Java Utililty Methods Path File Name nio

List of utility methods to do Path File Name nio

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Description

The list of methods to do Path File Name nio are organized into topic(s).

Method

StringfileName(final Path thePath)
file Name 
return fileName(thePath.getFileName().toString());
PathfilterJarContainingClass(Collection jarsPaths, String className)
filter Jar Containing Class 
for (File file : jarsPaths) {
    JarFile jarFile = new JarFile(file);
    if (containsClass(jarFile, className)) {
        return file.toPath();
return null;
ListfindExecutablePaths(String executableName)
Locates an executable in the current system. 
return findExecutablePaths(executableName, Integer.MAX_VALUE);
PathfindFile(Path directoryPath, String fileName)
find File 
File[] files = directoryPath.toFile().listFiles();
if (files != null) {
    for (File file : files) {
        if (file.isFile()) {
            if (file.getName().equals(fileName)) {
                return file.toPath();
        } else if (file.isDirectory()) {
...
FilefindFile(String basePath, final String fileName)
TODO dir cache 
Path startPath = Paths.get(basePath);
final List<File> fileResult = new ArrayList<>();
Files.walkFileTree(startPath, new SimpleFileVisitor<Path>() {
    @Override
    public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {
        return FileVisitResult.CONTINUE;
    @Override
...
StringfindNextFileName(Path folder, String name)
find Next File Name 
Path file = folder.resolve(name);
if (!Files.exists(file)) {
    return name;
String a = getNamePart(file);
String b = getExtPart(file);
if (b.length() > 0) {
    b = "." + b;
...
PathfindRootPathForResource(String resourceName, ClassLoader classLoader)
Find the root path for the given resource. 
Objects.requireNonNull(resourceName, "resourceName");
Objects.requireNonNull(classLoader, "classLoader");
URL resource = classLoader.getResource(resourceName);
if (resource != null) {
    String protocol = resource.getProtocol();
    if (protocol.equals("jar")) {
        return getJarPathFromUrl(resource);
    } else if (protocol.equals("file")) {
...
OptionalfindUpward(String filename, Path startingPath)
Find a file with the given base name, searching upward from the given starting directory. 
Preconditions.checkNotNull(filename);
Preconditions.checkArgument(!filename.contains(File.separator));
Preconditions.checkArgument(Files.isDirectory(startingPath));
Path possibleRootDir = startingPath;
while (possibleRootDir != null) {
    Path possiblePath = possibleRootDir.resolve(filename);
    if (Files.isRegularFile(possiblePath)) {
        return Optional.of(possiblePath);
...
StringformatPathName(Path path)
Format the file/diretory information as specified in RFC 
int thisYear, node = 1;
Locale fileLocale = new Locale("en");
String user = "user", group = "group";
String dateString, permission;
GregorianCalendar fileDate = new GregorianCalendar();
thisYear = fileDate.get(Calendar.YEAR);
if (Files.isDirectory(path))
    permission = "d---------";
...
StringgetAbsolutePath(String fileName)
Returns the absolute path to a file with name fileName 
return Paths.get(fileName).toAbsolutePath().toString();