Wednesday Mar 05, 2014

JavaOne 2014 Call for Papers Now Open!

It is time to submit all those talks you have been thinking about. "We have a huge focus on community at this event, and it would be great to have many proposals from the developer community." explains JavaOne Content Chair Stephen Chin.

There is a new dedicated track for Agile development this year, making a total of nine Java tracks.  This year's tracks are: 

• Clients and UI
• Core Java Platform
• Internet of Things
• Java Virtual Machine Languages
• Java and Security
• Tools and Techniques
• Server-Side Java
• Java in the Cloud
• Agile Development

There is no time to waste! The call for papers closes April 15th at 11:59 p.m. PDT  

You will receive a complimentary pass to JavaOne with an accepted talk.

There is a rolling submission process, so submit early! 

Thursday Dec 19, 2013

Java Rocks More Than Ever

In a series of blogs full of technical detail and cross-platform comparison, senior developer Geert Bevin from ZeroTurnaround gives 10 reasons why Java is a great technology. He built software for musical instruments using C++, with Juce Library and CPython, and realized that he missed a lot from the Java ecosystem.

He has written the first six blogs, which include Java Compiler, the core API, Open Source, the Java Memory Model, HighPerformance VM and Bytecode. In his first blog about Java Compiler, he gives examples and recommendations on how to use the JVM's just-in-time, the compiler code versus the architecture, runtime rather than static or dynamic linking. 

Upcoming topics include: 
Intelligent IDEs
Profiling Tools
Backwards Compatibility
Maturity With Innovation

Friday Sep 13, 2013

An Interview with Venkat Subramaniam before JavaOne

JavaOne Rock Star and Java Champion, Venkat Subramaniam, sees a lot to be excited about with regard to Java.[Read More]

Friday Sep 06, 2013

JavaOne 2013 with Markus Eisele: Sins and Security in Java EE

Markus Eisele shares his expertise on Java EE.[Read More]

Wednesday Aug 07, 2013

Garbage First Garbage Collector Tuning

A new article, now up on otn/java, titled “Garbage First Garbage Collector Tuning,”
by Monica Beckwith, Principal Member of Technical Staff at Oracle, and performance lead for the Java HotSpot VM's Garbage First Garbage Collector (G1 GC), shows how to adapt and tune the G1 GC for evaluation, analysis, and performance.

As Beckwith explains, the Garbage First Garbage Collector is the low-pause, server-style generational garbage collector for Java HotSpot VM. It uses both concurrent and parallel phases to achieve its target pause time and maintain good throughput. A garbage collector is a memory management tool. When G1 GC determines that a garbage collection is necessary, it first collects the regions with the least live data – known as garbage first.

Beckwith describes the collection phases and marking cycles, lists default tuning devices, offers recommendations about how to fine tune and evaluate garbage collection, and shows how to respond to overflow and exhausted log messages.

She concludes her article as follows:

“G1 GC is a regionalized, parallel-concurrent, incremental garbage collector that provides more predictable pauses compared to other HotSpot GCs. The incremental nature lets G1 GC work with larger heaps and still provide reasonable worst-case response times. The adaptive nature of G1 GC just needs a maximum soft-real time pause-time goal along-with the desired maximum and minimum size for the Java heap on the JVM command line.”

Check it out here.

Wednesday Jun 26, 2013

Diving into Scala with Cay Horstmann

A new interview with Java Champion Cay Horstmann, now up on otn/java, titled  "Diving into Scala: A Conversation with Java Champion Cay Horstmann," explores Horstmann's ideas about Scala as reflected in his much lauded new book,  Scala for the Impatient.  None other than Martin Odersky, the inventor of Scala, called it "a joy to read" and the "best introduction to Scala". Odersky was so enthused by the book that he asked Horstmann if the first section could be made available as a free download on the Typesafe Website, something Horstmann graciously assented to.

Horstmann acknowledges that some aspects of Scala are very complex, but he encourages developers to simply stay away from those parts of the language. He points to several ways Java developers can benefit from Scala:

"For example," he says, " you can write classes with less boilerplate, file and XML handling is more concise, and you can replace tedious loops over collections with more elegant constructs. Typically, programmers at this level report that they write about half the number of lines of code in Scala that they would in Java, and that's nothing to sneeze at. Another entry point can be if you want to use a Scala-based framework such as Akka or Play; you can use these with Java, but the Scala API is more enjoyable. "

Horstmann observes that developers can do fine with Scala without grasping the theory behind it. He argues that most of us learn best through examples and not through trying to comprehend abstract theories. He also believes that Scala is the most attractive choice for developers who want to move beyond Java and C++.  When asked about other choices, he comments:

"Clojure is pretty nice, but I found its Lisp syntax a bit off-putting, and it seems very focused on software transactional memory, which isn't all that useful to me. And it's not statically typed. I wanted to like Groovy, but it really bothers me that the semantics seems under-defined and in flux. And it's not statically typed. Yes, there is Groovy++, but that's in even sketchier shape.

There are a couple of contenders such as Kotlin and Ceylon, but so far they aren't real.

So, if you want to do work with a statically typed language on the JVM that exists today, Scala is simply the pragmatic choice. It's a good thing that it's such a nice choice."

Learn more about Scala by going to the interview here.

Thursday Apr 04, 2013

Golo – A Lightweight Dynamic Language for the JVM

Julien Ponge, who, in addition to being a Java developer and a professor, also writes technical articles for both otn/java and Java Magazine, has created Golo, a simple, dynamic, weakly-typed open source language that favors the explicit over the implicit. Developers can pick it up in a manner of hours, not days. Responses to its recent release at Devoxx have been favorable.

Built from day 1 with invokedynamic, and currently in beta, Golo takes advantage of the latest advances of the JVM. It is also a showcase on how to build a language runtime with invokedynamic.

The Golo Programming Guide is located here.

Julien is an Associate Professor (Maître de Conférences) in Computer Science and Engineering at INSA-Lyon in France, plus an R&D Computer Scientist at the CITI / INRIA laboratory. Learn more about him here.

Thursday Feb 21, 2013

Register Now for Devoxx UK and Devoxx France 2013

There's only a little over a month to go before Devoxx UK on March 26 and 27 in London and Devoxx France on March 27 to 29 in Paris. The conference schedules are up and space is tight, so register today before they are sold out!

"Cloud, architecture and security" is a new conference track this year. Other tracks are Java SE, methodologies, Java EE, web & big data, new languages on the JVM, and future Devoxx. Developers will get a shot at peer discussions in Bird-of-a-Feathers, learn tips and tricks during quickies and get in-depth technical information in hour-long talks or in the three hour hands-on-labs.  "You could learn something that will help in your day job. Maybe it's a better use of patterns, technologies or methodologies you're utilizing right now" explains Trisha Gee, one of the Devoxx organizers

The conference also presents great networking opportunities with leaders in the Java community and renowned speakers who wrote popular technical books. Some of those well-known speakers are Kirk Pepperdine, Peter Pilgrim, Stephen Chin, Arun Gupta, and Markus Eisele, just to name a few.

Oracle is a European Platinum Partner of the three Devoxx conferences in the U.K., France and Belgium. Come and join us in London and Paris next month.

Wednesday Jan 30, 2013

Nashorn, the JavaScript Implementation in Java 8

In this Interview, Marcus Lagergren, who works on the dynamic language team at Oracle, discussed the Nashorn project.  "Nashorn is the JavaScript runtime based on InvokeDynamic for the Java Virtual Machine (JVM)" he explains. The Nashorn project is now part of the OpenJDK

The performance is much better than its predecessor Rhino. "We totally blow it out of the water now that we have specific tools to run other things than Java on the JVM." Marcus commented. "The pluggability between JavaScript and Java is another good thing" he added.

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

A Rising VM Lifts All Boats: Bay Area Scala Meeting

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.

Details
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)

Scala Resources
OTN Article: Java Champion Dick Wall on the Virtues of Scala 
OTN Article: Java Champion Jonas Bonér Explains the Akka Platform

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