Java2Script Pacemaker

You may already know Web OS, like eyeOS. In fact, those web OSs are web desktop + web services. And there are lots of web desktop styles. And here we introduce Java2Script Desktop, basing on Java2Script SWT technology:

There are four elements on the above screen shot: Tray Bar (left upper corner), Task Bar (left side), Quick Shortcut Bar (bottom), Window.

This is a prototype design for Java2Script Desktop. Please check it out at http://izuz.net/gtalk/ . Hope to hear your feedback.

Eclipse RAP team has just released its 1.0.

The RAP project enables developers to build rich, Ajax-enabled Web applications by using the Eclipse development model, plug-ins with the well known Eclipse workbench extenstion points, JFace, and a widget toolkit with SWT API (using qooxdoo for the client-side presentation). The project has graduated from incubation and released its 1.0 release.

In fact, Eclipse RAP and Java2Script have a lot in common. Both are based on SWT API and have goals to provide ways for developers to share the same base of code for products that deploy to the web and the desktop. Here is overview of Eclipse RAP. And you can also read Java2Script’s overview for comparisons.

And you can also check out Eclipse RAP demo to get more details. It’s interesting to see that RAP and Java2Script have 2 very similar demos: RAP’s RWT Control Demo and Java2Script’s SWT Control Examples.

More discussion may be found at ajaxian.com.

Related link: InfoWorld Eclipse offers AJAX server

Here comes Java2Script 1.0.0 final release!

Please visit http://j2s.sourceforge.net/ for more information.

Feature List
==========

Java2Script Core
—————-
1. Object oriented JavaScript simulator is introduced
2. JavaScript ClassLoader is built inside
3. Eclipse JDT based Java to JavaScript compiler, support Java 1.4 and Java 5 features, including generic, enums, static imports, enhanced loops
4. Support incremental building for Java projects
5. Support Hotspot JavaScript swapping for debugging
6. Support most classes in java.lang.*, java.utils.* and others packages
7. Support native JavaScript through @j2s* Javadoc in Java sources
8. Support creating Java2Script projects by wizard, including Servlet project
9. Support loading *.js from Firefox Add-on.
10. Support Eclipse 3.1.*, 3.2.* and 3.3.*

Java2Script SWT
—————
1. Eclipse SWT 3.1 API is ported for JavaScript in modern browsers, Firefox, Internet Explorer, Opera, Safari
2. Window manager is built inside
3. Support UI blocking fow SWT’s Shell and Dialog
4. Support SWT deffered layout
5. Support detecting font size change in Firefox

Java2Script AJAX
—————-
1. HttpRequest/AJAX is introduced for both Java and JavaScript
2. Simple RPC API is introduced to call back Java server, which supports Cross Site Scripting
3. Support dynamic class loading for both Java and JavaScript
4. Support Java reflection (early implementation)

Java2Script JUnit
—————–
1. Support JUnit tests both Test Case and Test Suite in text mode.

Java2Script Example
——————-
1. Google Talk in JavaScript ( http://demo.java2script.org/gtalk/ )
2. SWT Control Examples ( http://demo.java2script.org/controls/ )

For more feature detailed description, please visit:
http://j2s.sourceforge.net/features.html

Here is an early screenshot:

BTW: Window Builder Pro was used to design the above UI

For more updated information, please visit http://demo.java2script.org/gtalk/.

I spent about three days writng an SWT based Google Talk client. And the client used Smack Jabber library, which has simple APIs. As writing the client, I kept the code compatible with Java2Script, which means that I can use the latest Java2Script daily release to pack it as a web servlet application and deploy it as rich internet application (RIA). Here is snapshot of Java2Script version of Google Talk:

And here is the online Java2Script’s GTalk.

And because Java2Script’s SimpleRPC supports Cross Site Script, the above application can be loaded from any pages by adding the following HTML

Launch GoogleTalk

to your page.

Or you can just copy the above “javascript:…” part (without quotes) and paste it to address bar and go. You will get a Google Talk client (pure JavaScript) in your page (this page or other pages). This “javascript:…” part is considered as A Link An Application (ALAA).

By digging about Google Talk on Digg.com, I found that Google Talk Gadget on Google’s personalized homepage was really hitting the latest news.

Enjoy it.

Update:

The Java2Script’s Google Talk sources are available at SVN repository now:
http://j2s.svn.sourceforge.net/viewvc/j2s/trunk/demos/org.java2script.demo.gtalk/

And you can also download j2s-1.0.0-m5-gtalk.zip, unzip it and deploy gtalk.war to your Java servlet container.

Copy following as a link and paste in your browser address bar (A new tab or a new window, or other existed tab page[Maybe a Google search result page, not this blog page]):

javascript:if(a="$wt.examples.controlexample.ControlExample@http://demo.java2script.org/org.eclipse.swt.examples/bin/",window["ClazzLoader"]!=null)$w$(a);else{var d=document,t="onreadystatechange",x=d.createElement("SCRIPT"),f=function(){var s=this.readyState;if(s==null||s=="loaded"||s=="complete"){$w$(a);}};x.src="http://archive.java2script.org/1.0.0-v20061220/j2slib.z.js";(typeof x[t]=="undefined")?x.onload=f:x[t]=f;d.getElementsByTagName("HEAD")[0].appendChild(x);void(0);}

According to your connection speed, it may take a few seconds before some Java2Script things come up. Enjoy it.

Replace the link’s “$wt.examples.controlexample.ControlExample @ http://demo.java2script.org/org.eclipse.swt.examples/bin/” with your Java2Script application URL. It’s class’s full name + @ + the class’s *.js bin root folder. If the URL is not very long (total javascript url string length < 500), it will be OK for modern browsers to load your application.

I spent some time to enhance a web notepad with auto-save feature. Here is screenshot:

As a matter of security fact, it is not ready for public tests, so now I am not publishing the . Maybe later I will add more strict rules to the notepad so that no malicious modifications harm the system. Or maybe I will not take such a risk.

Actually, more desktop applications can be converted into rich internet applications. I even consider converting a terminal console into Java2Script web application is possible. But maybe I won’t do so.

The updates mainly include Combo, Spinner, Menu, ToolBar and CoolBar. For more details, please check out latest sources from SVN, or stay tuned for 1.0.0 M4 scheduled in the next month.

• SWT Snippets (Reloaded)

  Examples are copied from http://www.eclipse.org/swt/snippets/. Snippets are minimal stand-alone programs that demonstrate specific techniques or functionality. Often a small example is the easiest way to understand how to use a particular feature.

Not all the snippets is supported!
Enjoy finding out which J2S SWT Snippets work. J2S SWT is still under developing.

Why is called “Reloaded”?
In the early stage of Java2Script project, SWT Snippets was a showcase page. And it was also a test case page. So this page is just reloaded form former page. The first time I setuped Snippets page, it cost me some time. But as Java2Script project got much improvement. Now, it’s much easier for me to setup the whole SWT Snippets page. And with more and more improvement, I am sure that it will be more convenient to integrate Java2Script application with existed HTML applications(pages).