The RichFaces is an advanced UI component framework which is easily integrating Ajax capabilities into JavaServer Faces application. RichFaces mainly designed to integrate with JSF so that we can easily create user interface.
RichFaces provides components that manage the processing of information, requests, and updates. Some important component are <a4j:queue>, <a4j:log> and <a4j:status>.
These components provides to process information and log also.
It consist of a small, generalized set of font and color parameters that can be applied to multiple different styles. It avoids repetitive coding and duplication in CSS files. CSS files are not completely replaced. skins work as a high-level extension to standard CSS.
Component Development Kit (CDK)
The CDK is used to speed up RichFaces components development. It avoids lots of similar configuration elements.
CDK uses its own RichFaces CDK naming conventions for classes, components and tags.
RichFaces library provides Ajax Action Components <a4j:commandButton>, <a4j:commandLink>, <a4j:poll>and<a4j:support>etc. we can use that to send Ajax requests from the client side.