Java Archive

JNode 0.2.5 Released

"After nearly a year of hard work the JNode team is proud to announce the release of JNode 0.2.5, the new intermediary development version of the JNode operating system. JNode is a free, open source Java technology base OS written fully in Java language (with a very small assembler nano-kernel). This release features OpenJDK integration, Java 6 support, substantially impoved consoles, experimental support for isolates and a large set of bug fixes and improvements to all parts of the system, including better memory mamagement and increased performance."

Fully Time Deterministic Java

For cost reasons the space agency is more and more interested in using Java for safety-critical missions. Until recently the lack of a time-predictable standard library has been a major hurdle to Java adoption in that particular field. It is no more the case as demonstrated by this AIAA (American Institute of Aeronautics and Astronautics) paper presented the first day of the Space 2007 conference (Long Beach, CA) and introducing the first fully time-deterministic (and open-source) library for Java: Javolution.

JavaFX, JavaFX Script: What Is It?

"I recently gave a presentation at the Portland Java Users Group about Java FX. After talking to some of the fine members of PJUG I realize that there is a lot of confusion about JavaFX and JavaFX script. JavaFX Script is just one part of the larger JavaFX umbrella. In fact, you don't even have to use JavaFX Script to gain many of the benefits of JavaFX! This weblog posting is my attempt to clear up a few things and get you excited about the future of client Java. After reading it I hope you will come away with a better understanding of what JavaFX is and why we created it."

Fedora Includes Sun OpenJDK/GNU Classpath Fusion IcedTea

Just in time for Fedora 8 test 2 IcedTea has landed in Fedora RawHide. The IcedTea project provides a harness to build the source code from the Sun OpenJDK project using Free Software build tools (gcj) and provides replacements for the non-free binary plugs with code from the GNU Classpath project. Installing this experimental GPL Java platfom is now as easy as yum install java-1.7.0-icedtea. In addition, Sun has promised to provide a Test Compatibility Kit soon so people can see how 'officially Java' this package really is.

Better OS X Java with Eclipse

Mac OS X is a powerful platform for Java development. While the Java development environment is fully integrated into Mac OS X, the Eclipse integrated development environment brings a fully integrated Java development environment to Mac OS X that provides a consistent cross-platform experience. This article shows you how to use this environment to import existing Xcode projects into Eclipse, tweak key bindings, and integrate Eclipse with the Mac OS X-bundled Concurrent Versions System.

Take Charge of Your Architecture

The architecture you think you have is often different than what you actually have. It's time to take charge of your architecture and learn how you can discover deviations by writing tests using JUnit, JDepend, and Ant to discover problems proactively instead of long after the fact.

Free GNU Classpath/OpenJDK Hybrids Appear

Red Hat just made it possible to bootstrap OpenJDK using only Free Software by building on top of gcj and replacing the binary blobs with code from GNU Classpath. The result is called IcedTea. IKVM also made a GNU Classpath/OpenJDK hybrid making it possible to run parts of the OpenJDK class libraries on mono and .net. And finally the Cacao team released a new version of Cacao that can use either GNU Classpath for a full J2SE implementation or that uses the Sun GPL J2ME libraries, including jits for lots of different architectures (alpha, arm, mips, ppc, ppc64, x86 and x86_64).

Sun Open Sources Java

Sun Microsystems has announced the release of an open-source version of its Java Development Kit for Java Platform Standard Edition. Sun has contributed the software to the OpenJDK Community as free software under the GNU GPLv2. Sun also announced that OpenJDK-based implementations can use the JCK (Java SE 6 Technical Compatibility Kit) to establish compatibility with the Java SE 6 specification. OpenBSD has already started importing the release.

GNU Classpath 0.95 ‘Take Five’ Released

"Full merge of 1.5 generics work. Bootstrappable with OpenJDK javac compiler. URLConnection timeout support. TimeZone can use platform zoneinfo file when available. The Collection classes, lang.management and util.spi have been updated to 1.6. Addition of 1.6 ServiceLoader. Speedup for cairo and freetype Graphics2D support. The ASM library is now included. Better detection of browser plugin mechanisms for gcjwebplugin applet support in mozilla, iceweasel and firefox." See also the full announcement and some nice screenshots.

Using Java for Real-Time Systems

"This article, the first in a five-part series on real-time Java, describes the key challenges to using the Java language to develop systems that meet real-time performance requirements. It presents a broad overview of what real-time application development means and how runtime systems must be engineered to meet the requirements of real-time applications. The authors introduce an implementation that addresses real-time Java challenges through a combination of standards-based technologies."

Desktop Java, Desktop Linux: Match Made in Heaven?

"Although the .NET vs. Java war is basically over for control of the Windows desktop, where .NET is sure to become the managed language of choice for new Windows desktop applications, there is a new battle brewing. That battle is for the Linux desktop. Now that Java has been open sourced under the GPL, even the most strict of the 'free software only' distributions can start bundling it and integrating it into their Linux distributions out of the box."

Using Java 5 Language Features in Earlier JDKs

"Java 5 added a number of powerful language features: generics, enumerations, annotations, autoboxing, and the enhanced for loop. However, many shops are still tied to JDK 1.4 or earlier and may be for some time to come. But it's still be possible for those developers to take advantage of these powerful language features while continuing to deploy on earlier JVMs. Brian Goetz returns from his hiatus in this installment of Java theory and practice to demonstrate how."