# java.nio.file Added in[API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) # java.nio.file ## Interfaces |-------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [CopyOption](https://developer.android.com/reference/java/nio/file/CopyOption) | An object that configures how to copy or move a file. | | [DirectoryStream](https://developer.android.com/reference/java/nio/file/DirectoryStream)\ | An object to iterate over the entries in a directory. | | [DirectoryStream.Filter](https://developer.android.com/reference/java/nio/file/DirectoryStream.Filter)\ | An interface that is implemented by objects that decide if a directory entry should be accepted or filtered. | | [FileVisitor](https://developer.android.com/reference/java/nio/file/FileVisitor)\ | A visitor of files. | | [OpenOption](https://developer.android.com/reference/java/nio/file/OpenOption) | An object that configures how to open or create a file. | | [Path](https://developer.android.com/reference/java/nio/file/Path) | An object that may be used to locate a file in a file system. | | [PathMatcher](https://developer.android.com/reference/java/nio/file/PathMatcher) | An interface that is implemented by objects that perform match operations on paths. | | [SecureDirectoryStream](https://developer.android.com/reference/java/nio/file/SecureDirectoryStream)\ | A`DirectoryStream`that defines operations on files that are located relative to an open directory. | | [Watchable](https://developer.android.com/reference/java/nio/file/Watchable) | An object that may be registered with a watch service so that it can be*watched*for changes and events. | | [WatchEvent](https://developer.android.com/reference/java/nio/file/WatchEvent)\ | An event or a repeated event for an object that is registered with a[WatchService](https://developer.android.com/reference/java/nio/file/WatchService). | | [WatchEvent.Kind](https://developer.android.com/reference/java/nio/file/WatchEvent.Kind)\ | An event kind, for the purposes of identification. | | [WatchEvent.Modifier](https://developer.android.com/reference/java/nio/file/WatchEvent.Modifier) | An event modifier that qualifies how a[Watchable](https://developer.android.com/reference/java/nio/file/Watchable)is registered with a[WatchService](https://developer.android.com/reference/java/nio/file/WatchService). | | [WatchKey](https://developer.android.com/reference/java/nio/file/WatchKey) | A token representing the registration of a[watchable](https://developer.android.com/reference/java/nio/file/Watchable)object with a[WatchService](https://developer.android.com/reference/java/nio/file/WatchService). | | [WatchService](https://developer.android.com/reference/java/nio/file/WatchService) | A watch service that*watches*registered objects for changes and events. | ## Classes |----------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Files](https://developer.android.com/reference/java/nio/file/Files) | This class consists exclusively of static methods that operate on files, directories, or other types of files. | | [FileStore](https://developer.android.com/reference/java/nio/file/FileStore) | Storage for files. | | [FileSystem](https://developer.android.com/reference/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. | | [FileSystems](https://developer.android.com/reference/java/nio/file/FileSystems) | Factory methods for file systems. | | [LinkPermission](https://developer.android.com/reference/java/nio/file/LinkPermission) | The`Permission`class for link creation operations. | | [Paths](https://developer.android.com/reference/java/nio/file/Paths) | This class consists exclusively of static methods that return a[Path](https://developer.android.com/reference/java/nio/file/Path)by converting a path string or[URI](https://developer.android.com/reference/java/net/URI). | | [SimpleFileVisitor](https://developer.android.com/reference/java/nio/file/SimpleFileVisitor)\ | A simple visitor of files with default behavior to visit all files and to re-throw I/O errors. | | [StandardWatchEventKinds](https://developer.android.com/reference/java/nio/file/StandardWatchEventKinds) | Defines the*standard*event kinds. | ## Enums |------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------| | [AccessMode](https://developer.android.com/reference/java/nio/file/AccessMode) | Defines access modes used to test the accessibility of a file. | | [FileVisitOption](https://developer.android.com/reference/java/nio/file/FileVisitOption) | Defines the file tree traversal options. | | [FileVisitResult](https://developer.android.com/reference/java/nio/file/FileVisitResult) | The result type of a[FileVisitor](https://developer.android.com/reference/java/nio/file/FileVisitor). | | [LinkOption](https://developer.android.com/reference/java/nio/file/LinkOption) | Defines the options as to how symbolic links are handled. | | [StandardCopyOption](https://developer.android.com/reference/java/nio/file/StandardCopyOption) | Defines the standard copy options. | | [StandardOpenOption](https://developer.android.com/reference/java/nio/file/StandardOpenOption) | Defines the standard open options. | ## Exceptions |----------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [AccessDeniedException](https://developer.android.com/reference/java/nio/file/AccessDeniedException) | Checked exception thrown when a file system operation is denied, typically due to a file permission or other access check. | | [AtomicMoveNotSupportedException](https://developer.android.com/reference/java/nio/file/AtomicMoveNotSupportedException) | Checked exception thrown when a file cannot be moved as an atomic file system operation. | | [ClosedDirectoryStreamException](https://developer.android.com/reference/java/nio/file/ClosedDirectoryStreamException) | Unchecked exception thrown when an attempt is made to invoke an operation on a directory stream that is closed. | | [ClosedFileSystemException](https://developer.android.com/reference/java/nio/file/ClosedFileSystemException) | Unchecked exception thrown when an attempt is made to invoke an operation on a file and the file system is closed. | | [ClosedWatchServiceException](https://developer.android.com/reference/java/nio/file/ClosedWatchServiceException) | Unchecked exception thrown when an attempt is made to invoke an operation on a watch service that is closed. | | [DirectoryIteratorException](https://developer.android.com/reference/java/nio/file/DirectoryIteratorException) | Runtime exception thrown if an I/O error is encountered when iterating over the entries in a directory. | | [DirectoryNotEmptyException](https://developer.android.com/reference/java/nio/file/DirectoryNotEmptyException) | Checked exception thrown when a file system operation fails because a directory is not empty. | | [FileAlreadyExistsException](https://developer.android.com/reference/java/nio/file/FileAlreadyExistsException) | Checked exception thrown when an attempt is made to create a file or directory and a file of that name already exists. | | [FileSystemAlreadyExistsException](https://developer.android.com/reference/java/nio/file/FileSystemAlreadyExistsException) | Runtime exception thrown when an attempt is made to create a file system that already exists. | | [FileSystemException](https://developer.android.com/reference/java/nio/file/FileSystemException) | Thrown when a file system operation fails on one or two files. | | [FileSystemLoopException](https://developer.android.com/reference/java/nio/file/FileSystemLoopException) | Checked exception thrown when a file system loop, or cycle, is encountered. | | [FileSystemNotFoundException](https://developer.android.com/reference/java/nio/file/FileSystemNotFoundException) | Runtime exception thrown when a file system cannot be found. | | [InvalidPathException](https://developer.android.com/reference/java/nio/file/InvalidPathException) | Unchecked exception thrown when path string cannot be converted into a[Path](https://developer.android.com/reference/java/nio/file/Path)because the path string contains invalid characters, or the path string is invalid for other file system specific reasons. | | [NoSuchFileException](https://developer.android.com/reference/java/nio/file/NoSuchFileException) | Checked exception thrown when an attempt is made to access a file that does not exist. | | [NotDirectoryException](https://developer.android.com/reference/java/nio/file/NotDirectoryException) | Checked exception thrown when a file system operation, intended for a directory, fails because the file is not a directory. | | [NotLinkException](https://developer.android.com/reference/java/nio/file/NotLinkException) | Checked exception thrown when a file system operation fails because a file is not a symbolic link. | | [ProviderMismatchException](https://developer.android.com/reference/java/nio/file/ProviderMismatchException) | Unchecked exception thrown when an attempt is made to invoke a method on an object created by one file system provider with a parameter created by a different file system provider. | | [ProviderNotFoundException](https://developer.android.com/reference/java/nio/file/ProviderNotFoundException) | Runtime exception thrown when a provider of the required type cannot be found. | | [ReadOnlyFileSystemException](https://developer.android.com/reference/java/nio/file/ReadOnlyFileSystemException) | Unchecked exception thrown when an attempt is made to update an object associated with a[read-only](https://developer.android.com/reference/java/nio/file/FileSystem#isReadOnly())`FileSystem`. | - ## Interfaces - [CopyOption](https://developer.android.com/reference/java/nio/file/CopyOption) - [DirectoryStream](https://developer.android.com/reference/java/nio/file/DirectoryStream) - [DirectoryStream.Filter](https://developer.android.com/reference/java/nio/file/DirectoryStream.Filter) - [FileVisitor](https://developer.android.com/reference/java/nio/file/FileVisitor) - [OpenOption](https://developer.android.com/reference/java/nio/file/OpenOption) - [Path](https://developer.android.com/reference/java/nio/file/Path) - [PathMatcher](https://developer.android.com/reference/java/nio/file/PathMatcher) - [SecureDirectoryStream](https://developer.android.com/reference/java/nio/file/SecureDirectoryStream) - [Watchable](https://developer.android.com/reference/java/nio/file/Watchable) - [WatchEvent](https://developer.android.com/reference/java/nio/file/WatchEvent) - [WatchEvent.Kind](https://developer.android.com/reference/java/nio/file/WatchEvent.Kind) - [WatchEvent.Modifier](https://developer.android.com/reference/java/nio/file/WatchEvent.Modifier) - [WatchKey](https://developer.android.com/reference/java/nio/file/WatchKey) - [WatchService](https://developer.android.com/reference/java/nio/file/WatchService) - ## Classes - [Files](https://developer.android.com/reference/java/nio/file/Files) - [FileStore](https://developer.android.com/reference/java/nio/file/FileStore) - [FileSystem](https://developer.android.com/reference/java/nio/file/FileSystem) - [FileSystems](https://developer.android.com/reference/java/nio/file/FileSystems) - [LinkPermission](https://developer.android.com/reference/java/nio/file/LinkPermission) - [Paths](https://developer.android.com/reference/java/nio/file/Paths) - [SimpleFileVisitor](https://developer.android.com/reference/java/nio/file/SimpleFileVisitor) - [StandardWatchEventKinds](https://developer.android.com/reference/java/nio/file/StandardWatchEventKinds) - ## Enums - [AccessMode](https://developer.android.com/reference/java/nio/file/AccessMode) - [FileVisitOption](https://developer.android.com/reference/java/nio/file/FileVisitOption) - [FileVisitResult](https://developer.android.com/reference/java/nio/file/FileVisitResult) - [LinkOption](https://developer.android.com/reference/java/nio/file/LinkOption) - [StandardCopyOption](https://developer.android.com/reference/java/nio/file/StandardCopyOption) - [StandardOpenOption](https://developer.android.com/reference/java/nio/file/StandardOpenOption) - ## Exceptions - [AccessDeniedException](https://developer.android.com/reference/java/nio/file/AccessDeniedException) - [AtomicMoveNotSupportedException](https://developer.android.com/reference/java/nio/file/AtomicMoveNotSupportedException) - [ClosedDirectoryStreamException](https://developer.android.com/reference/java/nio/file/ClosedDirectoryStreamException) - [ClosedFileSystemException](https://developer.android.com/reference/java/nio/file/ClosedFileSystemException) - [ClosedWatchServiceException](https://developer.android.com/reference/java/nio/file/ClosedWatchServiceException) - [DirectoryIteratorException](https://developer.android.com/reference/java/nio/file/DirectoryIteratorException) - [DirectoryNotEmptyException](https://developer.android.com/reference/java/nio/file/DirectoryNotEmptyException) - [FileAlreadyExistsException](https://developer.android.com/reference/java/nio/file/FileAlreadyExistsException) - [FileSystemAlreadyExistsException](https://developer.android.com/reference/java/nio/file/FileSystemAlreadyExistsException) - [FileSystemException](https://developer.android.com/reference/java/nio/file/FileSystemException) - [FileSystemLoopException](https://developer.android.com/reference/java/nio/file/FileSystemLoopException) - [FileSystemNotFoundException](https://developer.android.com/reference/java/nio/file/FileSystemNotFoundException) - [InvalidPathException](https://developer.android.com/reference/java/nio/file/InvalidPathException) - [NoSuchFileException](https://developer.android.com/reference/java/nio/file/NoSuchFileException) - [NotDirectoryException](https://developer.android.com/reference/java/nio/file/NotDirectoryException) - [NotLinkException](https://developer.android.com/reference/java/nio/file/NotLinkException) - [ProviderMismatchException](https://developer.android.com/reference/java/nio/file/ProviderMismatchException) - [ProviderNotFoundException](https://developer.android.com/reference/java/nio/file/ProviderNotFoundException) - [ReadOnlyFileSystemException](https://developer.android.com/reference/java/nio/file/ReadOnlyFileSystemException)