HUJAK Community keynote presentation Branko Mihaljević Stjepan Matijašević Hrvoje Đurđević Slavko Žnidarić Marin Orlić Aleksander Radovan Jurica Križanić

1. HUJAK
Hrvatska udruga Java korisnika
www.hujak.hr
The story
of
Java & HUJAK
Branko Mihaljević
Stjepan Matijašević
Hrvoje Đurđević
Slavko Žnidarić
Marin Orlić
Aleksander Radovan
Jurica Križanić

2. Community Warm-up
• Why do real Java programmers wear glasses?
• Because they don't C#. 
• OK, what is HUJAK?
HUJAK is YOU!
• By YOU we mean: developers, programmers,
software architects, team leaders, IT managers,
project managers, students, educators,
entrepreneurs, enthusiasts, visionaries …
• Thank YOU all for coming to Javantura v3!
• And YOU are the reason why we're all here 
www.hujak.hr2

3. So, how old is Java?
• In 1991 began Stealth Project
• Green Team formed on some
brainstorming in Aspen
• Oak interpreter
• In autumn 1994
• First Java compiler written in Java
• HotJava graphical browser
• In 1995
• Oak was officially renamed Java
• Publicly announced at SunWorld '95
www.hujak.hr3

4. We all love numbers
• Continued growth of Java ...
• #1 Development Platform
• Now also in the Cloud
• 10 Million Java Developers
• 800.000 Java Certifications
• 13 Billion Devices run Java
• 200 Million Medical Devices
• 1 Billion Automotive Devices
• 97% of Enterprise Desktops
• 100% of Javantura visitors know Java 
www.hujak.hr4

5. Why Java?
• The most popular language (still )
• Portable and open source
• From enterprise applications to small smart devices
• IoT, sensorics, wearable, pervasive, ubiquitous …
• Enormous ecosystem of code, libraries and tools
• Major corporate and vendor backing
• Android! 
• Java is not a language, Java is a platform
• Most people talk about Java the Language, and this may
sound odd coming from me, but I could hardly care less.
At the core of Java ecosystem is the JVM. James Gosling
• 30+ JVM languages (Clojure, Groovy, Scala, JRuby, Jython …)
www.hujak.hr5

6. Popularity of Java Language
• PYPL index (PopularitY of Programming Language)
• Feb 2016
www.hujak.hr6
Rank Language Share Feb 2015
1 Java 24.2 % +0.3 %
2 Python 11.9 % +1.2 %
3 PHP 10.7 % -0.8 %
4 C# 8.9 % +0.1 %
5 C++ 7.6 % -0.5 %
6 C 7.5 % +0.1 %
7 JavaScript 7.3 % +0.3 %
8 Objective-C 5.0 % -0.9 %
9 Swift 3.0 % +0.4 %
10 R 2.9 % +0.3 %
Source: PYPL PopularitY of Programming Language, pypl.github.io, Feb 2016, © Pierre Carbonnelle
Java is always first! 

7. • PYPL UK – Feb 2015
Java Popularity in Europe
• PYPL Germany – Feb 2015
www.hujak.hr7
Rank Language Share Feb 2015
1 Python 22.0 % -0.2 %
2 Java 20.9 % -1.5 %
3 C# 13.6 % +1.4 %
4 PHP 9.8 % -0.9 %
5 C++ 9.7 % +0.5 %
Rank Language Share Feb 2015
1 Java 26.8 % -0.1 %
2 Python 16.5 % +2.7 %
3 C++ 12.0 % -1.4 %
4 C# 11.8 % +1.0 %
5 PHP 11.1 % -0.9 %
Source: PYPL PopularitY of Programming Language, pypl.github.io, May 2015, © Pierre Carbonnelle

8. Popularity of Java language #2
• TIOBE index (still controversial?!) Feb 2016
• April 2015 Headline: Java back at the top!
www.hujak.hr8
Rank Language Ratings Feb 2015
1 Java 21.145% +5.80%
2 C 15.594% -0.89%
3 C++ 6.907% +0.29%
4 C# 4.400% -1.34%
5 Python 4.180% +1.30
Source: Tiobe index, www.tiobe.com, Feb 2016

9. Top Languages
www.hujak.hr9
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Go (19)
Scala (18)
…
Objective-C (16)
…
Ruby
JavaScript
PHP
C#
Python
C++
C
Java
53.7%
62.1%
65.2%
78.6%
84.3%
84.6%
92.2%
93.4%
95.5%
99.2%
100.0%
• Top languages by IEEE Spectrum (12 metrics, 10 sources)
Source: Interactive: The Top Programming Languages, IEEE Spectrum, July 2014
Google (Search & Trends),
Github (active & created),
Stack Overflow (?s & views),
Hacker News, Career Builder,
Reddit, Dice, Topsy,
IEEE Xplore

10. Java at GitHub
• GitHut – discovery of active languages in GitHub
• Java is 2nd out of 2.2M active repositories
www.hujak.hr10 Source: GitHut, githut.info, Feb 2016
Java
222.852
active repositories
10% of GitHub
Java
2.323.315
total pushes

11. Java at GitHub/Stack Overflow
www.hujak.hr11 Source: The RedMonk Programming Language Rankings, January 2016
1. JavaScript
2. Java
3. PHP
4. Python
5. C#, C++, Ruby
8. CSS
9. C
10. Objective-C

12. Java Timeline (by Oracle)
www.hujak.hr12

13. Java Timeline (by HUJAK)
Could also take a look at oracle.com.edgesuite.net/timeline/java/ www.hujak.hr13
1995 1998 2001 2004 2007 2010 2013 2016 2019
Java SE 10
201920172014-3-18
Java EE 7
2013-6-12
HUJAK
2011-12-13
2011-7-28
Java EE 6
2009-12-10
Java SE 6
Mustang
2006-12-11
Java EE 5
2006-5-11
Java 5
J2SE 5.0
Tiger
2004-9-30
J2EE 1.4
2003-11-11
Java 1.4
J2SE 1.4
Merlin
2002-2-6
J2EE 1.3
2001-9-24
Java 1.3
J2SE 1.3
Kestrel
2000-5-8
J2EE 1.2
1999-12-12
Java 1.2
J2SE 1.2
Playground
1998-12-8
JPE
Java
Professional
Edition
1998-5
Java 1.1
JDK 1.1
1997-2-19
Java 1
JDK 1.0
Oak
1996-1-23
Java
JDK
Alpha/Beta
1995
© 2015, HUJAK
2010-1-27
Java SE 9
Java SE 7
Dolphin
Java SE 8
Spider
Java EE 8
2017/8
Java 2012
Javantura
Javantura v2
Java
publicly
announced
1995-3-23
Javantura v3

14. Java SE progress
• Where are we now?
www.hujak.hr14

15. • Any good books about Java 8? 
We already know Java 8
www.hujak.hr15

16. Java 9 and Beyond
• Modularity
• Performance – ahead of time compilation (startup speed), fast class
lookup, linker with optimization …
• Security – internal APIs (sun.*, *.internal.*), class dependency
analyzer …
• Project Jigsaw – Java Module System
• JEP 200: The Modular JDK – "umbrella"
• JEP 201: Modular Source Code
• JEP 220: Modular Run-Time Images
• JSR 376: Java Platform Module System
• Project Valhalla
• Value Types, Specialized Generics, Var Handles …
• Project Panama
• Foreign Function Interface, Data Layout Control, Arrays 2.0 …
www.hujak.hr16 Source: Java 9, and Beyond, Mark Reinhold, EclipseCon, March 12, 2015

17. Java SE 9 delayed
Proposed schedule change for JDK 9
mark.reinhold at oracle.com mark.reinhold at oracle.com Tue Dec 1 17:08:06 UTC 2015
The key feature of Java 9 is Project Jigsaw [1], which will introduce a standard module system and use that system to
modularize both the Java SE Platform and the JDK. This large project consists of a JSR for the module system plus five JEPs, for
the implementation of the module system and for other changes specific to the JDK. We've made good progress on Jigsaw
over the last eighteen months: We reorganized the source code into modules in August 2014 (JEP 201 [2]), restructured run-
time images to support modules in December 2014 (JEP 220 [3]), began discussions in the JSR 376 EG last February [4], and
published a design overview, draft specification, and EA builds in September [5]. More recently we presented an integrated
series of talks on Jigsaw at JavaOne 2015 and Devoxx BE 2015 [6] which were very well-attended and motivated many
developers to download the EA builds, try them out, and send feedback and suggestions.
In the current JDK 9 schedule [7] the Feature Complete milestone is set for 10 December, less than two weeks from today, but
Jigsaw needs more time. The JSR 376 EG has not yet published an Early Draft Review specification, the volume of interest and
the high quality of the feedback received over the last two months suggests that there will be much more to come, and we
want to ensure that the maintainers of the essential build tools and IDEs have adequate time to design and implement good
support for modular development.
For these reasons I hereby propose a six-month extension of the JDK 9 schedule, moving the Feature Complete (FC)
milestone to 25 May 2016, the General Availability (GA) milestone to 23 March 2017, and adjusting the interim milestones
accordingly. As with previous schedule changes, the intent here is not to open the gates to a flood of new features unrelated
to Jigsaw, nor to permit the scope of existing features to grow without bound. It would be best to use the additional time to
stabilize, polish, and fine-tune the features that we already have rather than add a bunch of new ones. The later FC milestone
does apply to all features, however, so reasonable proposals to target additional JEPs to JDK 9 will be considered so long as
they do not add undue risk to the overall release.
Comments on this proposal from JDK 9 Committers are welcome, as are reasoned objections. If no such objections are raised
by 18:00 UTC next Tuesday, 8 December, or if they're raised and satisfactorily answered, then per the JEP 2.0 process proposal
[8] this will be adopted as the new schedule for JDK 9.
- Mark
www.hujak.hr17 Source: http://mail.openjdk.java.net/pipermail/jdk9-dev/2015-December/003149.html

18. Java SE 9 Schedule
• Proposed schedule for JDK 9
2016-05-26 Feature Complete (was 2015-12-10)
2016-08-11 All Tests Run (was 2016-02-04)
2016-09-01 Rampdown Start (was 2016-02-25)
2016-10-20 Zero Bug Bounce (was 2016-04-21)
2016-12-01 Rampdown Phase 2 (was 2016-06-16)
2017-01-26 Final Release Candidate (was 2016-07-21)
2017-03-23 General Availability (was 2016-09-22)
www.hujak.hr18 Source: http://openjdk.java.net/projects/jdk9/, Feb 2016

19. JDK 9 – what's in it?
102: Process API Updates
110: HTTP 2 Client
143: Improve Contended Locking
158: Unified JVM Logging
165: Compiler Control
197: Segmented Code Cache
199: Smart Java Compilation, Phase Two
201: Modular Source Code
211: Elide Deprecation Warnings on
Import Statements
212: Resolve Lint and Doclint Warnings
213: Milling Project Coin
214: Remove GC Combinations
Deprecated in JDK 8
215: Tiered Attribution for javac
216: Process Import Statements
Correctly
217: Annotations Pipeline 2.0
219: Datagram Transport Layer Security
(DTLS)
220: Modular Run-Time Images
221: Simplified Doclet API
223: New Version-String Scheme
224: HTML5 Javadoc
226: UTF-8 Property Files
227: Unicode 7.0
228: Add More Diagnostic Commands
229: Create PKCS12 Keystores by Default
230: Microbenchmark Suite
231: Remove Launch-Time JRE Version
Selection
232: Improve Secure Application
Performance
235: Test Class-File Attributes Generated by
javac
236: Parser API for Nashorn
237: Linux/AArch64 Port
240: Remove the JVM TI hprof Agent
241: Remove the jhat Tool
243: Java-Level JVM Compiler Interface
245: Validate JVM Command-Line Flag
Arguments www.hujak.hr19 More info: openjdk.java.net/projects/jdk9/

20. JDK Profiles
www.hujak.hr20
30 MB55 MB 17 MB 11 MB

21. Java in the Cloud
www.hujak.hr21

22. Java SE Cloud Services
• For example
www.hujak.hr22

23. Java ME in the Cloud
• Java Embedded & Internet of Things Cloud Service
• Presented by Oracle at JavaOne
• Together with “Connected Car” demo
www.hujak.hr23

24. What about Java EE?
• Java EE 7 ecosystem
• Java EE 7 compatibility
• IBM WebSphere Liberty Profile
• Oracle WebLogic Server
• WildFly (RedHat)
• Cosminexus Hitachi Application Server
• GlassFish Server
• TmaxSoft TMAX JEUS
www.hujak.hr24

25. Java EE progress
• And where is currently Java EE?
www.hujak.hr25

26. Occasional Meme
www.hujak.hr26

27. Developers
• How satisfied are you with your current job?
www.hujak.hr27
0% 5% 10% 15% 20% 25% 30% 35% 40%
I hate
my job
Somewhat
disssatisfied
Neutral
Somewhat
satisfied
I LOVE
my job
2%
10%
11%
40%
36%
Source: StackOverflow Developer Survey 2015

28. Java jobs – today!
• In total, search term "Java"
• 91000+ Java jobs on
• Seniors 24000+, Architects 12000+
• NY 4700+, SF 3600+, Seattle 3500+
• AWS 2600+, CyberCoders 1900+
• 190000+ Java jobs on
• Seniors 37000+
• NY 15000+, SF 16000+
• 18500+ Java jobs in NY on
• SF 5500+
www.hujak.hr28 Source: Indeed, SimplyHired, Glassdoor, retrieved May, 2015

29. ICT graduates production
www.hujak.hr29
0
5000
10000
15000
20000
25000
30000
35000
40000
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
UK
France
Spain
Germany
Polland
"Region" *
* "Region" includes Croatia, Slovenia, Hungary, Italy, Austria, Romania, Slovakia, and Bulgaria
In Europe
Source: eSkills for Jobs 2015 – Facts and Figures, DigitalEurope.org, 2015

30. ICT in EU – Supply vs. Demand
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Demand
Supply
Linear (Supply)
www.hujak.hr30 Source: eSkills for Jobs 2015 – Facts and Figures, DigitalEurope.org, 2015
Demand Supply
2008 150.490
2009 145.074
2010 150.177
2011 155.676
2012 274.000 153.856
2013 338.000
2014 422.000
2015 509.000
2016 598.000
2017 686.000
2018 780.000
2019 855.000
2020 913.000

31. Occasional Meme
www.hujak.hr32

32. 320+ JUGs worldwide
www.hujak.hr33

33. 100+ JUGs in Europe only
www.hujak.hr34
Hrvatska udruga Java korisnika – HUJAK
Croatian Java User Association is an non-profit association of citizens,
private persons as well as representatives of legal entities, who are in their
professional, scientific or professional work involved in the development or use of
technologies related to the Java language and platform.

34. HUJAK & conferences
This is our 12th conference !!!
• 10/2011 – 1st Java Day at 16th HrOUG conference
• 12/2011 – Founding of HUJAK
• 05/2012 – 1st international Java conference in Croatia – Java 2012
• 10/2012 – 2nd Java Days at 17th HrOUG conference
• 10/2012 – 1st WebCamp conference
• 06/2013 – 2nd international Java conference – JavaCro’13
• 10/2013 – 3rd Java Days at 18th HrOUG conference
• 11/2013 – 2nd WebCamp conference
• 02/2014 – 1st community Java conference – Javantura Zagreb 2014
• 05/2014 – 3rd international Java conference – JavaCro’14
• 11/2014 – 2nd community Java conference – Javantura v2
• 05/2015 – 4th international Java conference – JavaCro’15
• 02/2016 – 3rd community Java conference – Javantura v3
www.hujak.hr35

35. And we are still growing
• Javantura v1 – 12 sessions
• Javantura v2 – 16 sessions
• Javantura v3 – 22 sessions
www.hujak.hr36
0 50 100 150 200 250 300
Javantura v1
Javantura v2
Javantura v3
150
160
300
Participants

36. Popularity – hujak.hr
• Posts: 698 + Pages: 55
• Total view: 97.000+
• 16.800+ in 2012, 25.300+ in 2013, 28.000+ in 2014,
23.300+ in 2015, 3.200+ in 2016
• Monthly max: 3.273 (Feb 2014 – Javantura v1)
• Daily max: 581 (March 5, 2015)
www.hujak.hr37

37. Javantura & JavaCro
• Javantura.com
• Total visits : 36.000+
• Monthly max: 7.601 (Feb 2014)
• Daily max: 1.363 (Nov 15, 2014) 
• JavaCro.org
• Total visits: 50.000+
• Monthly max: 9.928 (May 2014)
• Daily max: 1 686 (May 11, 2015) 
www.hujak.hr38

38. Partners & friends
www.hujak.hr39

39. 250+ individual members
Branko Mihaljević, Stjepan Matijašević, Slavko Žnidarić, Hrvoje Đurđević, Marin Orlić, Hrvoje Haramina, Danijel Kučak, Mario Žagar, Igor Čavrak, Goran Mužak, Damir
Kovačić, Damir Kropf, Nikola Ružić, Matija Tomašković, Goran Šimić, Ivan Štimac, Samir Čauš, Denis Trupec, Melita Mihaljević, Jurica Križanić, Nikolina Tomašković,
Martin Grmek, Neven Borojević, Velimir Gašparović, Goran Horak, Ivica Čardić, Eva Božić, Igor Bešlić, Vladimir Jelinčić, Ivan Klarić, Marina Čobanov, Sanja Illeš,
Tomislav Mrkus, Dražen Grabovac, Ivka Ivas, Mario Žagar, Tomislav Ćurin, Boris Matijašević, Boris Plavljanić, Josipa Šare, Hrvoje Slaviček, Duško Obradović, Marija
Kust, Boris Ševo, Darijo Kutleša, Bruno Kovačević, Zoran Rončević, Marko Klarić, Davor Ranković, Stjepan Buljat, Josip Dean, Srđan Stanić, Mihovil Rister, Ivo
Šalković, Ivan Paladin, Zvonimir Juranko, Emina Elezović, Dejan Rožić, Davor Sauer, Adnan Turić, Ladislav Mačkala, Hrvoje Jambrović, Ognjen Orel, Marko Kasović,
Dragi Raos, Tomislav Pokrajčić, Tomislav Ivanjko, Goran Kalanj, Igor Belša, Matija Capan, Estera Prendivoj, Andreja Josipović, Igor Lazić, Vedran Vetma, Marija Kušt,
Tvrtko Malkoč, Josip Pokrajčić, Martina Starman, Denis Halupa, Željko Bubičić, Ivan Senji, Ana Mandić, Nenad Crnić, Ivica Lončar, Aleksander Radovan, Veljko
Cuculić, Maja Legac, Mladen Čikara, Borut Hadžialić, Miroslav Rešetar, Bruno Babić, Saša Ivičević, Mario Gvozdanović, Nenad Bajsić, Dino Lišnjić, Duško
Vukmanović, Dino Zjača, Igor Buljan, Nikola Šaub, Dragutin Kermek, Erik Kiš, Elis Missoni, Silvije Horvat, Marko Škvorc, Blaženko Hunjet, Marko Curi, Boris Grginčić,
Domagoj Tršan, Ivan Klarić, Željko Šmaguc, Tomislav Gosarić, Barbara Carević, Marko Jurišić, Domagoj Poljak, Ivor Prebeg, Ivan Švogor, Jagor Čakmak, Tomislav
Rajaković, Janko Diminić, Mladen Uzelac, Dalibor Starčević, Nikša Marušić, Fabijan Špralja, Romana Drčić, Robert Hrženjak, Dinko Srkoč, Ivan Raguž, Bariša
Obradović, Marko Marušić, Marijo Hasanac, Ante Patačko, Zvjezdan Lice, Josip Maslać, Kruno Ričković, Ivana Jozić, Šimun Šunjić, Miljen Mikić, Marko Čavka, Hrvoje
Rončević, Krešo Papec, Ninoslav Čerkez, Ilica Brnadić, Juraj Čutić, Jure Damir, Danijel Šoštar, Andrija Jambrović, Zoran Veljanović, Mario Kamenjak, Tomislav Šebalj,
Ivan Kocijan, Vedran Bojanić, Milan Draganić, Silva Haberl, Petar Butković, Lucija Zadrija, Domagoj Stanković, Leon Rotim, Filip Januš, Mario Smolčić, Stipe Stagličić,
Ivan Vučak, Siniša Botić, Mate Križanac, Josip Marković, Pavle Crnković, Mišel Mešnjak, Filip Horvat, Ivo Majić, Branko Novaković, Željko Kunica, Željko Mikić,
Dubravko Fistrić, Šime Essert, Slaven Olujić, Filip Kaić, Miljenko Martinić, Goran Štuc, Ian Rumac, Mateo Velenik, Antonio Jedvaj, Ivan Grce, Marko Ciglar, Ivan Žanić,
Dario Šagud, Josip Kovaček, Luka Belopeta, Dorotea Šimunec, Kristijan Vrbanić, Petar Zubak, Karlo Sušanj, Darko Topić, Daniel Bele, Leonardo Bujas, Mihovil
Vidaček, Tihomir Smuđ, Dorjan Smoković, Tvrtko Malkoč, Mario Gotovac, Krešimir Jurasović, Hrvoje Crnjak, Mirko Jakovčev, Mark Marić, Božidar Đukes, Ivan Pigac,
Daniel Peruško, Slaven Hrkač, Andrej Grgurić, Mario Lanik, Robert Antonović, Antonio Diab, Sven Stubljar, Đive Jakobušić, Igor Durbek, Vladimir Adamić, Adam
Mehtić, Borna Slivar, Radovan Kainović, Tomislav Brabec, Antun Juratović, Pavao Vlahović, Matija Bečirević, Luka Bašek, Jurica Vlahoviček, Josip Golubić, Marko
Crnjac, Luka Škeljo, Andrej Balaš, Marko Golec, Sara Konjević, Tomislav Fumić, Albert Bojčić, Karlo Kovač, Dejan Pavković, Leon Španić, Davor Lozić, Alan Jagar,
Hrvoje Baić, Andrei Zvonimir Crnković, Tino Titlić, Tomislav Šantek, Tomislav Karaturović, Marko Žulić, Mateo Sokač, Duje Jurica, Luka Maglic, Armando Vucić, Ružica
Grubišić, Tomislav Ptiček, Ivan Petrović, Antonio Đurenec, Dino Horvat, Danijel Čokara …
www.hujak.hr40

40. 45+ company members
www.hujak.hr41

41. HUJAK’s activities
• General activities (as always)
• Exchange of knowledge and sharing of experiences
• Gatherings, meetups and conferences
• Help in organizing education
• Certification and testing
• Help with employment
www.hujak.hr42

42. Java Certification
• Help with Java Certification
• Java SE – OCA, OCP, OCM
• Java EE – OCE, OCM
• Site section about certification at HUJAK site
• hujak.hr/certifikacija
• Study groups (Java 8 related)
• Special session at JavaCro'15 
• Big thanks 
• Aleksander Radovan, Tihomir Smuđ, Jurica Križanić, Lucija
Zadrija, Lovro Pandžić, Milan Draganić, Hrvoje Đurđević …
www.hujak.hr43
Your Name 

43. Interesting conferences
• droidcon conference
• DORS/CLUC conference
• CROZ QED conference
• Infobip Dev Days conference
• JavaCro’16 conference (5th!)
• HrOUG conference (21st!)
www.hujak.hr44

44. droidcon 2016
• April 27-29, Zagreb – droidcon.hr
www.hujak.hr45

45. DORS/CLUC 2016
• May 11-13, Zagreb – 2016.dorscluc.org
www.hujak.hr46

46. JavaCro’16
• May 18-20, Rovinj – 2016.javacro.hr
• 250+ attendees, 50+ sessions, 2+ days
• Call for Speakers is open!!! (until March 23rd)
www.hujak.hr47

47. Javantura Sponsors
• And now … lightning talks from our sponsors
www.hujak.hr48

52. Instead of conclusion
Call for participation
• HUJAK needs your help in:
• Everyday life of our JUG
• Organizing meetups and workshops
• Organizing conferences
• Education and certification
• Employment-related activities
HUJAK is YOU!
www.hujak.hr53

53. Thank you & greetings
from HUJAK!
• Web page hujak.hr
• www.hujak.hr
• LinkedIn group HUJAK
• www.linkedin.com/groups?gid=4320174
• Facebook group page HUJAK.hr
• www.facebook.com/HUJAK.hr
• Twitter profile @HUJAK_hr
• twitter.com/HUJAK_hr
www.hujak.hr54

54. And now … T-shirts Toss
www.hujak.hr55