com.knowgate.io.filefilter

Class DirectoryFileFilter

java.lang.Object

com.knowgate.io.filefilter.AbstractFileFilter

com.knowgate.io.filefilter.DirectoryFileFilter

All Implemented Interfaces:

IOFileFilter, FileFilter, FilenameFilter, Serializable

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:

1.0

Version:

$Id: DirectoryFileFilter.java 1642757 2014-12-01 21:09:30Z sebb $

See Also:

FileFilterUtils.directoryFileFilter(), Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static IOFileFilter	DIRECTORY Singleton instance of directory filter.
static IOFileFilter	INSTANCE Singleton instance of directory filter.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DirectoryFileFilter() Restrictive consructor.

Method Summary

Modifier and Type	Method and Description
boolean	accept(File file) Checks to see if the file is a directory.

Methods inherited from class com.knowgate.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:

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 IOFileFilter

Specified by:

accept in interface FileFilter

Overrides:

accept in class AbstractFileFilter

Parameters:

file - the File to check

Returns:

true if the file is a directory