Examples of java.nio.file.FileSystem

java.nio.file.FileSystem
Provides an interface to a file system and is the factory for objects to access files and other objects in the file system.
The default file system, obtained by invoking the {@link FileSystems#getDefault FileSystems.getDefault} method, provides access to the file system that isaccessible to the Java virtual machine. The {@link FileSystems} class definesmethods to create file systems that provide access to other types of (custom) file systems.
A file system is the factory for several types of objects:
- The {@link #getPath getPath} method converts a system dependentpath string, returning a {@link Path} object that may be usedto locate and access a file.
- The {@link #getPathMatcher getPathMatcher} method is usedto create a {@link PathMatcher} that performs match operations onpaths.
- The {@link #getFileStores getFileStores} method returns an iteratorover the underlying {@link FileStore file-stores}.
- The {@link #getUserPrincipalLookupService getUserPrincipalLookupService}method returns the {@link UserPrincipalLookupService} to lookup users orgroups by name.
- The {@link #newWatchService newWatchService} method creates a{@link WatchService} that may be used to watch objects for changes andevents.
File systems vary greatly. In some cases the file system is a single hierarchy of files with one top-level root directory. In other cases it may have several distinct file hierarchies, each with its own top-level root directory. The {@link #getRootDirectories getRootDirectories} method may beused to iterate over the root directories in the file system. A file system is typically composed of one or more underlying {@link FileStore file-stores}that provide the storage for the files. Theses file stores can also vary in the features they support, and the file attributes or meta-data that they associate with files.
A file system is open upon creation and can be closed by invoking its {@link #close() close} method. Once closed, any further attempt to accessobjects in the file system cause {@link ClosedFileSystemException} to bethrown. File systems created by the default {@link FileSystemProvider provider}cannot be closed.
A {@code FileSystem} can provide read-only or read-write access to thefile system. Whether or not a file system provides read-only access is established when the {@code FileSystem} is created and can be tested by invokingits {@link #isReadOnly() isReadOnly} method. Attempts to write to file storesby means of an object associated with a read-only file system throws {@link ReadOnlyFileSystemException}.
File systems are safe for use by multiple concurrent threads. The {@link #close close} method may be invoked at any time to close a file system butwhether a file system is asynchronously closeable is provider specific and therefore unspecified. In other words, if a thread is accessing an object in a file system, and another thread invokes the {@code close} methodthen it may require to block until the first operation is complete. Closing a file system causes all open channels, watch services, and other {@link Closeable closeable} objects associated with the file system to be closed. @since 1.7

    private final String ext;
    private final Map<Path, Path> files;


    public NewFileVisitor(Path outputPath, String pattern, String ext,
            Map<Path, Path> files) {
        FileSystem fileSystem = FileSystems.getDefault();
        String fullPattern = pattern;
        if (!pattern.startsWith("glob:") && !pattern.startsWith("regex:")) {
            fullPattern = "glob:" + pattern;
        }
        this.outputPath = outputPath;
        this.ext = ext;
        this.matcher = fileSystem.getPathMatcher(fullPattern);
        this.files = files;
    }

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            List<Path> files = listJars(webInfLibDirectory);


            for (Path p : files) {
                info("LOCATED JAR " + p.toFile().getName());
                jarURLs.add(p.toUri().toURL());
                FileSystem fs = provider.newFileSystem(p, new HashMap<String, Object>());
                Path serviceDirectory = fs.getPath("/META-INF", "services");
                info("SCANNING SERVICES");


                if (Files.exists(serviceDirectory)) {
                    DirectoryStream<Path> serviceListings = Files.newDirectoryStream(serviceDirectory);

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    public TemporaryFolder temporaryFolder = new TemporaryFolder();


    @Before
    public void setup() throws Exception {
        JavaArchive homeArchive = ShrinkWrap.create(JavaArchive.class);
        FileSystem vfs = ShrinkWrapFileSystems.newFileSystem(homeArchive);
        PathManager.getInstance().useOverrideHomePath(temporaryFolder.getRoot().toPath());
        PathManager.getInstance().setCurrentSaveTitle("testSave");


        assert !Files.isRegularFile(vfs.getPath("global.dat"));


        moduleManager = ModuleManagerFactory.create();
        networkSystem = mock(NetworkSystem.class);
        when(networkSystem.getMode()).thenReturn(NetworkMode.NONE);
        CoreRegistry.put(ModuleManager.class, moduleManager);

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     * @throws IOException ShrinkWrap errors
     */
    @Override
    protected void setupPathManager() throws IOException {
        final JavaArchive homeArchive = ShrinkWrap.create(JavaArchive.class);
        final FileSystem vfs = ShrinkWrapFileSystems.newFileSystem(homeArchive);
        PathManager.getInstance().useOverrideHomePath(vfs.getPath(""));
        PathManager.getInstance().setCurrentSaveTitle("world1");
    }

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    private EngineTime mockTime;


    @BeforeClass
    public static void setupEnvironment() throws Exception {
        final JavaArchive homeArchive = ShrinkWrap.create(JavaArchive.class);
        final FileSystem vfs = ShrinkWrapFileSystems.newFileSystem(homeArchive);
        PathManager.getInstance().useOverrideHomePath(vfs.getPath(""));


        if (!setup) {
            setup = true;


            env = new DisplayEnvironment();

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    // Conversions to and from java.io
    File workingPathAsFile = workingPath.toFile();
    Assert.assertEquals(workingPath, workingPathAsFile.toPath());
    
    // FileStore
    FileSystem fileSystem = workingPath.getFileSystem();
    Iterator<Path> rootDirectories = fileSystem.getRootDirectories().iterator();
    Assert.assertEquals(Paths.get("C:\\"), rootDirectories.next());
    Assert.assertEquals(Paths.get("D:\\"), rootDirectories.next());
    
    // Create path relative to other
    Path testPath = workingPath.resolve("target/testDir");

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  }


  @Override
  public Path file(String path, String content) {
    Path file = super.file(path, content);
    FileSystem fileSystem = file.getFileSystem();


    // We have to force the write to disk.
    // ZipFileSystem doesn't respect the SYNC flag.
    try {
      call("beginWrite", fileSystem);

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  private static Path getJarPath(File jar) {
    URI uri = URI.create("jar:" + jar.toURI().toString());
    Map<String, String> env = new HashMap<>();
    env.put("create", "true");
    FileSystem fileSystem;
    try {
      fileSystem = FileSystems.newFileSystem(uri, env);
    } catch (IOException e) {
      throw uncheck(e);
    }
    return fileSystem.getPath("/");
  }

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      if (e.isPopupTrigger()) {
        rightClickMouseMenu.show(e.getComponent(), e.getX(), e.getY());
      }
    }
    public void onLoadImage() {
      FileSystem fs = FileSystems.getDefault();
      path = fs.getPath("/home/max/IdeaProjects/designpatternjava/src/MVCTableDAO/images/");
      JFileChooser chooser = new JFileChooser("/home/max/IdeaProjects/designpatternjava/src/MVCTableDAO/images/");
      int returnValue = chooser.showOpenDialog(null);
      byte[] data;
      if(returnValue == JFileChooser.APPROVE_OPTION) {
        try {

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    DirectoryStream<Path> children = Files.newDirectoryStream(directory);
    for(Path child : children){
      process(StandardWatchEventKinds.ENTRY_CREATE, child);
    }


    FileSystem fileSystem = directory.getFileSystem();


    WatchService watcher = fileSystem.newWatchService();


    try {
      WatchKey key = directory.register(watcher, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_DELETE);
      if(key.isValid()){
        process(key);

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