Author Archives: Zhou Renjian

Performance Matters or Not

Posted on September 24, 2007 by Zhou Renjian

Joel Spolsky had a post “Strategy Letter VI“. And I did agree with him to some degree when reading the post. And I decided to write a post about these opinions related to Java2Script later in the evening. And later … Continue reading →

Posted in Architecture, GWT, Hacks, JavaScript, SWT | 3 Comments

Performance of Comet and Simple Pipe

Posted on September 13, 2007 by Zhou Renjian

About one and a half months ago, I introduced Java2Script Simple Pipe, another Comet implementation. At that time, I knew there were lots of performance issues on such Comet technology. Because at that time I were busy and it was … Continue reading →

Posted in Architecture, Articles, Comet, JavaScript | Leave a comment

Java != JavaScript

Posted on September 11, 2007 by Zhou Renjian

The cry-out of “Java != JavaScript” is not a new expression. I learned it in year 2001 when I started learning JavaScript. But as “Java2Script” project, it links “Java” and “JavaScript” together by a Java to JavaScript compiler. It is … Continue reading →

Posted in GWT, Java, JavaScript | 1 Comment

JavaScript’s Defects on Numbers

Posted on August 5, 2007 by Zhou Renjian

Number larger than 0×20000000000000 (54bit) will not be reliable. Here is the test script: javascript:alert (0x1ffffffffffffe); javascript:alert (0x1fffffffffffff); javascript:alert (0×20000000000000); javascript:alert (0×20000000000001); You can see that the latter two numbers are same number in JavaScript! Conclusion The safe number range … Continue reading →

Posted in JavaScript | Leave a comment

Introducing Java2Script’s Simple Pipe

Posted on August 1, 2007 by Zhou Renjian

Communications between server and browser are essential things in AJAX world. Basic Knowledge Each HTTP connection is forked by browser. And one HTTP connection may serve multiple sessions in HTTP 1.1 but server only one session in HTTP 1.0. There … Continue reading →

Posted in Architecture, Browser, JavaScript | 4 Comments

Demo: Java2Script Google Talk in SWT

Posted on July 30, 2007 by Zhou Renjian

Pre-words In March, I wrote “Java2Script version of Google Talk”. It was a very simple SWT application that talks to talk.google.com using Jabber XMPP protocol by Smack library. About 3 months later, I rewrote the whole Java2Script version of Google … Continue reading →

Posted in Demo, SWT | 13 Comments

Regarding GWT

Posted on July 1, 2007 by Zhou Renjian

You must already know GWT if you learn Java2Script by “Java to JavaScript compiler”. I seldom mentioned GWT in “Java2Script” topics in the past, except an article “GWT v.s. Java2Script SWT” in early days when GWT was announced. But late … Continue reading →

Posted in Architecture, GWT | Leave a comment

Asynchrony is Everything

Posted on June 29, 2007 by Zhou Renjian

You may know “Position is Everything” already. And I believe you should also know “Asynchony is Everything” or “Everything is Asynchronous” in RIA development. Asynchrony is not only very important in web application development but also vital in normal desktop … Continue reading →

Posted in Architecture, Hacks | Leave a comment

Browser Statistics Among Web Developers

Posted on June 16, 2007 by Zhou Renjian

Here are some numbers about browsers used among web developers: 1. Firefox 54.63% 2. Internet Explorer 38.10% 3. Opera 3.84% 4. Safari 1.56% 5. Mozilla 1.34% Firefox versions: 1. 2.0.0.3 50.74% 2. 2.0.0.4 30.25% 3. 1.5.0.11 6.05% 4. 1.5.0.12 3.65% … Continue reading →

Posted in Architecture, Browser | Leave a comment

QoS of JavaScript

Posted on June 12, 2007 by Zhou Renjian

You must be aware of QoS when you are writing Rich Internet Application (RIA), especially when you are using AJAX. Why? And what aspects should be considered in QoS of RIA? Here are some points: 1. Loading JavaScript file *.js … Continue reading →

Posted in Architecture, Hacks, JavaScript | Leave a comment