Package org.apache.commons.io.filefilter
Class EmptyFileFilter
java.lang.Object
org.apache.commons.io.filefilter.AbstractFileFilter
org.apache.commons.io.filefilter.EmptyFileFilter
- All Implemented Interfaces:
FileFilter
,FilenameFilter
,Serializable
,IOFileFilter
This filter accepts files or directories that are empty.
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]); }
- Since:
- 1.3
- See Also:
-
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final IOFileFilter
Singleton instance of empty filterstatic final IOFileFilter
Singleton instance of not-empty filterFields inherited from interface org.apache.commons.io.filefilter.IOFileFilter
EMPTY_STRING_ARRAY
-
Constructor Summary
Constructors -
Method Summary
Methods inherited from class org.apache.commons.io.filefilter.AbstractFileFilter
accept, toString
-
Field Details
-
EMPTY
Singleton instance of empty filter -
NOT_EMPTY
Singleton instance of not-empty filter
-
-
Constructor Details
-
EmptyFileFilter
protected EmptyFileFilter()Restrictive constructor.
-
-
Method Details
-
accept
Checks to see if the file is empty.- Specified by:
accept
in interfaceFileFilter
- Specified by:
accept
in interfaceIOFileFilter
- Overrides:
accept
in classAbstractFileFilter
- Parameters:
file
- the file or directory to check- Returns:
true
if the file or directory is empty, otherwisefalse
.
-