Platform independent way to fire off external applications/helpers by file type?

For example, one application that I'm working on stores PDF files into a database, then can pull them back out for display. I've got a call in there using Runtime.exec to do a "cmd /c start " plus the PDF file开发者_开发百科name. Works great for Windows. Would prefer to find a platform independent way (trying to avoid OS detection with alternate methods for various OS) to do this though as we also run the software on Solaris and Mac.

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Look at Desktop which has a open method and that would be platform independent.

Launches the associated application to open the file.

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I'd be interested to see if there is a 'correct' answer for this. If I were to do this, I'd have a properties file mapping of OS to the command needed to run, and then resolve the OS at runtime.

Eg in a properties file:

windows=cmd /c start
mac=open #(I think)
linux=... etc