org.apache.commons.io.filefilter
Class DirectoryFileFilter

java.lang.Object
  org.apache.commons.io.filefilter.AbstractFileFilter
      org.apache.commons.io.filefilter.DirectoryFileFilter

All Implemented Interfaces:

FileFilter, FilenameFilter, Serializable, IOFileFilter

public class DirectoryFileFilter
extends AbstractFileFilter
implements Serializable

This filter accepts Files that are directories.

For example, here is how to print out a list of the current directory's subdirectories:

 File dir = new File(".");
 String[] files = dir.list( DirectoryFileFilter.INSTANCE );
 for ( int i = 0; i < files.length; i++ ) {
     System.out.println(files[i]);
 }
 

Since:

Commons IO 1.0

Version:

$Revision: 587916 $ $Date: 2007-10-24 16:53:07 +0100 (Wed, 24 Oct 2007) $

Author:

Stephen Colebourne, Peter Donald

See Also:

Serialized Form

Field Summary

static IOFileFilter	DIRECTORY Singleton instance of directory filter.
static IOFileFilter	INSTANCE Singleton instance of directory filter.

Constructor Summary

protected

DirectoryFileFilter() Restrictive consructor.

Method Summary

boolean

accept(File file) Checks to see if the file is a directory.

Methods inherited from class org.apache.commons.io.filefilter.AbstractFileFilter

accept, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DIRECTORY

public static final IOFileFilter DIRECTORY

Singleton instance of directory filter.

Since:

Commons IO 1.3

INSTANCE

public static final IOFileFilter INSTANCE

Singleton instance of directory filter. Please use the identical DirectoryFileFilter.DIRECTORY constant. The new name is more JDK 1.5 friendly as it doesn't clash with other values when using static imports.

Constructor Detail

DirectoryFileFilter

protected DirectoryFileFilter()

Restrictive consructor.

Method Detail

accept

public boolean accept(File file)

Checks to see if the file is a directory.

Specified by:

accept in interface FileFilter

Specified by:

accept in interface IOFileFilter

Overrides:

accept in class AbstractFileFilter

Parameters:

file - the File to check

Returns:

true if the file is a directory