Wednesday May 06, 2015

Think Functional With Java 8

Want to master parallel programming in Java 8? The syntax of Lambda Expressions is fairly simple. How Lambdas and the Streams work together is not as straightforward. Both features introduce a functional style of programming into Java for the first time.  In his Virtual Technology Summit session, Simon Ritter will explain how to rethink the way you program with functional programming and Java in mind.  He will use real world examples to show how to write functional code in Java and what things to avoid. Join him for this session at the next Virtual Technology Summit (VTS).  

We are celebrating 20 years of Java and innovations with Reactive Java EE, Java 8 Lambdas and IoT projects. The VTS is an interactive, online event, sponsored by the Oracle Technology Network (OTN). VTS is free, but you must register.  Join us for one of these exclusive events in your time zone:  

EMEA - May 12 - 9am to 12:30pm GMT
APAC - May 19 - 3pm to 6:30pm AU/SYD

Register now. The event is free 


Tuesday May 05, 2015

Improving the Performance of Java EE Applications

In a recent article for Java Magazine, Josh Juneau makes a strong case for incorporating performance tuning into the development lifecycle. In addition to preventing 'nightmare' scenarios in which the application development team must make critical performance tuning changes directly to a live production environment while 'under the gun,' proactively tuning applications for performance before they are released to production can help you plan for user capacity. Also, because the top performance problems experienced with Java EE applications are often related to configuration and environment issues, proactive tuning can make troubleshooting easier by differentiating problems in the code from problems with configuration or the environment.

Josh provides valuable information about how to code for performance and tune the environment. In addition, he discusses how to use profiling tools, such as NetBeans profiler and Apache JMeter, to plan for capacity by forecasting how an application will perform in production under a normal or heavy load of users.

Finally, because further improvements can often be made to an application in production--even if you proactively tune during development--Josh provides some tips for reactive performance tuning. 

Wednesday Apr 29, 2015

Lessons Learned from UML NetBeans Plugin Development

By Guest Blogger Zoran Sevarac

The Open Source Software Development Center at University of Belgrade has released a new version of a UML plugin for NetBeans called easyUML. This plugin was created to facilitate the use of UML tools for teaching software design, but it is also a handy tool for developers. It helps developers with commonly used features by adding an easy-to-use UI.

 EasyUML supports class diagrams and the following features:
Drawing class diagrams
Generation of Java code from class diagrams
Reverse engineering from Java code to class diagrams

The easyUML plugin is available for installation directly from NetBeans IDE Update Center, or as a  download from NetBeans Plugin portal.
Complete source code is available from SVN repository on java.net

The developers who participated in this project were software engineering students from University of Belgrade. This is a very good model for collaboration between universities and open source projects which can help overcome the gap between academia and requirements in the software industry. 
Quick demo and installation instructions are available in this YouTube video

Pictures below show the main application window with all its components common to IDE: diagram view, palette, properties view, explorer view and project view.

Tuesday Apr 21, 2015

JavaOne Registration Now Open

The JavaOne conference brings together Java experts and enthusiasts for an exceptional week of learning and networking focused entirely on all things Java. With more than 500 sessions, you will learn from the most innovative and diverse Java content. You can't afford to miss it! October 25-29, 2015, San Francisco. Register now!

With a full conference pass, you get:
Access to more than 500 JavaOne sessions, Birds-of-a-Feather (BOF) sessions and JavaOne Hands-on Labs (HOLs)
Keynote sessions for JavaOne and Oracle OpenWorld
Scene and Be Heard presentations
Java User Group Forum
Exhibition Halls at JavaOne and OpenWorld
 • Access to the Java Hub 
JavaOne Welcome Reception
Oracle Appreciation Event
Specials at the JavaOne and Oracle OpenWorld Bookstores
Access to the It’s a Wrap! party

The call for proposals is open until April 29. If your session is accepted, you will receive a full pass
You will save $600 with the Super Saver rate, if you register before May 31
Register between 5 to 13 attendees and receive a savings of up to 20 percent off the price of each registration. Register 14 or more attendees and receive a savings of up to 28 percent off.
Employees of a national/federal, state, provincial, or local government entity, including public higher education institutions can benefit from government rate

Wednesday Apr 15, 2015

How to Contribute to the Java Platform

In this interview, Heather Van Cura gave an update about JCP. She mentioned new JSRs for Java EE 8, and Java SE 9, and discussed changed to JCP.next

Community members Simon Maples, Mani Sarkar, and Daniel Bryant pesented a vJUG session about the Adopt OpenJDK project. They describe how to contribute to OpenJDK project. Mani presented a hands-on demo on how to contribute to Java 9  Learn more

Tuesday Apr 14, 2015

Perspectives on Docker

Want to know why and how to use Docker? Docker is a popular tool to build and deploy applications across environments. In these three interviews, you will learn about the benefits of Docker, its integration with other tools, and teams using the tool for different applications.

Jfrog CTO and co-founder Yoav Landman explains the use of Docker with Chef, and Vagrant in the development of a Bintray application. 


Conference speaker Matthias Grüter explains why Docker works well with the JVM 


Conference speaker Roland Huss discusses the benefits of integration tests. 


Monday Apr 13, 2015

Devoxx France 2015 Explores The Future of Technology

2500 developers attended 4th Devoxx France this year, an increase of over a thousand attendees from last year. The organizers announced a new member of the Devoxx family: Devoxx Morocco, a conference that will take place in Casablanca during the third week of November.

In this 20th year of Java, the theme of Devoxx France 2015 was about innovations in technology over the next 20 years. In his keynote, Java architect Brian Goetz described a development approach that keeps up with the technical needs of developers. Java 9 will deliver a modular platform tuned to hardware requirements. CEO Quentin Adam of Clever Cloud considers that engineering roles are entering an age of specialization. Dan Allen, an open source advocate, author, and world renowned speaker, discussed the responsibility of developers to preserve digital information for future generations. CCO Stephan Tual discussed Ehereum, an open source and decentralized platform allowing the creation of P2P businesses with new infrastructure, communication and privacy.

Rodolphe Gelin, research director of Aldebaran, explains that Romeo, a new line of humanoid robots will become a companion capable of understanding emotions and anticipate situations in the every day life. “Robots are an additional platform for development” he commented. Pierre Yves Oudeyer, research director at INRA, discussed cutting-edge artificial intelligence research, in which robots are programmed to be curious and learn by experimenting like children. They become aware of themselves and their environment. They can even develop their own language. The humanoid robot Poppy is an open source robot for laboratories and research centers to collaborate on the artificial intelligence project. Eric Filiol, the head of ESIEA research lab called on developers’ civic responsibility to educate politicians who are passing laws about internet, and privacy without understanding technology. He made the room laugh when he suggested that “after Devoxx4Kids, we really need a Devoxx4politicians.”

All the keynote speakers agreed that no one can predict the disruptive technologies in the next 20 years like no one could have predicted the internet and its ubiquity in our lives today. Again this year was Seed Networking, where developers, startups and venture capitalists discuss business opportunities. New this year was the Café Philo to discuss about the digital world and the future of society. Devoxx4kids took place last Saturday. 50 kids were learning Java using Scratch and Lego Mindstorms.

Thursday Apr 09, 2015

Devoxx France and 20 years of Java

In this interview, Antonio Antonio Goncalves talks about the 4th edition of Devoxx France. The keynote speakers this year discusses the next 20 years of Java 

Tuesday Apr 07, 2015

Devoxx France 2015

Taking place this week April 8 to 10 in Paris is Devoxx France, one of five Java developer conferences in Europe. The conference is in English and French and all the sessions will be available on Parleys website a couple of weeks after the conference. 

This year, Oracle is a Platinum sponsor. Check out the Oracle Java sessions:  

Java Mission Control for Earthlings
April 9, 15:10 - 16:00
James Weaver, Consulting Member of Technical Staff, Oracle

Java 9 Plan
April 9, 16:35 – 17:25
Brian Goetz, Java Language Architect, Oracle
Paul Sandoz, Software Developer, Oracle

Java EE 7 Batch Processing in the Real World
April 9, 17:40 - 18:30, Neuilly 252 AB
David Delabassee, Software Evangelist, Oracle

Java 8 EE, A Snapshot Overview
April 9, 17:40 - 18:30, Neuilly 252 AB
David Delabassee, Software Evangelist, Oracle

Java EE Birds of Feather Session
April 9, 20:30 – 21:30, Neuilly 252 AB
David Delabassee, Software Evangelist, Oracle

Domotique et Java, Birds of Feather Session
April 9, 21:30 – 22:30, Paris 202-203 Lab
David Delabassee, Software Evangelist, Oracle

Batch API (JSR 352) Hands-on Lab
April 10, 11:00 – 13:50, Paris 224M-225M Lab
David Delabassee, Software Evangelist, Oracle

Project Jigsaw
April 10, 14:05 – 14:55, Maillot
Paul Sandoz, Software Developer, Oracle

IoT, Java, and Autonomous Drones
April 10, 14:05 – 14:55, Room: Amphi Bleu
James Weaver, Consulting Member of Technical Staff, Oracle

Finally, Security API JSR 375
April 10, 15:10 – 16:00, Room: Paris 241
Alex Kosowski, Principal Member of Technical Staff. Oracle

If you attend the conference, please swing by booth #P04 and chat with Java experts who will be onsite answering questions.

Java Day Tokyo 2015

by Guest Blogger Stephen Chin

Java Day Tokyo is the largest Java conference in Asia with a very long history of supporting the local Java community. We will be live streaming interviews from the conference with noteworthy Java community speakers from Japan. Join the live stream at: http://nighthacking.com/

Java Day Tokyo はアジア地域の中で最も大きなカンファレンスです。今回、日本から Java コミュニティの著名な方々をお招きし会場からインタビューの生ストリーミング配信を行います。ストリーミングはこちらからご覧いただけます。
http://nighthacking.com/

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