java.io.FileFilter
, java.io.FilenameFilter
, java.io.Serializable
, IOFileFilter
public class EmptyFileFilter extends AbstractFileFilter implements java.io.Serializable
If the File
is a directory it checks that
it contains no files.
Example, showing how to print out a list of the current directory's empty files/directories:
File dir = new File("."); String[] files = dir.list( EmptyFileFilter.EMPTY ); for ( int i = 0; i < files.length; i++ ) { System.out.println(files[i]); }
Example, showing how to print out a list of the current directory's non-empty files/directories:
File dir = new File("."); String[] files = dir.list( EmptyFileFilter.NOT_EMPTY ); for ( int i = 0; i < files.length; i++ ) { System.out.println(files[i]); }
Modifier and Type | Field | Description |
---|---|---|
static IOFileFilter |
EMPTY |
Singleton instance of empty filter
|
static IOFileFilter |
NOT_EMPTY |
Singleton instance of not-empty filter
|
Modifier | Constructor | Description |
---|---|---|
protected |
EmptyFileFilter() |
Restrictive consructor.
|
Modifier and Type | Method | Description |
---|---|---|
boolean |
accept(java.io.File file) |
Checks to see if the file is empty.
|
accept, toString
public static final IOFileFilter EMPTY
public static final IOFileFilter NOT_EMPTY
public boolean accept(java.io.File file)
accept
in interface java.io.FileFilter
accept
in interface IOFileFilter
accept
in class AbstractFileFilter
file
- the file or directory to checktrue
if the file or directory
is empty, otherwise false
.Copyright (c) 2002-2017 Apache Software Foundation