class:FileSystemView [NONE]

```
public abstract class FileSystemView
extends Object
```
FileSystemView is JFileChooser's gateway to the file system. Since the JDK1.1 File API doesn't allow access to such information as root partitions, file type information, or hidden file bits, this class is designed to intuit as much OS-specific file system information as possible.
Java Licensees may want to provide a different implementation of FileSystemView to better handle a given operating system.

constructor:<init>() [NONE]

FileSystemView
```
public FileSystemView()
```
Constructs a FileSystemView.

method:getFileSystemView() [NONE]

getFileSystemView
```
public static FileSystemView getFileSystemView()
```
Returns the file system view.

Returns:

the file system view

method:isRoot(java.io.File) [NONE]

isRoot
```
public boolean isRoot(File f)
```
Determines if the given file is a root in the navigable tree(s). Examples: Windows 98 has one root, the Desktop folder. DOS has one root per drive letter, C:\, D:\, etc. Unix has one root, the "/" directory. The default implementation gets information from the ShellFolder class.

Parameters:

f - a File object representing a directory

Returns:

true if f is a root in the navigable tree.

See Also:

isFileSystemRoot(java.io.File)

method:isTraversable(java.io.File) [NONE]

isTraversable
```
public Boolean isTraversable(File f)
```
Returns true if the file (directory) can be visited. Returns false if the directory cannot be traversed.

Parameters:

f - the File

Returns:

true if the file/directory can be traversed, otherwise false

Since:

1.4

See Also:

JFileChooser.isTraversable(java.io.File), FileView.isTraversable(java.io.File)

method:getSystemDisplayName(java.io.File) [NONE]

getSystemDisplayName
```
public String getSystemDisplayName(File f)
```
Name of a file, directory, or folder as it would be displayed in a system file browser. Example from Windows: the "M:\" directory displays as "CD-ROM (M:)" The default implementation gets information from the ShellFolder class.

Parameters:

f - a File object

Returns:

the file name as it would be displayed by a native file chooser

Since:

1.4

See Also:

JFileChooser.getName(java.io.File)

method:getSystemTypeDescription(java.io.File) [NONE]

getSystemTypeDescription
```
public String getSystemTypeDescription(File f)
```
Type description for a file, directory, or folder as it would be displayed in a system file browser. Example from Windows: the "Desktop" folder is described as "Desktop". Override for platforms with native ShellFolder implementations.

Parameters:

f - a File object

Returns:

the file type description as it would be displayed by a native file chooser or null if no native information is available.

Since:

1.4

See Also:

JFileChooser.getTypeDescription(java.io.File)

method:getSystemIcon(java.io.File) [NONE]

getSystemIcon
```
public Icon getSystemIcon(File f)
```
Icon for a file, directory, or folder as it would be displayed in a system file browser. Example from Windows: the "M:\" directory displays a CD-ROM icon. The default implementation gets information from the ShellFolder class.

Parameters:

f - a File object

Returns:

an icon as it would be displayed by a native file chooser

Since:

1.4

See Also:

JFileChooser.getIcon(java.io.File)

method:isParent(java.io.File,java.io.File) [NONE]

isParent
```
public boolean isParent(File folder,
                        File file)
```
On Windows, a file can appear in multiple folders, other than its parent directory in the filesystem. Folder could for example be the "Desktop" folder which is not the same as file.getParentFile().

Parameters:

folder - a File object representing a directory or special folder

file - a File object

Returns:

true if folder is a directory or special folder and contains file.

Since:

1.4

method:getChild(java.io.File,java.lang.String) [NONE]

getChild
```
public File getChild(File parent,
                     String fileName)
```
Parameters:

parent - a File object representing a directory or special folder

fileName - a name of a file or folder which exists in parent

Returns:

a File object. This is normally constructed with new File(parent, fileName) except when parent and child are both special folders, in which case the File is a wrapper containing a ShellFolder object.

Since:

1.4

method:isFileSystem(java.io.File) [NONE]

isFileSystem
```
public boolean isFileSystem(File f)
```
Checks if f represents a real directory or file as opposed to a special folder such as "Desktop". Used by UI classes to decide if a folder is selectable when doing directory choosing.

Parameters:

f - a File object

Returns:

true if f is a real file or directory.

Since:

1.4

method:createNewFolder(java.io.File) [NONE]

createNewFolder
```
public abstract File createNewFolder(File containingDir)
                              throws IOException
```
Creates a new folder with a default folder name.

Parameters:

containingDir - a File object denoting directory to contain the new folder

Returns:

a File object denoting the newly created folder

Throws:

IOException - if new folder could not be created

method:isHiddenFile(java.io.File) [NONE]

isHiddenFile
```
public boolean isHiddenFile(File f)
```
Returns whether a file is hidden or not.

Parameters:

f - a File object

Returns:

true if the given File denotes a hidden file

method:isFileSystemRoot(java.io.File) [NONE]

isFileSystemRoot
```
public boolean isFileSystemRoot(File dir)
```
Is dir the root of a tree in the file system, such as a drive or partition. Example: Returns true for "C:\" on Windows 98.

Parameters:

dir - a File object representing a directory

Returns:

true if f is a root of a filesystem

Since:

1.4

See Also:

isRoot(java.io.File)

method:isDrive(java.io.File) [NONE]

isDrive
```
public boolean isDrive(File dir)
```
Used by UI classes to decide whether to display a special icon for drives or partitions, e.g. a "hard disk" icon. The default implementation has no way of knowing, so always returns false.

Parameters:

dir - a directory

Returns:

false always

Since:

1.4

method:isFloppyDrive(java.io.File) [NONE]

isFloppyDrive
```
public boolean isFloppyDrive(File dir)
```
Used by UI classes to decide whether to display a special icon for a floppy disk. Implies isDrive(dir). The default implementation has no way of knowing, so always returns false.

Parameters:

dir - a directory

Returns:

false always

Since:

1.4

method:isComputerNode(java.io.File) [NONE]

isComputerNode
```
public boolean isComputerNode(File dir)
```
Used by UI classes to decide whether to display a special icon for a computer node, e.g. "My Computer" or a network server. The default implementation has no way of knowing, so always returns false.

Parameters:

dir - a directory

Returns:

false always

Since:

1.4

method:getRoots() [NONE]

getRoots
```
public File[] getRoots()
```
Returns all root partitions on this system. For example, on Windows, this would be the "Desktop" folder, while on DOS this would be the A: through Z: drives.

Returns:

an array of File objects representing all root partitions on this system

method:getHomeDirectory() [NONE]

getHomeDirectory
```
public File getHomeDirectory()
```
Returns the home directory.

Returns:

the home directory

method:getDefaultDirectory() [NONE]

getDefaultDirectory
```
public File getDefaultDirectory()
```
Return the user's default starting directory for the file chooser.

Returns:

a File object representing the default starting folder

Since:

1.4

method:createFileObject(java.io.File,java.lang.String) [NONE]

createFileObject
```
public File createFileObject(File dir,
                             String filename)
```
Returns a File object constructed in dir from the given filename.

Parameters:

dir - an abstract pathname denoting a directory

filename - a String representation of a pathname

Returns:

a File object created from dir and filename

method:createFileObject(java.lang.String) [NONE]

createFileObject
```
public File createFileObject(String path)
```
Returns a File object constructed from the given path string.

Parameters:

path - String representation of path

Returns:

a File object created from the given path

method:getFiles(java.io.File,boolean) [NONE]

getFiles
```
public File[] getFiles(File dir,
                       boolean useFileHiding)
```
Gets the list of shown (i.e. not hidden) files.

Parameters:

dir - the root directory of files to be returned

useFileHiding - determine if hidden files are returned

Returns:

an array of File objects representing files and directories in the given dir. It includes hidden files if useFileHiding is false.

method:getParentDirectory(java.io.File) [NONE]

getParentDirectory
```
public File getParentDirectory(File dir)
```
Returns the parent directory of dir.

Parameters:

dir - the File being queried

Returns:

the parent directory of dir, or null if dir is null

method:getChooserComboBoxFiles() [CHANGED]

getChooserComboBoxFiles public File[] getChooserComboBoxFiles() Returns an array of files representing the values to show by defaultwhich will be shown in the file chooser selector. Returns: an array of `File` objects. Throws: `SecurityException` -The array returned may be possibly empty if the caller does not have necessarythere are no appropriate permissions. Since: 9
getChooserComboBoxFiles public File[] getChooserComboBoxFiles() Returns an array of files representing the values to show by default in the file chooser selector. Returns: an array of `File` objects. Throws: `SecurityException` - if the caller does not have necessary permissions Since: 9	getChooserComboBoxFiles public File[] getChooserComboBoxFiles() Returns an array of files representing the values which will be shown in the file chooser selector. Returns: an array of `File` objects. The array returned may be possibly empty if there are no appropriate permissions. Since: 9

method:getChooserShortcutPanelFiles() [ADDED]

getChooserShortcutPanelFiles
```
public final File[] getChooserShortcutPanelFiles()
```
Returns an array of files representing the values to show by default in the file chooser shortcuts panel.

Returns:

an array of File objects. The array returned may be possibly empty if there are no appropriate permissions.

Since:

12

method:isLink(java.io.File) [NONE]

isLink
```
public boolean isLink(File file)
```
Returns whether the specified file denotes a shell interpreted link which can be obtained by the getLinkLocation(File).

Parameters:

file - a file

Returns:

whether this is a link

Throws:

NullPointerException - if file equals null

SecurityException - if the caller does not have necessary permissions

Since:

9

See Also:

getLinkLocation(File)

method:getLinkLocation(java.io.File) [NONE]

getLinkLocation
```
public File getLinkLocation(File file)
                     throws FileNotFoundException
```
Returns the regular file referenced by the specified link file if the specified file is a shell interpreted link. Returns null if the specified file is not a shell interpreted link.

Parameters:

file - a file

Returns:

the linked file or null.

Throws:

FileNotFoundException - if the linked file does not exist

NullPointerException - if file equals null

SecurityException - if the caller does not have necessary permissions

Since:

9

method:createFileSystemRoot(java.io.File) [NONE]

createFileSystemRoot
```
protected File createFileSystemRoot(File f)
```
Creates a new File object for f with correct behavior for a file system root directory.

Parameters:

f - a File object representing a file system root directory, for example "/" on Unix or "C:\" on Windows.

Returns:

a new File object

Since:

1.4