Enums for System.getProperty(...) method in Java API?

Just had a thought today as a result of a colleaugue mis-spelling "file.separator" in a System.getProperty() call:
How about an enum for the above method (e.g. SystemProperty) that has all the known properties and the String method for any prop not included in the enum?
Am I being too greedy or pedantic about type-safety?
Appreciate your feedback.
Cheers,
Ali
Edited by: user7627452 on 30-Apr-2012 19:09

Yes. The whole idea is that anybody can add their own. As opposed to an API.

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