source=g>
> 22761 Hamburg
>
> ORACLE Deutschland B.V. & Co. KG
> Hauptverwaltun
> <https://maps.google.com/?q=ptverwaltun&entry=gmail&source=g>g: Riesstr.
> 25, D-80992 M?nchen
> Registergericht: Amtsgericht M?nchen, HRA 95603
>
> Komplement?rin: ORACLE Deutschland Verwaltung B.V.
> Hertogswetering 163/167, 3543 AS Utrecht, Niederlande
> Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697
> Gesch?ftsf?hrer: Alexander van der Ven, Jan Schultheiss, Val Maher
>
> <http://www.oracle.com/commitment> Oracle is committed to developing
> practices and products that help protect the environment
>

From dalibor.topic at oracle.com  Thu Sep  7 13:28:43 2017
From: dalibor.topic at oracle.com (dalibor topic)
Date: Thu, 7 Sep 2017 15:28:43 +0200
Subject: Differences between OpenJDK and OracleJDK
In-Reply-To: <4f7cf51c-df5a-6daa-cffd-59a484cb5785@oracle.com>
References: <CAP7YuARduMPv1GMPwMRJuXkJeS=sede3xQ93CjpmsKoE0cZiZQ@mail.gmail.com>
 <4f7cf51c-df5a-6daa-cffd-59a484cb5785@oracle.com>
Message-ID: <8f14d81b-ee26-4574-de97-00aa5ed2b520@oracle.com>



On 07.09.2017 14:52, dalibor topic wrote:
> 
> 
> On 07.09.2017 11:00, Martijn Verburg wrote:
>> Hi all,
>>
>> I've put up a short doc here
>> <https://github.com/AdoptOpenJDK/openjdk-build/wiki/Differences-between-Adopt-OpenJDK-binaries-and-Oracle-JDK-Binaries> 
>>
>> but
>> I'm concerned about it's accuracy.? If there are others who have more
>> information then please do let me know.
> 
> "As per Oracle's recent statement to open source these remaining 
> components, we expect ..." is speculative, rather than accurate. If you 
> are discussing differences between builds as they exist today, 
> speculating about them in the future is not very informative.
> 
> If you want to have a more accurate sense of differences, I'd suggest 
> instead starting with detecting the differences between your builds and 
> the OpenJDK 8/9 RI builds, if any exist. That should be fairly easy to 
> figure out. If there are interesting differences there, then that'd be 
> useful to know to someone, I guess. ;)

With respect to the Oracle JDK, differences to OpenJDK RI builds (which 
again may be quite different from what you are building, per the above) 
would be things like additional documentation, executable 
installers/packages, third party materials such as bundled libraries, 
fonts, etc., deployment tooling, root certificates, commercial features, 
etc.

Some distributors provide their own versions of some of the above, which 
makes it hard to make a general statement about the differences between 
Oracle JDK and arbitrary OpenJDK builds. For example, OpenJDK builds by 
third parties are often provided as native packages on Linux by the 
respective third party distributors. In addition, things change over 
time. ;)

As such, your focus on that page to try to figure out the differences 
only for your own builds is a good restriction of scope.

cheers,
dalibor topic

> 
> cheers,
> dalibor topic
> 

-- 
<http://www.oracle.com> Dalibor Topic | Principal Product Manager
Phone: +494089091214 <tel:+494089091214> | Mobile: +491737185961
<tel:+491737185961>

ORACLE Deutschland B.V. & Co. KG | K?hneh?fe 5 | 22761 Hamburg

ORACLE Deutschland B.V. & Co. KG
Hauptverwaltung: Riesstr. 25, D-80992 M?nchen
Registergericht: Amtsgericht M?nchen, HRA 95603

Komplement?rin: ORACLE Deutschland Verwaltung B.V.
Hertogswetering 163/167, 3543 AS Utrecht, Niederlande
Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697
Gesch?ftsf?hrer: Alexander van der Ven, Jan Schultheiss, Val Maher

<http://www.oracle.com/commitment> Oracle is committed to developing
practices and products that help protect the environment

From sadhak001 at gmail.com  Tue Sep 19 21:55:16 2017
From: sadhak001 at gmail.com (Mani Sarkar)
Date: Tue, 19 Sep 2017 21:55:16 +0000
Subject: Become an early Java 9 expert: AJUG + vJUG + JUGs Worldwide Hackday
 Feedback on JDK 9 EA
Message-ID: <CAGHtMWmqeVt5ORGGuYo7EDp-7whA2Dogos_hd3SGh1s_y2_c-Q@mail.gmail.com>

Hi all,

My apologies for the delayed message, as everyone is getting ready for
JavaOne and also busy with working on JDK 9 RC1 feedback since last month.

Last month (19th August 2017) AJUG and a number of JUGs worldwide with the
help and support from vJUG, re-ran the  "Become an early Java 9 expert"
hackday.

You can find the feedback gathered in http://bit.ly/J9HackDay-AJUG-feedback,
we have been trailing JDK 9 EA b181 (RC1).

I hope you will be able to make good use of the feedback and post your
responses in the doc, I could also post the individual issues as separate
messages if they become discussion worthy.

Like the previous time, points that need addressing are marked with a
rightwards arrowhead ( ? ) - we have had three categories of feedbacks
namely *Potential bugs, Suggestions* and *Queries* about the different
aspects of Jigsaw & Java 9.

Please let me know if any other individuals or lists need to be informed
about this.

Thanks.

Cheers,
Mani
-- 
@theNeomatrix369 <http://twitter.com/theNeomatrix369>*  |  **Blog
<http://neomatrix369.wordpress.com/>**  |  *@adoptopenjdk | Dev communities
*Meet-a-Project - *MutabilityDetector
<https://github.com/MutabilityDetector>*  |  **Bitbucket
<https://bitbucket.org/neomatrix369>* * |  **Github
<https://github.com/neomatrix369>* * |  **LinkedIn
<http://uk.linkedin.com/pub/mani-sarkar/71/a77/39b>*
*Come to Devoxx UK 2018:* http://www.devoxx.co.uk/

*Don't chase success, rather aim for "Excellence", and success will come
chasing after you!*

From sadhak001 at gmail.com  Tue Sep 19 21:57:50 2017
From: sadhak001 at gmail.com (Mani Sarkar)
Date: Tue, 19 Sep 2017 21:57:50 +0000
Subject: Become an early Java 9 expert: AJUG + vJUG + JUGs Worldwide
 Hackday Feedback on JDK 9 EA
In-Reply-To: <CAGHtMWmqeVt5ORGGuYo7EDp-7whA2Dogos_hd3SGh1s_y2_c-Q@mail.gmail.com>
References: <CAGHtMWmqeVt5ORGGuYo7EDp-7whA2Dogos_hd3SGh1s_y2_c-Q@mail.gmail.com>
Message-ID: <CAGHtMWn+Zb0PFdqj0V=Wp1c_kQEr4EhrZR6HkzTvejOasu=JpQ@mail.gmail.com>

Adding hubert.pan3 at gmail.com, vaslabsco at gmail.com, mgrand at markgrand.com to
the conversation.

On Tue, 19 Sep 2017 at 22:55 Mani Sarkar <sadhak001 at gmail.com> wrote:

> Hi all,
>
> My apologies for the delayed message, as everyone is getting ready for
> JavaOne and also busy with working on JDK 9 RC1 feedback since last month.
>
> Last month (19th August 2017) AJUG and a number of JUGs worldwide with
> the help and support from vJUG, re-ran the  "Become an early Java 9 expert"
> hackday.
>
> You can find the feedback gathered in
> http://bit.ly/J9HackDay-AJUG-feedback, we have been trailing JDK 9 EA
> b181 (RC1).
>
> I hope you will be able to make good use of the feedback and post your
> responses in the doc, I could also post the individual issues as separate
> messages if they become discussion worthy.
>
> Like the previous time, points that need addressing are marked with a
> rightwards arrowhead ( ? ) - we have had three categories of feedbacks
> namely *Potential bugs, Suggestions* and *Queries* about the different
> aspects of Jigsaw & Java 9.
>
> Please let me know if any other individuals or lists need to be informed
> about this.
>
> Thanks.
>
> Cheers,
> Mani
> --
> @theNeomatrix369 <http://twitter.com/theNeomatrix369>*  |  **Blog
> <http://neomatrix369.wordpress.com/>**  |  *@adoptopenjdk | Dev
> communities
> *Meet-a-Project - *MutabilityDetector
> <https://github.com/MutabilityDetector>*  |  **Bitbucket
> <https://bitbucket.org/neomatrix369>* * |  **Github
> <https://github.com/neomatrix369>* * |  **LinkedIn
> <http://uk.linkedin.com/pub/mani-sarkar/71/a77/39b>*
> *Come to Devoxx UK 2018:* http://www.devoxx.co.uk/
>
> *Don't chase success, rather aim for "Excellence", and success will come
> chasing after you!*
>
-- 
@theNeomatrix369 <http://twitter.com/theNeomatrix369>*  |  **Blog
<http://neomatrix369.wordpress.com/>**  |  *@adoptopenjdk | Dev communities
*Meet-a-Project - *MutabilityDetector
<https://github.com/MutabilityDetector>*  |  **Bitbucket
<https://bitbucket.org/neomatrix369>* * |  **Github
<https://github.com/neomatrix369>* * |  **LinkedIn
<http://uk.linkedin.com/pub/mani-sarkar/71/a77/39b>*
*Come to Devoxx UK 2018:* http://www.devoxx.co.uk/

*Don't chase success, rather aim for "Excellence", and success will come
chasing after you!*

From alex.buckley at oracle.com  Wed Sep 20 01:54:26 2017
From: alex.buckley at oracle.com (Alex Buckley)
Date: Tue, 19 Sep 2017 18:54:26 -0700
Subject: Become an early Java 9 expert: AJUG + vJUG + JUGs Worldwide
 Hackday Feedback on JDK 9 EA
In-Reply-To: <CAGHtMWmqeVt5ORGGuYo7EDp-7whA2Dogos_hd3SGh1s_y2_c-Q@mail.gmail.com>
References: <CAGHtMWmqeVt5ORGGuYo7EDp-7whA2Dogos_hd3SGh1s_y2_c-Q@mail.gmail.com>
Message-ID: <59C1CA52.6030504@oracle.com>

Hi Mani,

On 9/19/2017 2:55 PM, Mani Sarkar wrote:
> Last month (19th August 2017) AJUG and a number of JUGs worldwide with the
> help and support from vJUG, re-ran the  "Become an early Java 9 expert"
> hackday.

Thank you AJUG and vJUG!

> You can find the feedback gathered in http://bit.ly/J9HackDay-AJUG-feedback,
> we have been trailing JDK 9 EA b181 (RC1).

A lot of feedback seems to boil down to "JDK command line tools are not 
so easy to use; I want my IDE!". I don't mean to make light of people's 
usability issues, but the module-related paths and flags in JDK 9 tools 
tend to operate along similar lines as the paths and flags in JDK 8 
tools -- it's just that a lot of people haven't set ANY paths and flags 
for a long time.

I see there were some more open-ended questions and this one in 
particular caught my attention:

-----
Do I need to convert a legacy Java program to use named modules in order 
to take advantage of the smaller images that jlink can create?

Mani: You will have to convert your applications to use Java 9?s modules 
system in order to take advantage of JLink fully, although please play 
around with older legacy apps to see what JLink produces (most likely 
the whole JDK and not modularised pieces).

Simon: create an empty module with module-info.java and handcraft the 
dependencies using requires and have jlink compile it. This is 
experimental, would need to be tested to see how it works.
-----

The direct answer to the question is "No, you do not need to convert a 
legacy Java program to use named modules in order to take advantage of 
the smaller images that jlink can create."

The Java runtime that's present in even the smallest image (just 
java.base) still lets you to put your pre-existing JAR files on the 
classpath and run them with java -cp. You do not need to turn your JAR 
files into named modules. Even as traditional JAR files, they have 
access to all the APIs that you would expect from such an image. 
(Obviously if your JAR files try to use Swing on an image built from 
just java.base, that won't work.) The reduced footprint and security 
surface of the smaller image is plainly an advantage from jlink.

Alex

From abdul.kolarkunnu at oracle.com  Fri Sep 22 01:20:02 2017
From: abdul.kolarkunnu at oracle.com (Muneer Kolarkunnu)
Date: Thu, 21 Sep 2017 18:20:02 -0700 (PDT)
Subject: Release Announcement: General Availability of JDK 9
Message-ID: <cd75182c-868d-471b-b509-b89cf891a8d8@default>

Hi All,

Three items to share with you today 

JDK 9 General Availability 

GPL'd binaries from Oracle are available here:

http://jdk.java.net/9

See Mark Reinhold's email for more details on the Release [1] 

delivery of Project Jigsaw [2]

Are you JDK 9 Ready ?

The Quality Outreach wiki[3] has been updated to include a JDK 9 Ready column.??
If you would like us to identify your project as JDK 9 ready , please let me know and I will add it to the wiki.

Quality Outreach Report for September 2017[4] is available

many thanks for your continued support and welcome to the new projects!

[1] http://mail.openjdk.java.net/pipermail/announce/2017-September/000230.html
[2] https://mreinhold.org/blog/jigsaw-complete

[3] https://wiki.openjdk.java.net/display/quality/Quality+Outreach

[4] https://wiki.openjdk.java.net/display/quality/Quality+Outreach+report+September+2017

?

-- 

Regards,

Abdul Muneer Kolarkunnu

Quality Engineer

Oracle, Bangalore, India

?

From martijnverburg at gmail.com  Fri Sep 22 07:40:34 2017
From: martijnverburg at gmail.com (Martijn Verburg)
Date: Fri, 22 Sep 2017 07:40:34 +0000
Subject: Release Announcement: General Availability of JDK 9
In-Reply-To: <cd75182c-868d-471b-b509-b89cf891a8d8@default>
References: <cd75182c-868d-471b-b509-b89cf891a8d8@default>
Message-ID: <CAP7YuAS-SJHCQoQn5uxc0D1nd=eokgyUaUUAX6mdUGT0svo_7w@mail.gmail.com>

Congrats to everyone at Oracle and the other OpenJDK folks - good to see
Java 9 out and the continued quality efforts.

We are working on running the JCK for 8 (will get 9 shortly) and can then
cross reference test failures etc with you going forwards.

Cheers,
Martijn

On Fri, 22 Sep 2017 at 02:20, Muneer Kolarkunnu <abdul.kolarkunnu at oracle.com>
wrote:

> Hi All,
>
> Three items to share with you today
>
> JDK 9 General Availability
>
> GPL'd binaries from Oracle are available here:
>
> http://jdk.java.net/9
>
> See Mark Reinhold's email for more details on the Release [1]
>
> delivery of Project Jigsaw [2]
>
> Are you JDK 9 Ready ?
>
> The Quality Outreach wiki[3] has been updated to include a JDK 9 Ready
> column.
> If you would like us to identify your project as JDK 9 ready , please let
> me know and I will add it to the wiki.
>
> Quality Outreach Report for September 2017[4] is available
>
> many thanks for your continued support and welcome to the new projects!
>
> [1]
> http://mail.openjdk.java.net/pipermail/announce/2017-September/000230.html
> [2] https://mreinhold.org/blog/jigsaw-complete
>
> [3] https://wiki.openjdk.java.net/display/quality/Quality+Outreach
>
> [4]
> https://wiki.openjdk.java.net/display/quality/Quality+Outreach+report+September+2017
>
>
>
> --
>
> Regards,
>
> Abdul Muneer Kolarkunnu
>
> Quality Engineer
>
> Oracle, Bangalore, India
>
>
>
-- 
Cheers, Martijn (Sent from Gmail Mobile)

From sadhak001 at gmail.com  Fri Sep 22 14:21:04 2017
From: sadhak001 at gmail.com (Mani Sarkar)
Date: Fri, 22 Sep 2017 14:21:04 +0000
Subject: Become an early Java 9 expert: AJUG + vJUG + JUGs Worldwide
 Hackday Feedback on JDK 9 EA
In-Reply-To: <59C1CA52.6030504@oracle.com>
References: <CAGHtMWmqeVt5ORGGuYo7EDp-7whA2Dogos_hd3SGh1s_y2_c-Q@mail.gmail.com>
 <59C1CA52.6030504@oracle.com>
Message-ID: <CAGHtMWkZdsC_4scD-Uk51o-aGdeqA4wBuwtKzJbixFDM9YdEYA@mail.gmail.com>

Thanks Alex for the response, and clarifying the question further with your
answer.

There a few issues reported as well, would you want to comment on them,
should I put them on a separate thread for further discussions?

Cheers,
Mani


On Wed, 20 Sep 2017 at 02:54 Alex Buckley <alex.buckley at oracle.com> wrote:

> Hi Mani,
>
> On 9/19/2017 2:55 PM, Mani Sarkar wrote:
> > Last month (19th August 2017) AJUG and a number of JUGs worldwide with
> the
> > help and support from vJUG, re-ran the  "Become an early Java 9 expert"
> > hackday.
>
> Thank you AJUG and vJUG!
>
> > You can find the feedback gathered in
> http://bit.ly/J9HackDay-AJUG-feedback,
> > we have been trailing JDK 9 EA b181 (RC1).
>
> A lot of feedback seems to boil down to "JDK command line tools are not
> so easy to use; I want my IDE!". I don't mean to make light of people's
> usability issues, but the module-related paths and flags in JDK 9 tools
> tend to operate along similar lines as the paths and flags in JDK 8
> tools -- it's just that a lot of people haven't set ANY paths and flags
> for a long time.
>
> I see there were some more open-ended questions and this one in
> particular caught my attention:
>
> -----
> Do I need to convert a legacy Java program to use named modules in order
> to take advantage of the smaller images that jlink can create?
>
> Mani: You will have to convert your applications to use Java 9?s modules
> system in order to take advantage of JLink fully, although please play
> around with older legacy apps to see what JLink produces (most likely
> the whole JDK and not modularised pieces).
>
> Simon: create an empty module with module-info.java and handcraft the
> dependencies using requires and have jlink compile it. This is
> experimental, would need to be tested to see how it works.
> -----
>
> The direct answer to the question is "No, you do not need to convert a
> legacy Java program to use named modules in order to take advantage of
> the smaller images that jlink can create."
>
> The Java runtime that's present in even the smallest image (just
> java.base) still lets you to put your pre-existing JAR files on the
> classpath and run them with java -cp. You do not need to turn your JAR
> files into named modules. Even as traditional JAR files, they have
> access to all the APIs that you would expect from such an image.
> (Obviously if your JAR files try to use Swing on an image built from
> just java.base, that won't work.) The reduced footprint and security
> surface of the smaller image is plainly an advantage from jlink.
>
> Alex
>
-- 
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