
18 Introducing Flex
■ Adobe® Flex™ 2 SDK (software development kit)
■ Adobe® Flex™ Builder™ 2
■ Adobe® Flex™ Data Services 2
■ Adobe® Flex™ Charting 2
This section contains an overview of the Flex product line and of Flash Player.
About Flash Player 9
While Flex applications run in a browser, they take advantage of the Flash Player 9 runtime
environment for executing client-side logic, rendering graphics, and playing animation,
audio, or video. Flash Player 9 supports a new higher-performance version of ActionScript
(ActionScript 3.0) that works in conjunction with the expressiveness innovations in Flash
Player 8. Flash Player provides the platform for interface development so that both client and
presentation-tier logic executes on the client computer. Because Flash Player runs consistently
across all major operating systems and browsers, you do not have to program your
applications for a specific browser or platform.
Additionally, Flex applications running in Flash Player 9 can interact with JavaScript logic or
HTML content that is displayed in the browser. As a result, you can incorporate Flex into an
existing web site or application, including working with other browser-based frameworks such
as Ajax widgets or JavaScript libraries.
For more information, see “Deploying Flex applications on Flash Player” on page 25.
About Flex Software Development Kit 2
At the core of the Flex product line is the Flex Software Development Kit (SDK). Flex 2 SDK
is the base set of technologies and utilities that you use to create applications by using the Flex
product line. Flex 2 SDK consists of the Flex framework (class library), the Flex compilers, the
debugger, the MXML and ActionScript programming languages, and other utilities. Flex
SDK also includes the source code for the core Flex framework class library, enabling you to
study the code of the classes as well as customize or extend them for your own use.
Flex SDK is available as a stand-alone package or as an integrated feature of Flex Builder and
Flex Data Services.
For more information about building applications by using Flex 2 SDK, see “Flex deployment
models” on page 25.
Flex applications consist of MXML and ActionScript source files:
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