Interacting with Filesystems - Beginning Java 7 - page 691

Listing 8-1 presents a DumpRoots application that uses listRoots() to obtain
an array of available filesystem roots and then outputs the array's contents.
Listing 8-1. Dumping available filesystem roots to the standard output device
import java.io.File;
class DumpRoots
{
public static void main(String[] args)
{
File[] roots = File.listRoots();
for (File root: roots)
System.out.println(root);
}
}
WhenIrunthisapplicationonmyWindowsXPplatform,Ireceivethefollowingout-
put, which reveals four available roots:
A:\
C:\
D:\
E:\
If I ran DumpRoots on a Unix or Linux platform, I would receive one output line
consisting of the virtual filesystem root ( / ).
Apartfromusing listRoots() ,youcanobtaina File instancebycallinga File
constructorsuchas File(String pathname) ,whichcreatesa File instancethat
stores the pathname string. The following assignment statements demonstrate this
constructor:
File file1 = new File("/x/y");
File file2 = new File("C:\\temp\\x.dat");
ThefirststatementassumesaUnixorLinuxplatform,startsthepathnamewithroot
directorysymbol / ,andcontinueswithdirectoryname x ,separatorcharacter / ,andfile
ordirectoryname y .(ItalsoworksonWindows,whichassumesthispathbeginsatthe
root directory on the current drive.)