public interface BasicFileAttributes
Basic file attributes are attributes that are common to many file systems and consist of mandatory and optional file attributes as defined by this interface.
Usage Example:
Path file = ...
BasicFileAttributes attrs = Files.readAttributes(file, BasicFileAttributes.class);
BasicFileAttributeView| Modifier and Type | Method and Description |
|---|---|
FileTime |
creationTime()
Returns the creation time.
|
Object |
fileKey()
Returns an object that uniquely identifies the given file, or
null if a file key is not available. |
boolean |
isDirectory()
Tells whether the file is a directory.
|
boolean |
isOther()
Tells whether the file is something other than a regular file, directory,
or symbolic link.
|
boolean |
isRegularFile()
Tells whether the file is a regular file with opaque content.
|
boolean |
isSymbolicLink()
Tells whether the file is a symbolic link.
|
FileTime |
lastAccessTime()
Returns the time of last access.
|
FileTime |
lastModifiedTime()
Returns the time of last modification.
|
long |
size()
Returns the size of the file (in bytes).
|
FileTime lastModifiedTime()
If the file system implementation does not support a time stamp
to indicate the time of last modification then this method returns an
implementation specific default value, typically a FileTime
representing the epoch (1970-01-01T00:00:00Z).
FileTime representing the time the file was last
modifiedFileTime lastAccessTime()
If the file system implementation does not support a time stamp
to indicate the time of last access then this method returns
an implementation specific default value, typically the last-modified-time or a FileTime
representing the epoch (1970-01-01T00:00:00Z).
FileTime representing the time of last accessFileTime creationTime()
If the file system implementation does not support a time stamp
to indicate the time when the file was created then this method returns
an implementation specific default value, typically the last-modified-time or a FileTime
representing the epoch (1970-01-01T00:00:00Z).
FileTime representing the time the file was createdboolean isRegularFile()
true if the file is a regular file with opaque contentboolean isDirectory()
true if the file is a directoryboolean isSymbolicLink()
true if the file is a symbolic linkboolean isOther()
true if the file something other than a regular file,
directory or symbolic linklong size()
regular files is implementation specific and
therefore unspecified.Object fileKey()
null if a file key is not available. On some platforms or file systems
it is possible to use an identifier, or a combination of identifiers to
uniquely identify a file. Such identifiers are important for operations
such as file tree traversal in file systems that support symbolic links or file systems
that allow a file to be an entry in more than one directory. On UNIX file
systems, for example, the device ID and inode are
commonly used for such purposes.
The file key returned by this method can only be guaranteed to be unique if the file system and files remain static. Whether a file system re-uses identifiers after a file is deleted is implementation dependent and therefore unspecified.
File keys returned by this method can be compared for equality and are
suitable for use in collections. If the file system and files remain static,
and two files are the same with
non-null file keys, then their file keys are equal.
nullFiles.walkFileTree(java.nio.file.Path, java.util.Set<java.nio.file.FileVisitOption>, int, java.nio.file.FileVisitor<? super java.nio.file.Path>) Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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