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J2SE

  Was added to his package to facilitate applications which needs scalable processes. A feature is atomic variable. Variable atomic means that it cannot be divided -  it's like the S.O. with any resource (Driver CD, USB) cannot be divided but needs be used in many processes.              ...
on Oct 26, 2011
In this part we will discuss the basic classes that we will work with them to have file system operations like copying a file, dealing with symbolic links, deleting a file, and so on. I will write a separate entry to introduce classes which are new to Java 7 for dealing with streams and file contents, watching service and directory tree walking. If you want to know what are new features in Java...
on Jun 1, 2010
I will write a series of blog to discuss what are the new features introduced in NIO.2 (JSR 203). The NIO.2 implementation is a part of OpenJDK project and we can alreay use it by downloading a copy of OpenJDK binary.  In the first entry I will just go through what are these new I/O features of Java 7, which help developer iron out better applications easier. Talking about File systems support...
on May 20, 2010
Do you remember the email you got to tell you that your jre had a vulnerability? No? What about the fact that Java 5 is in an end of life phase. Given the time it has taken for Java 7 to appear its has somewhat slowed the normal EOL pace of the Java platforms. You may not know that Java 1.4.2  for business will be supported commercially until April 2018,  which is kind of mind-...
on Apr 28, 2010

GUI

Welcome java 7 part 3 -NIO 2 JSR 203   So like the coin project, in the NIO 2 there aren't unprecedented features in this e -specification, but now it's possible do some easier work I/Os in java. With the class java.io.Files are possible to perform several operations in simple mode. For that it needs and uses the java.io.file.Path, this interface represents files and...
on Oct 10, 2011

Performance

I've just compiled the hotspot (server 64bits) using the hotspot-comp workspace of hotspot express   http://hg.openjdk.java.net/hsx/hotspot-comp/hotspot/ Here are the result (average of 8 best run on 10) when running PHP.reboot (my own toy language) on fibonacci function, (-server is the server VM of jdk7, -hsx is server VM of upcoming jdk7 update) Java:java -server bigfibo  ...
on Sep 4, 2011

Community

Given some information about Java 7, i will now show the imrovements to the latest version.In this article i use the netbeans version 7.0.1, for this you need to download the JDK 7 (the link is below the article). After downloading and installing Netbeans (but during the installation remember to select the JDK 7 path).   The first example will show switch with String, previously...
on Aug 21, 2011
Beyond being merely a computer programming language, Java is the most widely used software platform in the entire world. There is a large number of various software solutions that were developed using this technology. Without many people being aware, Java is present in our daily lives in embedded technologies like blue-ray discs and a countless number of sites on the internet that...
on Jul 26, 2011
In JUG-AFRICA we started an Open Source project to manage the BIG ANNUAL EVENTS for our JUGs. The first release will be available in the early second half of January. The application will provide all services bellow via the REST Web services :     - Appointment Manager - Conference Manager - Paper reviews and approval Manager - Profile Manager - Registration Manager - Sponsorship...
on Jan 2, 2011
Mark Reinhold announced today that the JDK 7 / JavaSE 7 project has slipped once again: mid-2011 without Jigsaws and Lambdas, late 2012 for JavaSE 8 with those. The delay (or some other bad news like dropping features) was already expected by anyone who tracks the project. But really, how big and bad is this delay? As a big enthusiast of both Jigsaw and Lambdas - and as a tech writer who just...
on Sep 8, 2010

Blogging

The month of July was a global gathering for all Java Communities around the world to say "Hello" to Java 7. JUG-AFRICA also hosted multiple events to celebrate Java 7 (see the photos below). I have traveled in Africa to give technical Java7 talks and met with hundreds of vibrant Java and Android developers. In Dakar, Senegal (July 7), Brazzaville, Congo (July 9) and Kinshasa, DRC...
on Aug 7, 2011

Virtual Machine

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on Feb 10, 2011
Lukas Stadler is my hero, at last JVM summit, he just explain how coroutine and friends can be implemented in the VM and guess what, it now works (currently only with C1). Let's try to implement something with it. Generator I have always wanted to have generator in Java. After all, Python have this feature, Ruby and C#(*) too. A generator is a way to define an iterator but instead of...
on Nov 19, 2009

Education

I'll like to let you know the dates of JCertif 2011 the biggest Java Community Event in Africa. About 800+ attendees from many countries. We will be happy to have you as Speaker on Developer Tools, Java, Open Source, Mobile Apps...or Business solutions. I'll like to let you know the dates of JCertif 2011 the biggest Java Community Event in Africa. About 800+ attendees from many countries....
on Jan 1, 2011

Accessibility

My name is Haim Michael, I am the General Manager for Zindell Technologies and I am an eternal student and a lecturer. I chose to develop the abelski web site for the benefit of all people world wide. I have started to develop it in November 2007 and I continuously update its courses and add new ones. All courses on this web site are available for free personal and academic usage.  The...
on Oct 4, 2010

Security

 In two previous entries I covered Introducing NIO.2 (JSR 203) Part 1: What are new features?  and Introducing NIO.2 (JSR 203) Part 2: The Basics  In this entry I will discuss Attributes introduced in NIO.2. Using attributes we can read platform specific attributes of an element in the file system. For example to hide a file system in DOS file system or to check the last access date of a file in...
on Jun 23, 2010

EJB

I decided to write down the answer for some questions which my book's readers email me or ask me via twitter in my weblog so everyone can benefit from the answers. Here is the answer to the first question which involves custom security realms. GlassFish supports 5 types of security realms out of the box which are sd follow: File Realm: Usefull for development and testing purposes. GlassFish...
on May 18, 2010

Programming

Last June, Arnold Schwaighofer push a patch to mlvm repository that allow to transform tail call invocation of a method to a jump. Even if this transformation is classical in language like Lisp, Scheme or Caml, the JVM was not offering any help to optimize this kind of call until this patch. Recently, Tom Davies has refreshed the patch in order to be used with a more recent...
on Dec 18, 2009
Mark Reinhold recently blogs about the renaissance of closure in Java (*). In his blog, he also wrote that in order to have closures in Java, Java will have to include another feature named extension methods. As you may already know, I'm a big fan of closures but the introduction of extension methods in Java really scary me. * Ok, they are more lambdas than closures. Why extension...
on Nov 28, 2009
Java VM embodies continuations now (not in production, in a hacking mode :), This post shows how to write a non-blocking server with continuations. Why using continuation with non blocking IO There are two models when you deals with IO: the thread model: read and write calls block until they at least read one caracter or write the whole buffer, so one use thread to be able to...
on Nov 22, 2009