java.net Communities

JavaTools Community Newsletter - Issue 139
The latest edition, issue 139, of the Java Tools Community newsletter is out, with tool news from around the web and from community projects, announcements of new projects in the community, and a Tool Tip summarizing Daniel Lopez's eight-part "Scripting Away with Java 6" series, in which he experiments with different scripting languages on the JVM.

Introduction to Grizzlets
Jean-Francois Arcand's Blog offers an introduction to Grizzlets, a small API that lets you write Comet-style Ajax applications more easily. He writes that rather than expecting developers to create their own Comet implementations with Servlets, "it would be much more simple if we can write a single POJO class, hook it to an Ajax client, and bang make it work! So here comes Grizzlet, an extremely simple POJO based approach to write Comet based application!" In a code example, he shows that Grizzlets are POJOs, implementing a single Grizzlet interface.

Mixing property language support and bean bindings:
forax from JDK   (September 24, 2007 03:14:23 PM PST)

NetBeans Day - Rome 2007:
arungupta from Java Tools   (September 24, 2007 02:15:36 PM PST)

VisGraph: Visualization of Math functions: During my work on LinAlg API which is going to be completed this year with Milestone 2 i have started developing a simple API for visualizing math functions and objects like Vectors or Points.
alexanderschunk from JDK   (September 24, 2007 01:09:32 PM PST)

How to Handle Java Finalization's Memory-Retention Issues
A recent SDN article has some guidance on How to Handle Java Finalization's Memory-Retention Issues. It shows several memory-related problems that can prop up in finalizable objects, and makes the case for a weak references-based approach to clean-up. It also advocates depending on finalization only when absolutely necessary, as "finalization is a nondeterministic -- and sometimes unpredictable -- process. The less you rely on it, the smaller the impact it will have on the JVM and your application."

Java-AppleScript Connector Update
The Mac Java Community checks out a new version announcement from the Java-AppleScript Connector project. "I have updated jasconn and its project site. jasconn now includes a so-called ScriptEngineBrowser which shows quite a bit of information about any installed JSR-223 compliant script engine. It also contains a rudimentary editor which you can use to test scripts. I am going to enahnce the browser throughout the following months. jasconn itself received minor bug fixes and a few enhancements. Most importantly, it no longer does a System.err.println when an exception ocucrs but throws a proper ScriptException instead."

NetBeans Profiler 6.0 Beta 1
The NetBeans Profiler Blog notes their team's contribution to the just-released NetBeans 6.0 Beta 1: an integrated profiler. "The NetBeans IDE 6.0 Beta 1 has just been released including the integrated profiler. [...] These are major new features in NetBeans Profiler 6.0: Profiler integrated into NetBeans IDE, profiling points, heap walker, dynamic attach on JDK 6.0, DrillDown graph, and JMeter integration." More information is available at the NetBeans Profiler 6.0 Beta 1 page.

Filthy Rich Clients excerpt and review
InfoQ has posted a review and excerpt from Filthy Rich Clients, the new book by Chet Haase and Romain Guy. Reviewer Andy Roberts writes, "the term "Filthy Rich Clients" was only coined relatively recently by the authors to describe "applications that are so graphically rich that they ooze cool. [...] In short, they make users actually enjoy their application experience". With that in mind, the book goes on to explain how to utilise Java2D and Swing in order to enhance your desktop applications."

HotSpot JVM Talk at Intel IDF
David Dagastine blogs that he'll be presenting a Sun HotSpot JVM Talk at Intel IDF today in San Francisco. "'ll be presenting tomorrow at Intel Developer Forum in San Francisco with an esteemed colleague from Intel, Kingsum Chow. The session is SSGS003: "How to Get the Most Performance from Sun JVM on Intel Multi-Core Servers"." Along with an overview of how HotSpot takes advantage of current and future Intel multi-core CPU's, the talk will offer "a look at how to select JVM parameters for your application to get the most performance, and at employing VM parameters tuning as a last resort."

Defining Your Object Model with JPA
In Defining Your Object Model with JPA, Chris Maki walks through a blog's object model with JPA, using mapped superclasses and entity listeners to provide functionality that you might not have thought of. He starts off with some simple requirements of the object model, and then fulfills them -- including some requirements that a DBA might offer, such as column names.

Jonathan Knudsen Java ME Tutorial at ooPLSA
As noted on the Mobile & Embedded Community page, Kicking Butt with MIDP and MSA author Jonathan Knudsen will be delivering a 3.5-hour tutorial, Using Java ME to Program Your Mobile Phone, on October 21 at ooPSLA in Montréal. "This tutorial provides an overview of the world of Java ME and provides a swift course in the basics of Java ME application programming. Participants will learn how to create an application, how to build a user interface, how to connect to the Internet, and more."

View Projects & Communities Archive