Java JMF Manager.CreatePlayer() URL format QUERY

Hello,

I am trying to write an application that implements the Java JMF API
using Intel's SDK.

The query I have is how do I pass a local file name (i.e. the
location/name of my mpg/avi) to manager.createplayer() when this method
appears only to accept a complete (URL, file) parameter.

If there is a way to use getdocumentbase() for a local file system, this
would be ideal. Can I extend this and pass my own absolute directory
address instead?

Thanks.