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I'm going to answer in the context of Flex 2, which will ship soon. To be a good Flex 2 developer, it will be very important to understand the new APIs of Flash Player 9 ... classes such as EventDispatcher, DisplayObject, RegExp, XML, etc. But you don't need experience with the Flash authoring tool unless you want to create vector graphics by hand. You can make very attractive graphic designs for Flex business applicatons (if that's what you mean by "better designs") simply by using CSS styles and programmatic skins in Flex.
Are these API's are included in AS 3.0 documentation ? , or these comes separatly with FLASH PLAYER 9.0.
I have books of Flex 1.5.
Are Books or Study material is available for Flex 2.0 and AS 3.0.
Yes, the API's are included in the AS 3.0 language reference available at
You might also find the following link on "Programming ActionScript 3.0" useful.
Flex SDK Development Team
well vinay if u r thinking about -- Flex Front End to Your Struts Applications
Struts is an open source framework that facilitates the development of web applications based on Java servlets and other related technologies. Because it provides a solution to many of the common problems developers face when building these applications, Struts has been widely adopted in a large variety of development efforts, from small projects to large-scale enterprise applications.
Although Struts greatly facilitates the task of developers, it doesn't do much to improve the end-user experience: the end-result is still an application delivered in HTML and using the traditional HTTP request/response mechanism.
Developers—and organizations in general—are increasingly looking for solutions to provide their applications with a more engaging user experience that overcomes the limitations of HTML.
Macromedia Flex is a presentation server that addresses this requirement and allows developers to build a new generation of Rich Internet Applications (RIAs) that combine the usability of desktop applications with the reach of traditional web applications.