The code below demonstrates how to obtain file system root available on your system. In Linux, you will have a single root (/) while on Windows you could get C:\ or D:\ that represent the root drives.

package org.kodejava.io;

import java.io.File;

public class FileSystemRoot {
    public static void main(String[] args) {
        // List the available filesystem roots.
        File[] root = File.listRoots();

        // Iterate the entire filesystem roots.
        for (File file : root) {
            System.out.println("Root: " + file.getAbsolutePath());
        }
    }
}

The result of the code snippet:

Root: C:\
Root: D:\
Root: F:\

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Wayan

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