GWT allows developers to write client-side applications in Java and have them run as highly optimized JavaScript. It provides tools to develop Ajax applications that are faster than traditional JavaScript. The GWT workflow involves writing code in Java, compiling it to JavaScript, and deploying the compiled code on the web. A simple "Hello World" example demonstrates creating a click handler in Java that triggers a JavaScript alert when a button is clicked.

1. ALGERIA JUG
GWT
Google Web Toolkit
Hacen Dadda
@hacentech

2. Google Web Toolkit
● Googel announced GWT at
theJavaOne 2006
● Developement toolkit, not a framework
● One codebase, any browser
● Makes Ajax a priece of cake... and faster

3. Code in Java, run as javascript

4. We love each other !

5. How does it works ?

6. From Java to the browser

7. Tools
Eclipse GWT SDK GWT plugin

11. GWT plugin

12. Client/Server
Client GWT
Server Java

13. Hello World
public class HelloWorld implements EntryPoint
{
public void onModuleLoad ()
{
Button button = new Button("Click Me");
button.addClickHandler(new HelloButtonClickHandler());
RootPanel.get().add(button);
}
class HelloButtonClickHandler implements ClickHandler
{
public void onClick (ClickEvent event)
{
Window.alert("Hello World");
}
}
}

14. Hello World

15. RPC diagram

16. Done ! Compile project
We need just this !

17. Let us go on the web
war/ Rename (as u like)
site/

18. Here we go !

19. </presentation>
Thank you =)
@hacentech
hacendadda@gmail.com