John Lu

When you say you don't have to load all the data into the browser, it is a workaround, not a solution. You have to consider the server response. Consider a tree, if a user clicks a node and have to wait the data to load and then expend. It is not a good user expierence.

Go http://flex.org/showcase/ and experience some of the applications. You probably will see a new generation of web application is coming. Many sites will be re-written!

<servlet-class>hall/SomeServlet</servlet-class>

should be something like:

<servlet-class>hall.SomeServlet</servlet-class>

I don't think GWT will kill Flash. For some application, JavaScript just can't do it. As I know some big companies began to adopt Flash/Flex as their front end. You'll see more and more Flash application. Here is an example JavaScript can't handle. docjar.org is an application has almost all Java APIs. It is a Flash app. That amount of data will crash a browser if it was written in JavaScript.