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Accessibility

Have you recently checked out your company’s web presence and thought to yourself that it was in dire need of an update? But then maybe you started imagining the pain of pushing new data there, and resigned at the mountain of work ahead. Or maybe your mind turned to even more pressing problems with the site - maybe it doesn’t render correctly on mobile, or no updates get pushed into social media...
on Jun 5, 2014
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

Servlets

WebSocket is a bi-directional, full-duplex, TCP based messaging protocol. It is originally proposed as part of HTML5 and is a IETF-defined Protocol (RFC 6455). And W3C has defined JavaScript API for WebSocket which is in candidate recommendation since 2012-09-20. JSR 356: Java API for WebSocket provides a standard Java API for creating WebSocket Applications. The specification provides an API for...
on Aug 7, 2013
Content available at: http://blogs.sun.com/arungupta/entry/totd_136_default_error_page
on May 18, 2010

Web Design

The definition of a Validator according to the Validator interface: void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException The Faces Context is passed in so the validator can introspect various aspects of the request and response. The UI component is passed in because the actual value will be stored in that UI component after it has been...
on Sep 3, 2012
I was recently asked the question: Rails or Grails? I needed to summarize the key differences and industry sentiment. This was my response. Before I make any subjective comments, let me start with some objective metrics I found: http://www.expectationgap.com/posts/13 Now for my sentiments, I believe there are three key-dimensions: momentum, cloud-support, and people. Momentum Rails has the...
on Dec 2, 2010
Kirill Grouchnikov recently published Design, uninterrupted #16: Today’s post highlights the design of Jen.gs, the personal website of Jen Germann. An interesting color scheme uses dark melanzane for background, light gray for main text, light blue for section headers and sunset orange for links; the orange color is also used in the main logo and two separators. The main section uses Cufon...
on Apr 21, 2010
Over the weekend, I was reading Mark Pilgrim's great book on HTML5 - and when I got to the part about the semantic tags, I thought it might be worth a quick mention. In case you've missed out on HTML5 in general (and don't want to take the time to read that book I linked above), the idea behind semantic tags is that many sites use div blocks to mark out the same kinds of content, over and over....
on Feb 8, 2010
Progressive Enhancement is a philosophy of web design - start with simple pages, and build them up based on the capabilities of the browser viewing the page. It’s related to (and in some ways, the opposite of) the idea of Graceful Degradation, starting with a nice, fancy page, and dealing with any browser faults in an elegant manner. Prehaps the simplest example to see this in action is the...
on Feb 7, 2010
 Last week Apple released their latest product destined to change the world (the iPad).  At least that's what they want us to believe.  Perhaps the biggest controversy over the thing is the lack of Flash capability.  However this being java.net I have to wonder out loud, where is Java capability, and more importantly why isn't as much controversy being raised over Java being...
on Feb 3, 2010

Community

This year is a good year for Meruvian, after 6 years work, now the student can achieve as winner in national competition, but we still have problem send them to APICTA for Asia  Pasific ICT competition, because dunno why. Merit Award could be sent to Asia Pasific. but cant... I wish APICTA global organizer read my blog. Edy is a 15 years, when in competition happen, he was still 2 year in...
on Dec 4, 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
The Facebook platform has significantly changed during the last year. The three most important changes were the emergence of the Facebook Graph API, the Facebook JavaScript SDK and the Facebook Social Plugins. For each one of these three topics I chose to develop a professional course. These courses are available at www.xperato.com. The community version is available for free personal and...
on Oct 13, 2010
Content at: http://blogs.sun.com/arungupta/entry/oracle_at_eclipsecon_2010_java
on Mar 2, 2010

Education

I have recently completed to update the professional Java Script Programming course I deliver via www.xperato.com. One of the new added topics is a detailed coverage of the available Java Script debuggers in today most popular web browsers: Firefox, Internet Explorer and Chrome. The following three video clips explain how do we use these debuggers. You can find the community version of my Java...
on Mar 21, 2011
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
What it means to speak German fluently and to be able of C++ Several years ago one of our key coders moved from the south of Germany (where our HQ is located at the Black Forest) to the cold and rainy north, so we had to to find a suitable substitute. After screening lots of applications, we picked few to invite for an interview. It declared the candidate's ability to speak German and C++. So she...
on Feb 20, 2010

Security

Single Sign On allows web applications to share the same authentication state. GlassFish v2 supports virtual server level Single Sign On (SSO). Web applications with the same authentication realm in a given virtual server can share the authentication state in GlassFish v2. GlassFish 3.1 supports SSO failover at cluster level. So one has high availability for Single Sign On in a virtual server of...
on Mar 1, 2011

GUI

We are opening our embeddable Wiki engine "GWiki", which is written in Java with the Apache License 2.0 to all backend Java developer in the world. If you want to allow your customer to edit rich text fragments in your app, even their I18N files or mulitimedia content in the Wiki-way... try our GWiki - it rocks. Since Gwiki can be extended with macros written in Java...
on May 22, 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