Comments on: GWT v.s. Java2Script SWT

By: Inside Java2Script » Blog Archive » Regarding GWT

Inside Java2Script » Blog Archive » Regarding GWT — Sun, 01 Jul 2007 15:16:30 +0000

[…] seldom mentioned GWT in “Java2Script” topics in the past, except an article “GWT v.s. Java2Script SWT” in early days when GWT was […]

By: Zhou Renjian

Zhou Renjian — Mon, 07 Aug 2006 16:44:28 +0000

@Jason
“…attaching RPC web-services is a bit clunky…”
Currently Java2Script is still not attaching RPC web-services. Maybe Java2Script will try to provide some interfaces instead of implementations. I am thinking and studying about this these days.

By: Zhou Renjian

Zhou Renjian — Mon, 07 Aug 2006 16:39:52 +0000

The tutorials of J2S are out of date (I will try to update them in this month). For your problem, you should add some necessary libraries, like j2s-core-common.z.js in the builder page.

There are some few words about these at:
http://j2s.sourceforge.net/overview.html#using-j2s

And theoretically developing a JavaScript version of SWING by Java2Script could be feasible. But currently Java2Script project has no plan for such a things. And I think Java2Script will not support Netbeans IDE. It’s because Java2Script relies heavily on Eclipse JDT plugin.

By: D

Mon, 07 Aug 2006 15:44:36 +0000

Can j2s (or another free tool) compile a Netbeans Swing UI into javascript? I begin with a JFrame Form. If so, then how?

In Tutorial of J2S in Eclipse (1): Hello J2S World, I am using Eclipse SDK version 3.1.1. But I do not have “Pattern” under the Java2Script compiler is enabled button, which is in the Java2Script Builder page, in the Hello J2S World section. I do get “Run as Java2Script Application”. But maybe I did not get the automatic build of the *.js?

My runtime error is Line 1: ‘Clazz’ is undefined.
When I debug, it shows:
Clazz.declarePackage (”net.sf.j2s.hello”);
in HelloJ2SWorld.js

By: Jason Thomas

Jason Thomas — Sat, 05 Aug 2006 21:48:03 +0000

This is flippin’ amazing. Hats off to you! I’ve used GWT off and on since it came out. I was shocked about how similar it was to Swing/SWT. As far as I can tell it’s a work in progress. The simple widgets it provides can produce a pretty sophisticated web-application, although attaching RPC web-services is a bit clunky, and there are quite a few bugs and caveats.

I’m currently developing a Db4o backed signup sheet for a physics project I work on (Trying to keep to MVC, and attaching Ruby on RAILS like validations, although this is difficult because GWT doesn’t implement reflection). But this, this ‘is’ SWT, you’ve nearely implemented the entire kitchen sink for SWT. When I saw GWT, I thought to myself that this was the beginning of an era beyond CGI, where desktop applicaiton engineers, and professional software developers could use the web as merely a user interface. Apparently it’s a hell of a lot closer than I thought.

By: Sriram Narayanan

Sriram Narayanan — Fri, 16 Jun 2006 23:02:52 +0000

I learnt of j2s from the GWT forums. This seems interesting. The ebst if the license.

By: Josson Smith

Josson Smith — Sun, 28 May 2006 00:23:09 +0000

@Hannes
Thanks for your wishes.

By: Hannes P.

Hannes P. — Mon, 22 May 2006 19:55:58 +0000

I now have spent almost a week of testing gwt and j2s and I must say that i think that j2s is IMHO much better than gwt. Mainly that it is integrated so well in eclipse, makes it really easy to make web applications. So please keep up your work, and I wish you the best!

By: Josson Smith

Josson Smith — Mon, 22 May 2006 16:16:19 +0000

@Eelco
I think J2S will take its best to help developers for a better web applications.

@Jim
I will take annotations as a feature request for J2S.

But “Java 5 bytecodes annotations” (?) may not be implemented as J2S mainly focus on Java Source not Java bytecodes.

Welcome to the world of J2S.

By: Jim White

Jim White — Mon, 22 May 2006 05:16:46 +0000

I too just learned of J2S as a result of starting to use GWT.

A great feature of J2S is that the Java-to-JavaScript compiler is open source while GWT’s compiler is free but no source.

I hope you will add GWT compiler compatibility to J2S so that we can compile the GWT runtime with it.

I am especially interested in an implementation in which the GWT annotations are compiled into Java 5 bytecode annotations which can then be compiled by J2S.