First you need to Download the Camel distribution; or you could grab the Source and try Building it yourself.
Then come back here, and you might want to read the following documentation before continuing:
To get started with Camel:
Create a CamelContext.
Add whatever routing rules you wish using the DSL and
RouteBuilderor using XML DSL.
Start the Camel context.
When your application is closing you may wish to stop the context