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 and Description |
|---|---|
static IOFileFilter |
EMPTY
Singleton instance of empty filter
|
static IOFileFilter |
NOT_EMPTY
Singleton instance of not-empty filter
|
private static long |
serialVersionUID |
| Modifier | Constructor and Description |
|---|---|
protected |
EmptyFileFilter()
Restrictive consructor.
|
| Modifier and Type | Method and Description |
|---|---|
boolean |
accept(java.io.File file)
Checks to see if the file is empty.
|
accept, toStringprivate static final long serialVersionUID
public static final IOFileFilter EMPTY
public static final IOFileFilter NOT_EMPTY
public boolean accept(java.io.File file)
accept in interface java.io.FileFilteraccept in interface IOFileFilteraccept in class AbstractFileFilterfile - the file or directory to checktrue if the file or directory
is empty, otherwise false.Copyright (c) 2002-2016 Apache Software Foundation