// files/FileSystemDemo.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.nio.file.*;

public class FileSystemDemo {

static void show(String id, Object o) {

System.out.println(id + ": " + o);

}

public static void main(String[] args) {

System.out.println(System.getProperty("os.name"));

FileSystem fsys = FileSystems.getDefault();

for(FileStore fs : fsys.getFileStores())

show("File Store", fs);

for(Path rd : fsys.getRootDirectories())

show("Root Directory", rd);

show("Separator", fsys.getSeparator());

show("UserPrincipalLookupService",

fsys.getUserPrincipalLookupService());

show("isOpen", fsys.isOpen());

show("isReadOnly", fsys.isReadOnly());

show("FileSystemProvider", fsys.provider());

show("File Attribute Views",

fsys.supportedFileAttributeViews());

}

}

/* Output:

Windows 10

File Store: SSD (C:)

Root Directory: C:\

Root Directory: D:\

Separator: \

UserPrincipalLookupService:

sun.nio.fs.WindowsFileSystem$LookupService$1@15db9742

isOpen: true

isReadOnly: false

FileSystemProvider:

sun.nio.fs.WindowsFileSystemProvider@6d06d69c

File Attribute Views: [owner, dos, acl, basic, user]

*/