JavaSE - NIO —— File与NIO File功能对应

java.io.File Functionality

java.nio.file Functionality

Tutorial Coverage

java.io.File

java.nio.file.Path

The Path Class

java.io.RandomAccessFile

The SeekableByteChannel functionality.

Random Access Files

File.canRead, canWrite, canExecute

Files.isReadable, Files.isWritable, and Files.isExecutable.

On UNIX file systems, theManaging Metadata (File and File Store Attributes) package is used to check the nine file permissions.

Checking a File or Directory

Managing Metadata

File.isDirectory(), File.isFile(), and File.length()

Files.isDirectory(Path, LinkOption...), Files.isRegularFile(Path, LinkOption...), and Files.size(Path)

Managing Metadata

File.lastModified() and File.setLastModified(long)

Files.getLastModifiedTime(Path, LinkOption...) and Files.setLastMOdifiedTime(Path, FileTime)

Managing Metadata

The File methods that set various attributes: setExecutable, setReadable, setReadOnly, setWritable

These methods are replaced by the Files method setAttribute(Path, String, Object, LinkOption...).

Managing Metadata

new File(parent, "newfile")

parent.resolve("newfile")

Path Operations

File.renameTo

Files.move

Moving a File or Directory

File.delete

Files.delete

Deleting a File or Directory

File.createNewFile

Files.createFile

Creating Files

File.deleteOnExit

Replaced by the DELETE_ON_CLOSE option specified in the createFile method.

Creating Files

File.createTempFile

Files.createTempFile(Path, String, FileAttributes<?>), Files.createTempFile(Path, String, String, FileAttributes<?>)

Creating Files

Creating and Writing a File by Using Stream I/O

Reading and Writing Files by Using Channel I/O

File.exists

Files.exists and Files.notExists

Verifying the Existence of a File or Directory

File.compareTo and equals

Path.compareTo and equals

Comparing Two Paths

File.getAbsolutePath and getAbsoluteFile

Path.toAbsolutePath

Converting a Path

File.getCanonicalPath and getCanonicalFile

Path.toRealPath or normalize

Converting a Path (toRealPath)

Removing Redundancies From a Path (normalize)

File.toURI

Path.toURI

Converting a Path

File.isHidden

Files.isHidden

Retrieving Information About the Path

File.list and listFiles

Path.newDirectoryStream

Listing a Directory's Contents

File.mkdir and mkdirs

Path.createDirectory

Creating a Directory

File.listRoots

FileSystem.getRootDirectories

Listing a File System's Root Directories

File.getTotalSpace, File.getFreeSpace, File.getUsableSpace

FileStore.getTotalSpace, FileStore.getUnallocatedSpace, FileStore.getUsableSpace, FileStore.getTotalSpace

File Store Attributes