J2EE-BLOGS

Home Trip

2011-04-04T00:41:00.001+05:30

Some snaps from Cherthala

Google container data center tour

2009-04-20T00:45:00.001+05:30

First presented at the Google Efficient Data Centers Summit, hosted at Google headquarters in Mountain View, CA on April 1, 2009.

Google App Engine - Early Look at Java Language Support

2009-04-15T00:26:00.001+05:30

This video introduces the latest features of App Engine, including an early look at Java language support. Andrew Bowers will walk through the development of a sample Java application, from creation to deployment.

New transliteration bots make it easy to chat in Indian languages

2008-11-13T19:50:00.005+05:30

Have you ever wished that you could chat with your family and friends in your native language? Sometimes there's just no substitute for expressing a thought in your own language. Google Talk now has transliteration bots that will convert text from English to Hindi, Kannada, Malayalam, Tamil or Telugu. Think of a bot as an invited guest to your chat session that will transliterate what you type in English to the right local script. For those who are not familiar with transliteration, it is a service provided by Google India that allows you to type in Indian languages using phonetically equivalent English script (it is also available on our labs page,orkut scraps and blogger). If you're chatting in Hindi, when you type 'haal kaisa hai janab ka?' the en2hi.translit@bot.talk.google.com bot will reply in Hindi as 'हाल कैसा है जनाब का?'

There are currently 5 transliteration bots - Hindi (en2hi.translit), Kannada (en2kn.translit), Malayalam (en2ml.translit), Tamil (en2ta.translit) and Telugu (en2te.translit), and remember that their names end with "@bot.talk.google.com". To use one of these bots follow these three steps:

1) First add the bot that you want to your friend's list. (For example, add en2hi.translit@bot.talk.google.com for Hindi). You just need to do this once.

2) Start a chat session with your friend

3) Convert the chat session to a group chat and invite the bot to it.

Read this to know more about the bots.

See : 2 easy ways to Transliterate English to Malayalam

See : Mozhi Keyman

See : Google Indic Transliteration

See the screen shot below,

Java SE 6 Update 10 is Officially Here

2008-10-29T00:50:00.002+05:30

A nice article form theserverside.com , which explians some of the new exciting features of JDK 6u10.

What’s special about the 6u10 that a minor release gets this much attention? After years of failures in the client space, this release is promising to reverse that trend. The message was clear; the release number maybe minor but the changes are major.

To drive the point home, Danny’s first statement was that this release is about supporting rich client content much better than what we’ve come to expect. To this end, this update has had a major overhaul of its runtime environment. The JDK has been in beta for about a year and in that time it has been downloaded more than 1,000,000 times. Most notability, this version of the JDK will be the oldest to be accepted by Google’s new browser Chrome.

In addition to the hundreds of bug fixes, the 6u10 is being touted to be lighter and more nibble full of features that create a more consumer friendly experience. Another concern was necessary support for JavaFX.

One of the biggest changes comes with the new WebBrowser plugin, Unlike the old plugin, the new plugin runs outside of the browsers process space. The advantages of moving the JRE to run out of process are numerous. The biggest is increased stability. The coolest that you can now drag your applets out of the browser and have them continue to run even after the browser has been shutdown.

Applet startup time is improved with the new plugin. The old plugin started the JRE in the browsers main event thread. WIth the JRE running out of process, the even thread is no longer tied up. The bad news is that the new plug-in is targeted to more modern browsers such as IE 7 and FireFox 3.0.

One of the biggest headaches is how Java has been traditionally delivered to the end users. This has all changed with this version of the JRE. Updates from the browser will happen more automatically without much interactions with the end user. In addition, the JRE has been broken down into a kernel, core classes to Java Plug-In and Java Web Start, and other commonly needed client side APIs. All other bits of the JRE will be downloaded in a low priority background thread. The net effect is that a clean install of the JRE has been reduced to 4 megs.

In addition future updates will be delivered via a patching mechanism that eliminates the need to download the entire JRE.Other performance enhancements include a mechanism that attempts to keep the disk cache hot with the JRE. This can result in a significant decrease in startup time.

Graphics has also been greatly improved with the introduction of Nimbus, the eventual replacement to (still the default system) Ocean. In addition to giving widgets a more modern look, Nimbus signals a switch away from raster to vector graphics. This reliance will allow graphics to perfectly adapt to future higher resolution monitors.

If with all this news you are feeling like an orphaned Mac user or Linux user, that feeling isn’t going to get better any time soon. While one from Sun or apparently from Apple, can speak for when the 6u10 may make to Mac land, recent history has demonstrated that we could be waiting for some time. The big sticking point with Linux is the need to integrate the XRender pipeline. Until 6u10 is released to OSS, that can’t happen.

Even with these hickups, the future of the platform on client machines looks bright. My measure will be when I stop getting Java install questions from my mother. Until then, we can only hope that the realization is as good as the dream.

See JDK 6u10 Release note.

ICE JNI Registry : Windows Registry API Native Interface

2008-10-20T15:58:00.004+05:30

The JNIRegistry package is a Java native interface for the Windows Registry API. This allows Java program to access, modify, and export Windows Registry resources.The com.ice.jni.registry package has been placed into the public domain. Thus, you have absolutely no licensing issues to consider. You may do anything you wish with the code. The package will work with Java 1.1 and greater, and uses the Java Native Interface. The package also includes a DLL that implements the interface. The package includes the pre-built DLL (debug and release), source code (both the Java and the DLL's C code), as well as the compiled Java classes.

Downloads

Download the WinZip-ed package. (FTP)

Download the WinZip-ed package. (HTTP)

You can now directly view the JNIRegistry source code and source code documentation online.

http://www.trustice.com/java/jnireg/index.shtml

Courtesy : Tim Endres ,ICE Engineering, Inc

Intro to REST

2008-10-10T18:46:00.001+05:30

Joe Gregorio goes over the basic principles behind REST.

Javalobby Readers' Choice: Top Java Books

2008-08-10T20:23:00.001+05:30

1.

Votes
27

Avg Pos
1.93

Effective Java Programming Language Guide

By Joshua Bloch

Addison-Wesley Professional

Paperback, 252 pages

List Price: $44.99 - Amazon:

2.

Votes
17

Avg Pos
3.06

Design Patterns: Elements of Reusable Object-Oriented Software

By Erich Gamma; Richard Helm; Ralph Johnson; John Vlissides

Addison-Wesley Professional

Hardcover, 395 pages

List Price: $54.99 - Amazon:

3.

Votes
12

Avg Pos
3.83

Refactoring: Improving the Design of Existing Code

By Martin Fowler; Kent Beck; John Brant; William Opdyke; Don Roberts

Addison-Wesley Professional

Hardcover, 464 pages

List Price: $59.99 - Amazon:

4.

Votes
10

Avg Pos
3

Head First Design Patterns

By Elisabeth Freeman; Eric Freeman; Bert Bates; Kathy Sierra

O'Reilly Media, Inc.

Paperback, 676 pages

List Price: $44.95 - Amazon:

5.

Votes
10

Avg Pos
3.5

Expert One-on-One J2EE Design and Development

By Rod Johnson

Wrox

Paperback, 768 pages

List Price: $59.99 - Amazon:

6.

Votes
9

Avg Pos
2

Thinking in Java (4th Edition)

By Bruce Eckel

Prentice Hall PTR

Paperback, 1520 pages

List Price: $59.99 - Amazon:

7.

Votes
9

Avg Pos
3.11

Code Complete (2nd Edition)

By Steve McConnell

Microsoft Press

Paperback, 960 pages

List Price: $49.99 - Amazon:

8.

Votes
8

Avg Pos
2.25

Head First Java (2nd Edition)

By Kathy Sierra; Bert Bates

O'Reilly Media, Inc.

Paperback, 720 pages

List Price: $44.95 - Amazon:

9.

Votes
8

Avg Pos
4.63

The Pragmatic Programmer: From Journeyman to Master

By Andrew Hunt; David Thomas

Addison-Wesley Professional

Paperback, 352 pages

List Price: $42.99 - Amazon:

10.

Votes
8

Avg Pos
5.25

Applying UML and Patterns

By Craig Larman

Prentice Hall PTR

Hardcover, 736 pages

List Price: $59.99 - Amazon:

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Design FTP : Free web based FTP client

2008-07-22T00:50:00.004+05:30

DesignFTP allows anybody to easily create an account, add your FTP server, and then copy and paste 1 line of JavaScript code to a page on your own website to make a nice web based FTP client application . No need to download and install the desktop based FTP client application like FileZilla. It will easily allow your contacts and clients to upload files to your FTP server without your client’s having to download cumbersome FTP client server software. It emails the account user that the file has been received and even has an option to redirect the user after the upload is received. A free FTP server guest account is available @ BISCU (ftp://ftp.biscu.com , guest@biscu.com, password: guest) . Post files to my FTP server ...

Extensions that are useful for Firefox extension developers

2008-06-29T23:10:00.005+05:30

Below lists some extensions that are very useful for Firefox extension developers:

Extension Developer's Extension
The Extension Developer's Extension exists to make life easier for Firefox extension developers. Testing JavaScript code, prototyping XUL layouts, and building XPI packages are all made easier by this extension.

Features are :

Extension Builder
Install.rdf Editor
Javascript Shell ( Try it online! )
Javascript Environment (Try it online! )
Live XUL Editor (Try it online! )
Live HTML Editor (Try it online! )
JRX: real-time JavaScript RegExp evaluator (Try it online! )
Interactive XPath Tester (Try the original online! )
Enable Debugging Prefs

ChromeBug (FireBug)

2 hidden ways to get more from your Gmail address

2008-06-26T01:57:00.002+05:30

A very useful info for Gmail users, posted by Robby Stein, Associate Product Marketing Manager , Google.

I recently discovered some little-known ways to use your Gmail address that can give you greater control over your inbox and save you some time and headache. When you choose a Gmail address, you actually get more than just "yourusername@gmail.com." Here are two different ways you can modify your Gmail address and still get your mail:

Append a plus ("+") sign and any combination of words or numbers after your email address. For example, if your name was hikingfan@gmail.com, you could send mail to hikingfan+friends@gmail.com or hikingfan+mailinglists@gmail.com.
Insert one or several dots (".") anywhere in your email address. Gmail doesn't recognize periods as characters in addresses -- we just ignore them. For example, you could tell people your address was hikingfan@gmail.com, hiking.fan@gmail.com or hi.kin.g.fan@gmail.com. (We understand that there has been some confusion about this in the past, but to settle it once and for all, you can indeed receive mail at all the variations with dots.)

For me, the real value in being able to manipulate your email address is that it makes it really easy to filter on those variants. For example you could use hikingfan+bank@gmail.com when you sign up for online banking and then set up a filter to automatically star, archive or label emails addressed to hikingfan+bank. You can also use this when you register for a service and think they might share your information. For example, I added "+donation" when I gave money to a political organization once, and now when I see emails from other groups to that address, I know how they got it. Solution: filtered to auto-delete.

See more infor here Receiving someone else's mail

Google My Location service : Find your location without GPS

2008-06-22T15:48:00.004+05:30

You might have heard about the GPS (Global Positioning System) , which is a technology uses the information from earth-orbiting Satellites to determine the precise location of a vehicle, person, or other assets. Most of the most modern 3G mobile phones now come with a GPS receiver and maps application to navigate the precise position of the mobile user. What if they don't have any GPS receiver on their mobile phones ?? Here comes the Google My Location service . Google Maps for mobile version 2.0 launched a new feature called My Location , which enables users to pinpoint their approximate location on a map even if their phone doesn't have a GPS chip. My Location is now available in more than 200 countries and across many different platforms, including BlackBerry, Nokia Series 60, Apple iPhone/iPod Touch, Windows Mobile, and many Java phones.

How this Service works??:

Wireless phones can make and receive calls because they are connected over the air to a nearby cell tower. The phone knows the ID of the cell tower that it's currently using. If the phone has GPS, the Maps application on the phone sends the GPS coordinates along with the cell ID to the Google location server. Over millions of such updates, across multiple phones, carriers, and times, the server clusters the GPS updates corresponding to a particular cell ID to find their rough center. So when a phone without GPS needs its own location, the application on the phone queries the Google location server with the cell tower ID to translate that into a geographic location, i.e., lat/long coordinates.

[Javascript]A Technique For Lazy Script Loading

2008-06-09T00:33:00.002+05:30

A nice article from AJAXIAN that describes the javascript "lazy script loading" clearly.Bob Matsuoka has written a guest article on the topic of lazy script loading. Thanks so much Bob!
A recent article "Lazily load functionality via Unobtrusive Scripts" discussed how to lazily load Javascript script files by appending script elements to the HEAD tag. While this works as expected, I've found that for best results, you should also consider tracking which scripts have been loaded in order to prevent re-loading an already loaded script, and more importantly supporting callbacks so that you can guarantee loading of scripts prior to calling functions that depend on that code.

NOTE: The example loader script, which has been tested in FF, IE, Safari, and Opera, uses prototype.js for DOM and array routines. I developed this originally for a project that already had prototype.js available, but it uses it only superficially. It should be simple to remove these references if you're not using prototype.js.
PLAIN TEXT
JAVASCRIPT:

/**
* Script lazy loader 0.5
* Copyright (c) 2008 Bob Matsuoka
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*/

var LazyLoader = {}; //namespace
LazyLoader.timer = {}; // contains timers for scripts
LazyLoader.scripts = []; // contains called script references
LazyLoader.load = function(url, callback) {
// handle object or path
var classname = null;
var properties = null;
try {
// make sure we only load once
if ($A(LazyLoader.scripts).indexOf(url) == -1) {
// note that we loaded already
LazyLoader.scripts.push(url);
var script = document.createElement("script");
script.src = url;
script.type = "text/javascript";
$$("head")[0].appendChild(script); // add script tag to head element

// was a callback requested
if (callback) {
// test for onreadystatechange to trigger callback
script.onreadystatechange = function () {
if (script.readyState == 'loaded' script.readyState == 'complete') {
callback();
}
}
// test for onload to trigger callback
script.onload = function () {
callback();
return;
}
// safari doesn't support either onload or readystate, create a timer
// only way to do this in safari
if ((Prototype.Browser.WebKit && !navigator.userAgent.match(/Version\/3/)) Prototype.Browser.Opera) { // sniff
LazyLoader.timer[url] = setInterval(function() {
if (/loadedcomplete/.test(document.readyState)) {
clearInterval(LazyLoader.timer[url]);
callback(); // call the callback handler
}
}, 10);
}
}
} else {
if (callback) { callback(); }
}
} catch (e) {
alert(e);
}
}

Download the full source and example project.
Tracking Loaded Scripts
A common use of a lazy loader is in conjunction with "require" type function that allows you to specify which scripts are needed for a particular script to execute. Since library scripts are often called by more than one script, I thought it important to allow my lazy loader to track which scripts have already been loaded on a page to prevent unnecessary re-loading.
In this example, I've created the LazyLoader.scripts array. As each script is called, this script src is tested against the array of scripts already called, and if it exists, the script is not re-loaded, but its callback is executed. This allows you to call any required script as often as needed with impunity.
Supporting Callbacks
A more important addition is support for callbacks. It is my experience that with anything more than the simplest scripts, you cannot guarantee that a script is available for use unless it is called as part of a callback tied to the loading process. Unfortunately most of the browsers handle script onload events slightly differently. The examples I've provided should work for Firefox, Safari, and IE.
The basic logic for supporting callbacks is to allow a closure to be passed to the lazy loader. The function is then bound to the script event triggered by its loading. FF and Safari 3 support the "onload" event. IE supports the onreadystatechange event, and requires further testing of the state for either 'loaded' or 'complete' (depending on whether the script is cached).
Supporting callbacks in Safari 2 and Opera require a slight wrinkle, since neither support "onload" or "onreadystatechange" script events. For these browsers, you need to set a quick interval script to test document.readyState for "loaded" or "complete". Once ready, the interval can be cleared and the callback executed (I use a different interval for each script loaded, but I'm not sure that's necessary, since we are only testing the document object, not the state of the individual scripts).
Calling The Loader
Calling the loader is straightforward. This implementation is setup as a static function using a namespace. Here is an example without a callback:
PLAIN TEXT
JAVASCRIPT:

LazyLoader.load('js/myscript1.js');

Here is an example with a callback:
PLAIN TEXT
JAVASCRIPT:

LazyLoader.load('js/myscript2.js', function(){
var myobj = new MyObject('myobj');
});

In the second example, the "myobj" instance of MyObject is only created after js/myscript2.js is loaded. You can also daisychain loaders by including them in the callback function.
Conclusion
I've used this technique for nearly a year with good results. We have a very large library of objects and functions that are only needed for specific pages that share the same "layout", and this allows us to call the scripts properly (in the HEAD tag, as opposed to including script references within the body of the page) and cleanly. We use this function in conjunction with a "require" function to script dependencies can be shown cleanly.
A script loader also works very nicely when used in conjunction with form-based script loading, which is a technique we use to declaratively reference script objects and bind them to HTML forms, as well as pass in server-side variables. I will discuss this in a follow-up article.

Wow..Google site is open to everyone.

2008-06-01T01:13:00.003+05:30

You might have heard about the Google Page Creator application , which is a free online tool that makes it easy for anyone to create and publish useful, attractive web pages in just minutes. See my page created :-) .

Now Google launched an exciting new web site creator application called Google site , which was the part of Google App earlier. Now Google made it easy for anyone to set up a website to share all types of information -- team projects, company intranets, community groups, classrooms, clubs, family updates, you name it -- in one place, for a few people, a group or the world. You can securely host your own website at http://sites.google.com/[your-website] and add as many pages as you like for free.Getting started with Google Sites is easy. You can create different types of pages from scratch with the click of a button, and you can embed documents, calendars, photos, videos and gadgets directly into those pages. Similar to Google Docs, built-in editing tools allow for popular text and formatting changes to be made in a straightforward, WYSIWYG manner. Once your site is up and running, inviting people to edit or view your content is as simple as entering in their email address (of course, you can change access levels at any time). And you (or anyone who has editing privileges) can add or edit information whenever you'd like.Here's a quick look:

See my sample website created with Google site. Stay up to date with the latest news on our new Google Sites blog.

http://googleblog.blogspot.com/2008/02/bringing-it-all-together.html

Firefox 3 aiming to set world record.

2008-06-01T00:10:00.004+05:30

Firefox is one of the best browsers i have used so far. Its a very powerful , feature rich and fully customizable web browser. Now the good news is Firefox 3 goes live on Download day, some time in June and is aiming to set a Guinness World Record for the most software downloaded in 24 hours.

Pledge to get Firefox 3 during Download Day to set the Guinness World Record for Most Software Downloaded in 24 Hours :-)

GWT 1.5 Release Candidate Announced

2008-05-31T23:36:00.003+05:30

GWT 1.5 has a new release candidate. The 1.5 release is a big one, especially as it includes Java 5 language support!Since the previous release of GWT, there have been a lot of really great applications that demonstrate what is possible when you are able to focus on the user and stop worrying so much about browser quirks and other Ajax obstacles. GWT 1.5 takes the commitment even further with exciting new features and over 150 bug fixes. And, like all GWT releases, most of the benefits are just an upgrade-and-recompile away. What other major features does it have?
New compiler optimizations increase performance

With this release of GWT, we’re happy to announce that our compiler produces faster code than you would write by hand! How’s that? A bunch of new compiler optimizations allow us to efficiently inline method calls, even through many layers of indirection. Translation: all the nice abstractions and clean design work that are essential to maintaining a large code base melt away in the compiler’s output, giving your users the fastest possible experience. By contrast, if you were writing JavaScript by hand, you’d have to choose between writing good code and writing fast code — and when your application got to a certain size, maintainability would make the second choice impossible. With GWT 1.5, you don’t have to compromise; just write good code and let the compiler make it fast.
JavaScript Overlay Types

This further enhances GWT’s interoperability with the underlying JavaScript layer. “Overlay type” is a new term we’re using to describe the ability to model JavaScript objects as strongly-typed Java instances with no additional runtime cost. Overlay types make it easy to provide fine-grained interop with handwritten JavaScript libraries as well as providing an optimal way to make JSON structures directly accessible to GWT code.
High-performance DOM API

Up until GWT 1.5, we’ve concentrated mostly on Widget-level APIs, and until the advent of overlay types (above), direct DOM programming wasn’t particularly convenient. GWT 1.5 goes beyond “convenient” and well into “elegant” with an entirely new DOM API that enables type-safe, low-level DOM programming that will be both comfortable to DOM experts and free of any runtime overhead.
Default visual themes

Several default visual themes are now available by default so that developers get an attractive UI out of the box and have a good starting point to create their own custom styles in CSS. For now, give 1.5 a try.

Embedded Presentations from Google Docs

2008-05-15T02:55:00.001+05:30

Google Docs has just updated their embedded presentation feature to support multiple sizes, so now presentations can look even better in blog posts. To add a presentation to your blog, create it in Google Docs and copy the “Mini Presentation Module” HTML into a blog post. (See: Embedding Presentations in a Web Site)For an example, take a look at this small-sized presentation:

You can include YouTube videos, images, and text captions into slides to condense and display a “deck” of graphical content in a concise format in your posts.Google Docs is a free, web-based word processor, spreadsheet, and presentation application. Try it now.

Brain behind the Google doodles.

2008-05-15T02:20:00.002+05:30

Google doodles, the drawings that are designed on, around and through the Google logo on our home page, are the creation of 29-year-old Google Webmaster Dennis Hwang . See how he creates the doodles.Its just amazing...

I think he is using the Wacom Cintiq 21UX interactive pen display to design the logo (Using Corel Painter software). See the attached videos

[Web2.0] Convert videos online

2008-04-28T14:53:00.003+05:30

These days we can see so many video sharing sites like youtube.com, myspace.com, video.google.com, metacafe.com, dailymotion.com, blip.tv, break.com, ifilm.com, myvideo.de, sevenload.com etc . What we should do , if we want to download and convert the videos from these sites to possibly any format ?? . Here I am introducing a new site , which will convert the videos from the popular video sharing sites or from your local system to different output formats like AVI (DivX, XviD, etc), MPEG4 (iPod, MP4), 3GPP (GSM), 3GPP2 (CDMA), QuickTime (MOV), WMV, Flash (FLV), WMA or WAV.

MOVAVI Online Convertor

If you want add the MOVAVI gadgets to your favorite browser to convert videos watching on a video sharing website , do the following steps.

Internet Explorer On the main menu, click View -> Toolbars and select Links. Then right click on Movavi Online link and choose "Add to Favorites". Answer "Yes" to any security alert, and save the link to the Links folder. That's all there is to it. Now Movavi Online will always show up on the Links bar.

Opera On the main menu, click View -> Toolbars and select Personal Bar. Then drag the Movavi Online link to the Link area. That's all there is to it. Now Movavi Online will always show up on your Personal Bar.

FireFox On the main menu, click View -> Toolbars and select Bookmarks Toolbar. Then drag the Movavi Online link to Bookmark Toolbar. That's all there is to it. Now Movavi Online will always show up on the Bookmark Toolbar.

Some of the other popular Online Video(File) conversion sites are ,

Media Convert (Supports most of the formats)
vixy.net : Online FLV Converter
Jumpcut - Make Amazing Movies Online
Zamzar - Free online file conversion
Create PDF Online free
Flvix.com - Free online video converter
:: Graffiti - VIDAVEE :: (Video Editing and Mixing)
GIFup.com (GIF Animation Generator)
A N I M O T O:(Animate your videos)

Logos of major Web2.0 Services

2008-04-19T02:09:00.003+05:30

Some basic unicode definitions.

2008-04-16T18:02:00.004+05:30

Unicode is a 16-bit character encoding standard capable of encoding the characters of the world's major language scripts. It is designed to be a universal character set . Java is also using unicode character encoding . Some times i got confused with the terms used in Unicode . See John O'Conner 's blog , which describes some of these unicode terms clearly.

Character
The smallest unit of meaning in a written language. This unit typically has a common shape and meaning, although specific shapes can vary quite dramatically. Specific shapes are more commonly called glyphs.
Character Set
An unordered collection of characters.
Coded Character Set
An ordered character set in which each character has an assigned integer value.
Code Point
The integer value of a character within a coded character set.
Character Encoding
A mapping of code points to a series of bytes.
Code Unit
A single octet or byte of an encoded character.
Charset
Often used as a synonym for Coded Character Set.

You can always see more terms by visiting the Unicode Glossary.

JNode - Java Operating System

2008-03-06T17:09:00.005+05:30

Have you ever thought about writing an Operating System in Java programming language ?? Hmm....something strange eh? As you know Java is basically used to write Application level program and normally don't provide access to the system/Hardware level. So we can't write any system programs in Java (but you achieve this to some extent using Native Interface).Then how its possible to write an OS using java programing language ??

JNode is such an initiative to write an Operating system in java.The goal is to get an simple to use and install Java operating system for personal use. Any java application should run on it, fast & secure! . Still we can't avoid the system / assembly programming to achieve this completely. See the JNode architecture ,

JNode is a Virtual Machine and an Operating System in a single package.

Screen Shot:

GWT Tutorials.

2008-03-06T12:36:00.004+05:30

Here i am listing some of the good GWT tutorial links that i found on the PathFinder Agile AJAX blog.

Getting Started Guide - From the GWT site itself, their basic kickstart.
Kickstarting Google Web Toolkit on the Client Side - Early "Hello, World!" tutorial with a second, animation example. This quick-start tutorial aims to translate some of the knowledge gained from my monkeying about with GWT into a useful text which will get other developers up and running quickly. To keep things nice and simple, we'll focus on only client-side matters.
Google Web Toolkit Tutorial: The Break Down - Very short tutorial from early on. Demonstrates a simple rollover with GWT.
Working with the Google Web Toolkit - Extensive tutorial with lots of screenshots that demonstrates everything from the basic getting started to some of the more interesting features, such as history support (i.e. the back button.). Article includes a Maven module for GWT.
Introduction to the Google Web Toolkit - another extensive tutorial, this one from Oracle, so if you want to see how to GWT with JDeveloper, this one is for you.
GWT Tutorial with Googlipse - yes, Googlipse is no more, but Cypal Studio has taken it's place. This demonstrates one way of doing GWT with Eclipse.
Exporting WAR in GWT - Tutorial to create a WAR file in command line (works only with WTP 2.0).
GWT Small Guide - I wrote this guide thinking in the user's who want's develope dynamic application's with the GWT (Google Web Toolkit) in an AMP(Apache,MySQL,PHP) environment's. The basic idea is write a small and very simple application using MySQL and PHP at the server side, and GWT for the client interfaze, using JSON for the communication between the client and the server.
Ajax for Java developers: Exploring the Google Web Toolkit - One of several GWT tutorials from IBM's developerworks. In this article, I'll run through creating a simple GWT application to fetch a weather report from a remote Web API and display it in the browser. On the way, I'll briefly cover as many of GWT's capabilities as possible, and I'll mention some of the potential problems you'll come across.
Trivial GWT Example - from Robert Hanson, who went on to write an excellent book on GWT, a simple GWT-RPC example.
Build an Ajax-enabled application using the Google Web Toolkit and Apache Geronimo - recent (May 2007) two part series (part two is here) with source code, flash demos, etc.. Requires registration.
Google Web Toolkit - This article describes the development of a simple Ajax application on Mac OS X using GWT and familiar Java tools, such as Apache Ant, the Tomcat 5.0 servlet container, and the IntelliJ IDEA integrated development environment (the latter is a commercial IDE). The article assumes some knowledge of Java and Ant.
GWT Tutorial - focuses on producing a web site, rather than a webapp.
Getting Started - the first of Paval JBanov's planned five GWT tutorials. The others are First Application, Core widgets and panels, Custom widgets and RPC (not yet written).
GWT Plugin Tutorial - oddly enough, this tutorial demonstrates how to integrate GWT with Struts 2 WITHOUT the GWT plugin. Hmmmm.
Getting Started with Google Web Toolkit (GWT) - Very basic, getting started instructions.
Tutorial: Creating a Login application - demonstrates the use of Instantiations' GWT Designer tool (WYSIWYG UI design for GWT).
Basic GWT / PHP Communication - Part 1: Java and Part 2: PHP. All the GWT documentation is about hooking up Java on the front and back ends. What about PHP? This shows how.
String-based RPC between GWT and PHP - forget about serializing Java objects via XML and JSON; this is the dead simple approach.
Using cURL to Interface GWT with an Existing Site - this one is kind of hard to explain. If you know about curl and PHP, this article is worth reading.
Creating GWT RPC Services Tutorial - short guide to using gwt4nb, the Netbeans plugin for GWT, to create GWT-RPC services.
Creating a simple app with GWT4NB - flash based tutorial on creating an anagram application with GWT and Netbeans.
Googled by GWT - Part 1 and Part 2. Extensive getting started tutorial with lots of screenshots.
Google Web Toolkit Tutorial - short example demonstrates use of the keyboard listener.
Step by Step: A Mortgage Calculator using GWT - as it says, a mortgage calculator demo using GWT.
IntelliJ IDEA: Google Web Toolkit as 1-2-3 - Animated demo walks through the configuration of IntelliJ Idea for the
Google Web Toolkit and shows how to write a GWT image viewer
application.
IntelliJ IDEA: Creating GWT Application from a Web Module - Animated demo of using GWT in a web module (IDEA's project/module type for Java webapps).
Ajax for Java developers: Exploring the Google Web Toolkit - extensive tutorial from IBM developerworks that builds all the way to a weather reporter widget.
Integrating the Google Web Toolkit with JSF using G4jsf - I can't say that I really love JSF, but if you bend that way, this will teach you how to marry the two. Extensive with lots of code snippets and screenshots.
Asynchronous Google (Web Toolkit) and Django - Integrating GWT and Django using JSON.
Using VistaFei IDE 1.0 for GWT: A Tutorial - VistFei is an IDE. The last time I looked at it, this tutorial had somehow lost it's screenshots and the CSS had been jacked up.
Using Google Web Toolkit - video HOWTO by Bruce Johnson, the tech lead of GWT.
GWT-Spring Integration Demystified - any time a new technology comes along, it just has to be integrated into Spring. Here you go.
Build an Ajax application using Google Web Toolkit, Apache Derby, and Eclipse - Part 1 and Part 2. Extensive tutorial in two parts, the first of which deals with the front end, the second of which deals with the back end.
Ease AJAX development with the Google Web Toolkit - develops a book search application as part of a getting started tutorial.
Roughian Examples - combination demo/tutorial of GWT. Version 2 is under development.

Update: See Yet Another 17 GWT Tutorials

Courtesy : Path Finder Agile AJAX blog

[Video] AJAX explained in 8 minutes ;-)

2008-02-23T12:33:00.005+05:30

I have created a video tutorial to give a quick introduction about the AJAX and how it works.

AJAX : Fixing the Back Button and Enabling Bookmarking.

2008-02-22T01:22:00.002+05:30

AJAX , Web 2.0 , RIA , Mashups these are the buzzwords of today's internet world . The most popular technology used for creating such dynamic , feature rich , interactive , desktop like web applications is AJAX. One of the major drawback of the AJAX enabled Web application is the browser integration. ie , The dynamically created page does not register itself with the browser history engine, so triggering the "Back" function of the users' browser might not bring the desired result. Also it make difficult for a user to bookmark a particular state of the application . I was searching for a mechanism to fix this issue and found an excellent article by Mike Stenhouse describing the methods like changing the URL and iFrame . Have a look at the article given in the below link.

Fixing the Back Button and Enabling Bookmarking for AJAX Apps