Because real-time programming requires a time-predictable standard library.
"The ability to simplify means to eliminate the unnecessary so that the necessary may speak."
                                                           Hans Hofmann, Introduction to the Bootstrap, 1993

 
 
Javolution real-time goals are simple: To make your application faster and more time predictable!
  • Minimalistic - Collection classes, supporting custom views, closure-based iterations, map-reduce paradigm, parallel computations, etc.
  • Optimized - To reduce the worst case execution time documented through annotations.
  • Innovative - Fractal-based structures to maintain high-performance regardless of the size of the data.
  • Multi-Cores Ready - Most parallelizable classes (including collections) are either mutex-free (atomic) or using extremely short locking time (shared).
  • OSGi Compliant - Run as a bundle or as a standard library. OSGi contexts allow cross cutting concerns (concurrency, logging, security, ...) to be addressed at run-time through OSGi published services without polluting the application code (Separation of Concerns).
  • Interoperable - Struct and Union base classes for direct interfacing with native applications. Development of the Javolution C++ library to mirror its Java counterpart and makes it easy to port any Java application to C++ for native compilation (maven based) or to write Java-Like code directly in C++ (more at Javolution C++ Overview)).
  • Simple - You don't need to know the hundreds of new Java 8 util.* classes, most can be built from scratch by chaining Javolution collections or maps. No need to worry about configuration, immutability or code bloating !
  • Free - Permission to use, copy, modify, and distribute this software is freely granted, provided that copyright notices are preserved (BSD License).
 
 
  1. Javolution classes are simple to use, even simpler than most JDK classes. You don't need to guess the capacity of a TextBuilder, FastTable or a FastMap, their size expand gently without ever incurring expensive resize/copy or rehash operations (unlike StringBuilder, ArrayList or HashMap).
  2. Developers may achieve true separation of concerns (e.g. logging, configuration) through Context Programming or by using classes such as Configurable.
  3. Javolution classes are fast, very fast (e.g. Text insertion/deletion in O[Log(n)] instead of O[n] for standard StringBuffer/StringBuilder).
  4. All Javolution classes are hard real-time compliant with documented real-time behavior.
  5. Javolution makes it easy for concurrent algorithms to take advantage of multi-processors systems.
  6. Javolution's real-time collection classes (map, table and set) can be used in place of most standard collection classes and provide numerous additional capabilities.
  7. Any Java class can be serialized/deserialized in XML format in any form you may want, also no need to implement Serializable or for the platform to support serialization
  8. Javolution provides Struct and Union classes for direct interoperability with C/C++ applications.
  9. Javolution is fully integrated with OSGi but still can be used as a standard Java library.
  10. Javolution can be either a Pure Java Solution or a Pure Native Solution (C++ mirror), small (less than 400 KBytes jar) and fully produced through maven (Java and C++).
   Javolution Version 6.0 - August 18th, 2013 (finally !)

 
 
The simplest way to use Javolution is through Maven with the following dependency in your POM.xml 
      <dependency>
          <groupId>org.javolution</groupId>
          <artifactId>javolution-core-java</artifactId>
          <version>6.0.0</version>
      </dependency>
The native dynamic library (.dll or .so) is generated from the sources using the Maven Native Plugin
Released artifacts are available from the maven central repository, all snapshots (with sources/javadoc) are deployed to the java.net repository
The standard Java distribution is an OSGi bundle which can also be used as standalone Java library. The C++ distribution includes a port of standard Java classes, Javolution classes, OSGi and JUnit. Below is the table of correspondance between the Java packages and Javolution C++ namespaces.
Java Packages
C++ Namespace
C++ Port Comments/Limitations
java.lang
javolution::lang Includes Thread, Class<T>, Enum<T> etc.
java.util
javolution::util Holds standard Java interfaces and Javolution implementations: FastMap<T>, FastTable<T>, FastSet<T> etc
org.osgi
org::osgi Also provides an embedded OSGi runtime (light).
junit.framework
junit::framework Usage examples are provided with Javolution source distribution (module test-cpp)
Developpers may download the test-cpp maven submodule which illustrates the use of OSGi and JUnit in C++ Both libraries (Java and C++) provide benchmark tests. Here are the Java benchmark results and here are the C++ native test results.
 
 
Runtime Environment: Any (Android, J2SE, Native Windows/Linux/Solaris)
Compilers: All (including Visual C++, GCC, SOLARIS Studio)
Build tool: Maven
 Issues Tracking: JIRA (java.net)
Style Guide: Coding Standard Addendum.
Preferred Environment: Eclipse (UTF-8 Encoding) and NetBeans
Others: Colapi - Maven Plugin to format/colorize Java code in API documentation.

 
 
Articles related to Javolution (previously known as: J.A.D.E. Java Addition to Default Environment): Known projects using Javolution:
  • Resoa - Open Source project for SOA & Cloud computing
  • JScience - Java Tools and Libraries for the Advancement of Sciences.
  • Glimworm - I.T. Firefly CMS Product
  • ALMWorks - Bug-tracking systems, Deskzilla and JIRA Client.
  • Open For Business - Open source enterprise automation software project.
  • RADlab - Similator for radiation detection and measurement experiments.
  • jgame - Real-time and embedded gaming API.
  • MathEclipse - A symbolic mathematics engine written in Java.
  • JRoboOp - Java package for robotics simulation with visualization of a 3D robot model.
  • JMulTi - Time Series Analysis with Java.
  • JStatCom - A Software Framework for Data Based Analysis.
  • OVal - Object Validation Framework.
Known projects having a C++ port of their Java library or specifications based on Javolution:
  • OSGi - Included in Javolution core distribution
  • JUnit - Included in Javolution core distribution
(Let us know if your project uses Javolution and you would like it to be listed here)

Javolution's users can also show their support with the "Powered By Javolution" button:



(e.g. <a href="http://javolution.org"><img src="http://javolution.org/src/site/css/img/javolution.png"></a>);
this is of course purely optional.
 
 
  • August 18, 2013: Javolution 6.0

    Includes fractal classes, Java 8 support (collections), real-time annotations, OSGi pluggable contexts, perfometer, mirror C++ library, etc.

    Most backlog issues have been fixed !

  • May 6, 2007: Javolution 5.0
    Deprecated release.
  • September 18, 2006: Javolution 4.0
    Classes renamed as per coding standard (e.g. XmlFormat => XMLFormat)
  • March 3, 2005: Javolution 3.0
    Introduction to context programming.
  • October 4, 2004: Javolution 1.0
    Spin-off of Java Addition to Default Environment [1.0.0]
Javalobby.org Comments : Mailing Lists
Project Owner : Jean-Marie Dautelle
Revision : August 18th, 2013

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