How to use

mkdirs

method

in

java.io.File

 // Create a directory; all non-existent ancestor directories are
// automatically created
success = (new File("../potentially/long/pathname/without/all/dirs")).mkdirs();
if (!success) {
  // Directory creation failed
}

 // create a File object for the parent directory
File wallpaperDirectory = new File("/sdcard/Wallpaper/");
// have the object build the directory structure, if needed.
wallpaperDirectory.mkdirs();
// create a File object for the output file
File outputFile = new File(wallpaperDirectory, filename);
// now attach the OutputStream to the file object, instead of a String representation
FileOutputStream fos = new FileOutputStream(outputFile);

private static boolean createOrExistsDir(final File file) {
  return file != null && (file.exists() ? file.isDirectory() : file.mkdirs());
}

public InfoWriter(Configuration config, String infoPath) throws IOException {
  this.config = config;
  this.infoPath = infoPath;
  if (infoPath != null) {
    this.infoFile = new File(infoPath);
    if (!infoFile.getParentFile().exists()) {
      infoFile.getParentFile().mkdirs();
    }
  } else {
    this.infoFile = null;
  }
}

private File ensureOutputDirectory() {
  File outputDir = new File(OUTPUT_DIRECTORY);
  if (!outputDir.exists()) {
    outputDir.mkdirs();
  }
  return outputDir;
}

  @Override
  File ensureDirectoryExists( FileSystemAbstraction fileSystem, File dir )
  {
    if ( !dir.exists() && !dir.mkdirs() )
    {
      String message = String.format( "Unable to create directory path[%s] for Neo4j store" + ".",
          dir.getAbsolutePath() );
      throw new RuntimeException( message );
    }
    return dir;
  }
},

 File file = new File("C:\\user\\Desktop\\dir1\\dir2\\filename.txt");
file.getParentFile().mkdirs();
FileWriter writer = new FileWriter(file);

  @Test
  public void shouldNotValidateNestingOfMaterialDirectoriesBasedOnServerSideFileSystem() throws IOException {
    final File workingDir = temporaryFolder.newFolder("go-working-dir");
    final File material1 = new File(workingDir, "material1");
    material1.mkdirs();

    final Path material2 = Files.createSymbolicLink(Paths.get(new File(workingDir, "material2").getPath()), Paths.get(material1.getPath()));

    material.setFolder(material1.getAbsolutePath());
    material.validateNotSubdirectoryOf(material2.toAbsolutePath().toString());

    assertNull(material.errors().getAllOn(FOLDER));
  }
}

public static void ensureFileDirectory(File file) {
  if (file == null) {
    return;
  }
  File parentFile = file.getParentFile();
  if (!parentFile.exists()) {
    parentFile.mkdirs();
  }
}

public void mkdirs() {
  file.getParentFile().mkdirs();
}

public void streamToFile(InputStream stream, File dest) throws IOException {
  dest.getParentFile().mkdirs();
  FileOutputStream out = new FileOutputStream(dest, true);
  try {
    IOUtils.copyLarge(stream, out);
  } finally {
    IOUtils.closeQuietly(out);
  }
}

 File sdCard = Environment.getExternalStorageDirectory();
File dir = new File (sdCard.getAbsolutePath() + "/dir1/dir2");
dir.mkdirs();
File file = new File(dir, "filename");

FileOutputStream f = new FileOutputStream(file);
...

/**
 * create directory
 *
 * @param directoryPath
 */
public static void createDirectory(final String directoryPath) {
  File file = new File(directoryPath);
  if (!file.exists()) {
    file.setReadable(true, false);
    file.setWritable(true, true);
    file.mkdirs();
  }
}

/**
 * Rewrite log file.
 */
protected File getLogFile() {
  File base = getBaseDir();
  base.mkdirs();
  return new File(base,"log");
}

private void addOutputDir(List<String> argv) {
 if (null != m_outputDir) {
  if (!m_outputDir.exists()) {
   m_outputDir.mkdirs();
  }
  if (m_outputDir.isDirectory()) {
   argv.add(CommandLineArgs.OUTPUT_DIRECTORY);
   argv.add(m_outputDir.getAbsolutePath());
  } else {
   throw new BuildException("Output directory is not a directory: " + m_outputDir);
  }
 }
}

 String path = "C:" + File.separator + "hello" + File.separator + "hi.txt";
// Use relative path for Unix systems
File f = new File(path);

f.getParentFile().mkdirs(); 
f.createNewFile();

  @Override
  protected void processDir (Entry entryDir, ArrayList<Entry> value) throws Exception {
    if (!entryDir.outputDir.exists()) {
      if (!entryDir.outputDir.mkdirs())
        throw new Exception("Couldn't create output directory '" + entryDir.outputDir + "'");
    }
  }
}

  @Test
  public void shouldNotValidateNestingOfMaterialDirectoriesBasedOnServerSideFileSystem() throws IOException {
    final File workingDir = temporaryFolder.newFolder("go-working-dir");
    final File material1 = new File(workingDir, "material1");
    material1.mkdirs();

    final Path material2 = Files.createSymbolicLink(Paths.get(new File(workingDir, "material2").getPath()), Paths.get(material1.getPath()));

    pluggableSCMMaterialConfig.setFolder(material1.getAbsolutePath());
    pluggableSCMMaterialConfig.validateNotSubdirectoryOf(material2.toAbsolutePath().toString());

    assertNull(pluggableSCMMaterialConfig.errors().getAllOn(FOLDER));
  }
}

public String createTempFile(String fileName, String contents) throws IOException {
  File f = createAndRegisterTempFile(fileName);
  if (!f.getParentFile().exists()) {
    f.getParentFile().mkdirs();
  }
  f.createNewFile();
  FileUtils.writeFileUtf8(f, contents);
  return f.toURI().toString();
}

public void on() {
  try {
    file.getParentFile().mkdirs();
    Files.newOutputStream(file.toPath()).close();
    get();  // update state
  } catch (IOException | InvalidPathException e) {
    LOGGER.log(Level.WARNING, "Failed to touch "+file);
  }
}