- A Two-Wheel Self-Balancing Robot: JBalancePI
- Tools and Methodology for Cloud
- Get Involved with Java Standards!
- Java Day Tokyo Keynote
- HTTP 2 and Web Development
- Migrating from Desktop to Cloud-Native Web Applications
- New Java Champion Simon Ritter
- New Java Champion Matt Raible
- New Java Champion Sebastian Daschner
- Convert an OpenJFX App to Mobile
Thursday Jan 31, 2013
Wednesday Jan 30, 2013
By Yolande Poirier-Oracle on Jan 30, 2013
His Devoxx talk about Nashorn is now freely accessible at Nashorn - implementing dynamic languages on the JVM
Marcus Lagergren's twitter handle is @lagergren. Nashorn blog has the latest on the project
By Tori Wieldt-Oracle on Jan 30, 2013
Join the Bay Area Scala Enthusiasts Feb. 14th in Santa Clara, California to hear how Scala and the JVM work well together. Ever wonder what goes on below the arrows, double colons, and tildes of Scala's syntax? What changes must be made to the JVM and compiler to allow for higher order functions, Actors, and pattern matching? What low level engineering feats will be required for Scala and Java to truly interoperate? Come hear two speakers very close to the thinking and understanding of what goes in to making powerful functional programming features a reality on the JVM.
JVM Evolution for Higher-Order Languages
Alex Buckley, Specification Lead, Java Language & VM, Oracle.
A Rising VM Lifts All Boats
Paul Phillips is the most prolific contributor to the Scala compiler and a co-founder of Typesafe.
JVM Evolution for Scala @ Oracle Santa Clara
(You need to go to the Bay Area Scala Enthusiasts page to register!)
Thursday, February 14, 2013
6:30 to 9:00 pm
Oracle Santa Clara Campus Auditorium
4030 George Sellon Circle (Building 3)
Santa Clara, CA (map)
OTN Article: Java Champion Dick Wall on the Virtues of Scala
OTN Article: Java Champion Jonas Bonér Explains the Akka Platform
Monday Jan 28, 2013
By Tori Wieldt-Oracle on Jan 28, 2013
The Jan/Feb issue of Java Magazine is focused on embedded, and we explore why Java is the best language choice for embedded development. It includes:
Java Nation - Get the news from JavaOne Brazil, Devoxx, and more.
Embedded Everywhere - Terrence Barr talks about Java and the Internet of Things.
Top Ten Reasons for Using Java in Embedded Apps - Simon Ritter explains why Java is the best language for embedded development.
Java Arrives on a $25 Board - Meet Raspberry Pi Foundation Cofounder Eben Upton.
JCP Executive Q&A - Credit Suisse Susanne Cech Previtali and Victor Grazi share Credit Suisse’s distinctive perspective.
Demystifying invokedynamic -Julien Ponge shows you how to use invokedynamic in your code.
Integrating Web and Java Client Applications with Social Media - Johan Vos gives you the scoop on integrating your applications with social media.
Java Magazine is a FREE, bi-monthly, online publication. It includes technical articles on the Java language and platform; Java innovations and innovators; JUG and JCP news; Java events; links to online Java communities; and videos and multimedia demos. Subscriptions are free.
Do you have feedback about Java Magazine? Send a tweet to @oraclejavamag.
By Tori Wieldt-Oracle on Jan 28, 2013
Java Evangelist Stephen Chin has started his Nighthacking Tour across the Nordic region. From Jan 25th to Feb 7th, he will be visiting Java User Groups, interviewing developers, live streaming and posting video along the way. Catch the events live or afterwards at nighthacking.com.
Here is the current schedule -- BE SURE TO VERIFY TIMES AND REGISTER IF NECESSARY AT NIGHTHACKING.COM.
|Tuesday, Jan 29||17:00||Javaforum NightHacking with Niclas Nilsson|
|Wednesday, Jan 30||17:30||FooCafe NightHacking with Par and Martin|
|Thursday, Jan 31||17:00||NightHacking with Werner Keil|
|Friday, Feb 1||15:30||Hacking at ZeroTurnaround with Jevgeni and Anton|
Monday, Feb 4
NightHacking at Vaadin with Joonas, Artur, Sampsa, and Martijn
Tuesday, Feb 5
JFokus Interviews: TBD
James Gosling : Robots and Oceans with Liquid Robotics
Java Posse Live!
|Wednesday, Feb 6||11:30||More JFokus Interviews: TBD|
You can join Stephen for the journey by watching the live stream in 3 easy steps:
- Follow @steveonjava on Twitter to find out when the broadcast is live.
- Come to the NightHacking UStream Channel to watch the free live feed.
- Interact with Stephen Chin and folks he is hacking with via twitter using hashtag#nighthacking.
Thursday Jan 24, 2013
By Yolande Poirier-Oracle on Jan 24, 2013
"The Java Platform is huge and, to a lot of people, it is too big" explained Cecilia. "OpenJDK is divided into 22 different groups and 40 different projects to make it easy to participate." She recommends starting small by "subscribing to one of the mailing lists at openjdk.java.net" and contributing small bug fixes, for example. It is important that contributors learn as much as possible and pick a project that feels right for them.
"The idea of Adopt-a-JSR is to have ordinary Java developers get involved with the creation of standards" indicates Martijn. "Adopt-a-JSR is about Java EE and ME standards." "The work on the Java language and the JVM is done as part of OpenJDK and Adopt OpenJDK projects," Verburg continues. He outlines how to start on those projects. Contributors can be individuals but also JUG leaders, who organize coding events to work on Java standards.
By Janice J. Heiss on Jan 24, 2013
In a new article, now up on otn/java by yours truly, titled “Coding on Crete: An Interview with Java Specialist Heinz Kabutz,” noted Java commentator and consultant Dr. Heinz Kabutz shares insights about the Java platform and talks about his exotic life working as a developer on the island of Crete. Kabutz is well known as the author of the Java Specialists’ Newsletter which reaches some 70,000 developers worldwide.
In a previous 2007 interview, Kabutz lamented the large number of developers who do not engage in unit testing. He offered an update on this:
“The one place where unit testing is sorely lacking is with concurrent code. There are some tools that help find race conditions and deadlocks, but they typically find about a dozen faults per line of code. With such an amount of false positives, discovering a real problem is impossible.
Did you know that there is not a single—not even one—unit test for the Java Memory Model (JMM)? We have to just accept that it works on the Java Virtual Machine (JVM) we are running on. The theory is that if we write our Java code according to the JMM, the code will run correctly on any certified JVM. Unfortunately, the certification does not test the JMM thoroughly. Apparently, there are some tests for the java.util.concurrent classes, and so they assume that if these work, then the JMM must also be correct for that JVM.”
When asked about the greatest performance issues he remarked:
“The biggest performance issue today is still that we often cannot pinpoint the bottlenecks. Customers usually approach us with problems that they have not been able to solve, no matter how many man-months they've thrown at them. The most recent issue I looked at boiled down to a simple race condition. If two threads insert an entry into a shared HashMap at the same time, and the key's hash code points to the same entry in the table, then the HashMap can be corrupted and you might get two entries pointing to each other. This means that whenever you try to call contains() on the map, you risk getting an infinite loop.”
Check out the article.
By Tori Wieldt-Oracle on Jan 24, 2013
From Jan 25th to Feb 7th, Java Evangelist Stephen Chin will be traveling across the Nordic countries and doing live video streaming of the journey. Along the way he will visit user groups, interview interesting folks, and hack on open source projects. The last stop will be at Jfokus 2013.
Wednesday Jan 16, 2013
By Tori Wieldt-Oracle on Jan 16, 2013
Several Java User Group (JUG) leaders participated in the Oracle User Group Leaders' Summit this week at Oracle HQ. The International Oracle User Group Community (IOUC) is a community of leaders representing Oracle users groups worldwide. Members include leaders from over 900 Oracle user groups, and leaders from communities focused on Java, MySQL and Solaris. Over 100 User Group leaders came to User Group Leaders' Summit for three days to learn about Oracle products and technologies, provide feedback to product groups, network, share best practices, and enjoy the brisk California weather.
In the dedicated Java track, Oracle Java experts presented the current state and roadmaps for Java SE, JavaFX, Java EE, Java ME, and Java Embedded. Java Evangelist Arun Gupta discussed the features in the upcoming Java EE 7 release. Mike Lehman, Senior Director of Product Management, gave an overview of Oracle's Java Cloud offering and gave a demo. There were also sessions on Java.net, OTN, and Java Magazine. Throughout the sessions, JUG leaders were encouraged to provide feedback, and they weren't shy! They gave several suggestions about features, processes, and programs.
At the session on the JCP, JCP Executive Committee member and long-time Java community member Bruno Souza spoke about the Adopt a JSR program. "The biggest job in Adopt a JSR is education. Many people say, "I want to help…what's the JCP?"" He said that even small actions can have a big impact, and contributors don't have to be experts. "Just reading a spec can make a difference. The more people who read and comment on a spec, the better it is," Bruno explained. JCP Executive Committee member and leader of the London Java Community (LJC) Ben Evans discussed Adopt OpenJDK [Editor's Note: Stay tuned to this blog for more information about Adopt OpenJDK].
Jim Bethancourt, Houston JUG leader, was at the Summit for the first time. "This has been a great experience," he said, "I've got a lot of good information to take back to my JUG and also my company." (He has already posted the slides on his JUG's website!) Bert Ertman, leader of the Netherlands JUG, comes to the summit as much for the networking as the sessions. "It's great to spend time with other JUG leaders and share ideas about fostering community growth and participation" he said.
By Yolande Poirier-Oracle on Jan 16, 2013
Johan Vos is the co-founder and CTO of LodgOn, a company focused on “Java software for enabling communities.” In an interview, he shares his experience creating applications with JavaFX for the front-end and Java EE in the back-end. For one of clients, he created a badge-based rewarding system, which tracks user participation in social media and at events.
He sees a wealth of opportunities with JavaFX as client development platform and with Java EE as a back-end. The challenge lies in “how you can connect the back-end servers with small devices like tablets, phones and embedded devices.” The opportunity is that “they have one thing in common which is Java”
A member of the GlassFish community, he considers JAX-RS 2.0 as an essential technology and standard. “REST interfaces and the JAX-RS API provide a standard that allows back-end applications to connect with any front-end clients”. He created the open-source project DataFX, “a JavaFX client that connects to any REST based back-end” and the open-source framework DaliCore that manages social media resources in Java EE applications.
Watch the video interview
Insider News from the Java Team at Oracle!