API question - get all download url's for files in a folder (Java app)

I have various shared folders in Box. For a given folder (for which I have the shared URL), I would like to iterate over all the files in that folder and obtain just the download URL's. I would then like to put these into a JSON array for further processing.

Is this possible with a single API call or must I first build a list of all the file ID's in the folder, then get the info for each file?

Any Java examples would be appreciated!

Thanks