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Comparator implementations
for Files.
See:
Description
| Class Summary | |
|---|---|
| CompositeFileComparator | Compare two files using a set of delegate file Comparator. |
| DefaultFileComparator | Compare two files using the default File.compareTo(File) method. |
| DirectoryFileComparator | Compare two files using the File.isDirectory() method. |
| ExtensionFileComparator | Compare the file name extensions for order
(see FilenameUtils.getExtension(String)). |
| LastModifiedFileComparator | Compare the last modified date/time of two files for order
(see File.lastModified()). |
| NameFileComparator | Compare the names of two files for order (see File.getName()). |
| PathFileComparator | Compare the path of two files for order (see File.getPath()). |
| SizeFileComparator | Compare the length/size of two files for order (see
File.length() and FileUtils.sizeOfDirectory(File)). |
This package provides various Comparator implementations
for Files.
All the compartors include convenience utility sort(File...) and
sort(List) methods.
For example, to sort the files in a directory by name:
File[] files = dir.listFiles();
NameFileComparator.NAME_COMPARATOR.sort(files);
...alternatively you can do this in one line:
File[] files = NameFileComparator.NAME_COMPARATOR.sort(dir.listFiles());
The CompositeFileComparator can be used to compare (and sort lists or arrays of files) by combining a number other comparators.
For example, to sort an array of files by type (i.e. directory or file) and then by name:
CompositeFileComparator comparator =
new CompositeFileComparator(
DirectoryFileComparator.DIRECTORY_COMPARATOR,
NameFileComparator.NAME_COMPARATOR);
File[] files = dir.listFiles();
comparator.sort(files);
The Comparator implementations have some convenience
singleton(thread-safe) instances ready to use:
File.compareTo(File) method.
File.compareTo(File) method.
File.isDirectory() method (directories < files).
File.isDirectory() method (directories > files).
FilenameUtils.getExtension(String) method.
FilenameUtils.getExtension(String) method.
FilenameUtils.getExtension(String) method.
FilenameUtils.getExtension(String) method.
FilenameUtils.getExtension(String) method.
FilenameUtils.getExtension(String) method.
File.lastModified() method.
File.lastModified() method.
File.getName() method.
File.getName() method.
File.getName() method.
File.getName() method.
File.getName() method.
File.getName() method.
File.getPath() method.
File.getPath() method.
File.getPath() method.
File.getPath() method.
File.getPath() method.
File.getPath() method.
File.length() method (directories treated as zero length).
File.length() method (directories treated as zero length).
FileUtils.sizeOfDirectory(File) method
(sums the size of a directory's contents).
FileUtils.sizeOfDirectory(File) method
(sums the size of a directory's contents).
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