org.apache.commons.io.filefilter

类 DirectoryFileFilter

java.lang.Object

org.apache.commons.io.filefilter.AbstractFileFilter

org.apache.commons.io.filefilter.DirectoryFileFilter

所有已实现的接口:

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]);
 }
 

从以下版本开始:

1.0

另请参阅:

FileFilterUtils.directoryFileFilter(), 序列化表格

字段概要

字段

限定符和类型	字段和说明
static IOFileFilter	DIRECTORY Singleton instance of directory filter.
static IOFileFilter	INSTANCE Singleton instance of directory filter.

构造器概要

构造器

限定符	构造器和说明
protected	DirectoryFileFilter() Restrictive consructor.

方法概要

限定符和类型	方法和说明
boolean	accept(File file) Checks to see if the file is a directory.

从类继承的方法 org.apache.commons.io.filefilter.AbstractFileFilter

accept, toString

从类继承的方法 java.lang.Object

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

字段详细资料

DIRECTORY

public static final IOFileFilter DIRECTORY

Singleton instance of directory filter.

从以下版本开始:

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.

构造器详细资料

DirectoryFileFilter

protected DirectoryFileFilter()

Restrictive consructor.

方法详细资料

accept

public boolean accept(File file)

Checks to see if the file is a directory.

指定者:

accept 在接口中 FileFilter

指定者:

accept 在接口中 IOFileFilter

覆盖:

accept 在类中 AbstractFileFilter

参数:

file - the File to check

返回:

true if the file is a directory