java - Proper default location for storing user generated data -

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i designing (farly big) application company. application users can generate content in form of xml documents, might want share among each other.

it might seem trivial question @ first, need default location when user clicks save button. unfortunately there different operating systems , haven't worked of them, don't know common thing do. .jar executed anywhere , current execution directory doesn't seem professional solution. neither desktop. there way proper system depended location use? on windows c:/program files/application_name or c:/users/user/appdata/application_name used. in research stumbled upon c:/documents , settings/all users/application data/


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