InfoQ Homepage JVM Content on InfoQ
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JRuby Roundup: JRuby 1.3 Released, ruby2java, JSR 292 Progress
JRuby 1.3 is now available, bringing performance improvements and compatibility with Google AppEngine. Work on other improvements is continuing and a first version of the ruby2java compiler is now available. Also: InvokeDynamic support is making it's way into the builds for the next Java version.
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Sun Clarifies on the G1 Garbage Collector Licensing Controversy
A couple of days ago InfoQ posted an article about the fact that the release notes for G1 in the latest Java update, mandated that it was to be used in production only by organizations with a Sun support contract. Following the debate and the reactions that where raised in the community, Sun has explicitly updated the release notes and has removed the controversial clause.
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OpenJDK 7 / JDK 7 Milestone 3 Released
A new milestone of the next generation JDK has been released, which includes several new features and enhancements in many functional areas, like garbage collection, NIO and more. This is also the first version where OpenJDK and JDK will have (almost) identical code-bases.
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Is Sun offering the new G1 Garbage Collector Only with a Paid Support Contract?
Sun's Garbage First garbage collector (nicknamed G1) has been released with Java Update 1.6.0_14 (6u14). Although this low pause, server style collector has been long awaited by the developer's community, at this point Sun allows production usage only to paying customers and this has raised concerns.
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Sun's Garbage First Collector Largely Eliminates Low Latency/High Throughput Tradeoff
In a recent podcast, James Gosling talked to Danny Coward about the significance of Sun's new Hotspot garbage collector Garbage First for developers of large-scale enterprise systems.
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Is It Premature to Talk About C++ and Java’s Legacy?
Bruce Eckel’s recent blog post on the legacy left by C++ and Java generated a lot of reaction. While mentioning some design mistakes, he concludes that both languages have had a significant role in programming languages evolution and an important positive legacy. But is it not too early to talk about their legacy?
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Presentation: Evolving the Java Platform
In this presentation recorded at QCon London 2008, Ola Bini talks about the current status of the JVM regarding languages running on top of it and the need to evolve in order to support dynamic languages.
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The Ioke JVM Language: The power of Lisp and Ruby with an intuitive syntax
Ola Bini, a core JRuby developer and author of the book Practical JRuby on Rails Projects, has been developing a new language for the JVM called Ioke. This strongly typed, extremely dynamic, prototype based object oriented language aims to give developers the same kind of power they get with Lisp and Ruby, combined with a nice, small, regular syntax.
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Interview: Neal Ford On Programming Languages and Platforms
In this interview made by Sadek Drobi during QCon San Francisco 2007, Neal Ford talks about the tendency of having multiple languages running on one of the two major platforms existing today: Java and .NET. He also presents the advantages offered by Ruby compared to static languages like Java or C#.
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Terracotta-VisualVM Integration Offers Cluster-wide Visualization and Event Correlation
Terracotta integration with Sun Microsystem's VisualVM tool offers JVM and cluster-wide visualization. Terracotta announced last week its integration with Sun's VisualVM technology which gives Java developers and web administrators visualization and analysis capabilities to assist in tuning and troubleshooting of Java applications using the Terracotta management console.
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Article: Exploring LISP on the JVM
This article, written by Per Jacobsson, is aimed at Java developers curious about Lisp. It discusses the different dialects of Lisp that are available on the JVM today, and gives a crash course in how Lisp programming works and what makes it unique. Finally it looks at how Lisp code can be integrated with a Java system.
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Article: Do Java 6 threading optimizations actually work? - Part II
In part 2 of "Java 6 threading optimizations" article series, author Jeroen Borgers examines various threading optimizations and JVM arguments to manage them. He also talks about factors like On Stack Replacement (OSR), Heap Management and Lock object data size which could significantly affect the performance of multi-threaded java applications.
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Excelsior JET 6.4: Smaller, Faster, More Secure Java
Since the beginning of time Java applications have been battered with complaints about startup time, memory footprint, performance and security. Recently Sun started to address some of the issues by introducing the Consumer JRE. However, Excelsior JET is a product which provides their own spin on solving these problems.
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Article: Do Java 6 threading optimizations actually work?
Features like biased locking, lock coarsening, lock elision by escape analysis and adaptive spin locking are all designed to increase concurrency by allowing more effective sharing amongst application threads. But do they actually work? In this two part article, Jeroen Borgers explores these features and attempt to answer the performance question with the aid of a single threaded benchmark.
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JSR-292 Early Draft Review Announced
The early draft review of JSR-292 has been released. JSR-292 defines the 'invokedynamic' instruction, a bytecode instruction to assist in the implementation of dynamic languages on JVM.