常用资源，工具箱，代码库

Web工程师必备的在线工具箱
http://www.iteye.com/news/26572

下面是Flex4官网提供的，里面介绍了sdk里面基本组件的案例，以及第三方提供的效果，控制等
http://www.adobe.com/devnet-archive/flex/tourdeflex/web/
Flex4 custom skin相关博客
http://saturnboy.com/2009/09/flex4-component-states-skin-states/
http://blog.digitalbackcountry.com/2009/07/building-custom-components-in-flex-4-skinparts/
http://www.unitedmindset.com/jonbcampos/2009/07/02/flex-4-spark-skinning/


Here are some very useful resources for learning java, you can find many sample codes or examples there.
1) http://www.javapractices.com/home/HomeAction.do
2) http://www.javabeginner.com/toc.htm
3) http://java4coders.com/
4) http://vidyapsi.wordpress.com/category/java/ ThinkDifferently