All About GWT - A set of tools for building AJAX apps in the Java language.

1. Google Web Toolkit
By
Kaushik Sahoo
Mindfire Solutions
Date: Oct 30, 2013

2. What is GWT?

A set of tools for building AJAX apps in the Java
language

Write, run, test, and debug in Java

Is it a compiler?

3. Why?
Handwritten Scripts vs GWT

Poor Usability
•
history, bookmarks

Poor Tool Support
•
Limited IDE support
•
Debugging too often boils down to window.alert()
•
Profilers? Findbugs?

4. Why?
Handwritten Scripts vs GWT

Hard to test
•
JUnit support for GWT

Quality Risks
•
New categories of runtime-only bugs (e.g. spelling bugs)
1047:
x.compnent = getValue("x");
•
Poor JS reuse model encourages "from scratch" or copy/paste

5. Why?
Handwritten Scripts vs GWT

Hard for large teams to work on the same code
base

Auto Complete

Browser Compatibility
Remember our Dear friend IE !!!

6. All these points start to matter a lot for big projects
What is the Solution?
Can Java be used for client-side scripting?
More or less, the impossible…

7. Unless you translate Java into JavaScript

8. GWT Features



HTML 5 support
Mobile Web support
Cross-browser?
An abstract DOM class





History class - Demo
RPC
Widgets
JSNI
Presentation - CSS

9. Widgets and Panels
Demos at Showcase

10. RPC


GWT supports various ways to communicate with
the server JSON, XML etc.
But a pure Java RPC interface would be awesome.
Isn't it?

12. JSNI

JavaScript Native Interface
public static native void alert(String msg) /*-{
$wnd.alert(msg);
}-*/;

13. Things to know...

Technology second, users first.

It isn't Java vs Javascript or Java vs everything else.

Download exactly what you need.

GWT Team slogan: the bling is on the inside

Hosted mode

14. Question and
Answer

15. Thank you