public class EmptyFileFilter extends AbstractFileFilter implements 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]);
}
| 限定符和类型 | 字段和说明 |
|---|---|
static IOFileFilter |
EMPTY
Singleton instance of empty filter
|
static IOFileFilter |
NOT_EMPTY
Singleton instance of not-empty filter
|
| 限定符 | 构造器和说明 |
|---|---|
protected |
EmptyFileFilter()
Restrictive consructor.
|
public static final IOFileFilter EMPTY
public static final IOFileFilter NOT_EMPTY
public boolean accept(File file)
accept 在接口中 FileFilteraccept 在接口中 IOFileFilteraccept 在类中 AbstractFileFilterfile - the file or directory to checktrue if the file or directory
is empty, otherwise false.