An example of rdio-simple with Java and the Play! framework.
To play with it put your credentials in the RDIO_CONSUMER_KEY and RDIO_CONSUMER_SECRET environment variables.
For example, if you're using Heroku, set your consumer key and consumer secret with:
heroku config:set RDIO_CONSUMER_KEY=mykey
heroku config:set RDIO_CONSUMER_SECRET=mysecret