Java Default FileSystem Root.

Question

If I want to program file System specifiers in a platform generic way in java, I call
System.getProperty("file.separator");
So I know the correct version of slash to use, wherever my program is run.
On Unix, the root of the file system is /
windows, the root is c: by default.
What is the platform independent way to specify or enquire after the
file system root specifier applicable, irrespective of the Operating System
that the present Java program and JVM is on?

Answer 1

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What is the platform independent way to specify or enquire after the
file system root specifier applicable, irrespective of the Operating System
that the present Java program and JVM is on?
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It is not clear what information you need or what you are trying to do.
Can you provide an example of the information you want and how you plan to use it?
Have you looked at the listRoots() method of the File class? That method will return the available roots. If the roots start with a slash you know that they aren't windows.
http://docs.oracle.com/javase/1.4.2/docs/api/java/io/File.html
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The prefix concept is used to handle root directories on UNIX platforms, and drive specifiers, root directories and UNC pathnames on Microsoft Windows platforms, as follows:
•For UNIX platforms, the prefix of an absolute pathname is always "/". Relative pathnames have no prefix. The abstract pathname denoting the root directory has the prefix "/" and an empty name sequence.
•For Microsoft Windows platforms, the prefix of a pathname that contains a drive specifier consists of the drive letter followed by ":" and possibly followed by "\" if the pathname is absolute. The prefix of a UNC pathname is "\\"; the hostname and the share name are the first two names in the name sequence. A relative pathname that does not specify a drive has no prefix.