Adobe FlexRich Internet Applications and Flex are taking off. Many developers need to learn Flex fast. This refcard will help readers get started learning Flex. Firstly, a simple “Hello, World” application which will help familiarize readers with the Flex Builder tool and programming model. Secondly, we'll go into depth about how to connect Flex applications to back-end data through RESTful XML and SOAP. And lastly, “Remoting and Messaging with Java” walks through how to easily connect to a Java back-end with the open source BlazeDS product.