Package org.apache.commons.io.filefilter
Class DirectoryFileFilter
java.lang.Object
org.apache.commons.io.filefilter.AbstractFileFilter
org.apache.commons.io.filefilter.DirectoryFileFilter
- All Implemented Interfaces:
- FileFilter,- FilenameFilter,- Serializable,- FileVisitor<Path>,- PathMatcher,- PathFilter,- PathVisitor,- IOFileFilter
This filter accepts 
Files that are directories.
 For example, here is how to print out a list of the current directory's subdirectories:
Using Classic IO
 File dir = FileUtils.current();
 String[] files = dir.list(DirectoryFileFilter.INSTANCE);
 for (String file : files) {
     System.out.println(file);
 }
 
 Using NIO
final Path dir = PathUtils.current(); final AccumulatorPathVisitor visitor = AccumulatorPathVisitor.withLongCounters(DirectoryFileFilter.INSTANCE); // // Walk one directory Files.walkFileTree(dir, Collections.emptySet(), 1, visitor); System.out.println(visitor.getPathCounters()); System.out.println(visitor.getFileList()); // visitor.getPathCounters().reset(); // // Walk directory tree Files.walkFileTree(dir, visitor); System.out.println(visitor.getPathCounters()); System.out.println(visitor.getDirList()); System.out.println(visitor.getFileList());
Deprecating Serialization
Serialization is deprecated and will be removed in 3.0.
- Since:
- 1.0
- See Also:
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Field SummaryFieldsModifier and TypeFieldDescriptionstatic final IOFileFilterSingleton instance of directory filter.static final IOFileFilterSingleton instance of directory filter.Fields inherited from interface org.apache.commons.io.filefilter.IOFileFilterEMPTY_STRING_ARRAY
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionbooleanTests to see if the file is a directory.accept(Path file, BasicFileAttributes attributes) Tests to see if the file is a directory.Methods inherited from class org.apache.commons.io.filefilter.AbstractFileFilteraccept, handle, postVisitDirectory, preVisitDirectory, toString, visitFile, visitFileFailedMethods inherited from class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitMethods inherited from interface org.apache.commons.io.filefilter.IOFileFilterand, matches, negate, or
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Field Details- 
DIRECTORYSingleton instance of directory filter.- Since:
- 1.3
 
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INSTANCESingleton 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.
 
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Constructor Details- 
DirectoryFileFilterprotected DirectoryFileFilter()Restrictive constructor.
 
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Method Details- 
acceptTests to see if the file is a directory.- Specified by:
- acceptin interface- FileFilter
- Specified by:
- acceptin interface- IOFileFilter
- Overrides:
- acceptin class- AbstractFileFilter
- Parameters:
- file- the File to check
- Returns:
- true if the file is a directory
 
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acceptTests to see if the file is a directory.- Specified by:
- acceptin interface- IOFileFilter
- Specified by:
- acceptin interface- PathFilter
- Parameters:
- file- the File to check
- attributes- the path's basic attributes (may be null).
- Returns:
- true if the file is a directory
- Since:
- 2.9.0
 
 
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