Java2Script already released final 1.0.0 release in this October.

Java2Script (Also known as J2S: http://j2s.sourceforge.net/ ) Pacemaker provides an Eclipse Java to JavaScript compiler plugin and an implementation of JavaScript version of Eclipse Standard Widget Toolkit (SWT) with other common utilities, such as java.lang.* and java.util.*. You can convert your SWT-base Rich Client Platform (RCP) into Rich Internet Application (RIA) by Java2Script Pacemaker. Java2Script is open sourced under Eclipse Public License 1.0.

Java2Script may be considered similar to GWT( http://code.google.com/webtoolkit/ ) and Eclipse RAP( http://www.eclipse.org/rap/ ). For Java2Script v.s. GWT, both provide Eclipse JDT based Java to JavaScript compiler, but GWT provides its own widget toolkits while Java2Script uses Eclipse SWT directly. For Java2Script v.s. RAP, both have goals to provide ways for developers to share the same base of code for products that deploy to the web and the desktop, but RAP uses RWT API instead of SWT API and is server oriented while Java2Script use pure SWT API and is client(browser) oriented.

For overview of Java2Script, please visit: http://j2s.sourceforge.net/overview.html . For more inside technical details about Java2Script, please visit: http://inside.java2script.com/

Feature List of 1.0.0
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Java2Script Core
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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
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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
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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
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1. Support JUnit tests both Test Case and Test Suite in text mode.

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