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As part of the Arch review: > q: what happens if several instances are run using the same userdir? > problems? > a: right :-) > q: a warning should be displayed to the user!
I suggest the launcher (or java part) to create a special file in the user directory on startup and deleteOnExit() it. This could indicate that a user is running the same NetBeans twice and could warn him. Moreover the file could contain a number of port on which the first NetBeans are listening and use it to communicate any commands (move main window to front, open command) to it.
*** This issue has been marked as a duplicate of 32054 ***
verified, closed - it's duplicate.