public class DirectoryFileComparator extends AbstractFileComparator implements java.io.Serializable
File.isDirectory() method.
This comparator can be used to sort lists or arrays by directories and files.
Example of sorting a list of files/directories using the
DIRECTORY_COMPARATOR singleton instance:
List<File> list = ...
((AbstractFileComparator) DirectoryFileComparator.DIRECTORY_COMPARATOR).sort(list);
Example of doing a reverse sort of an array of files/directories using the
DIRECTORY_REVERSE singleton instance:
File[] array = ...
((AbstractFileComparator) DirectoryFileComparator.DIRECTORY_REVERSE).sort(array);
| Modifier and Type | Field and Description |
|---|---|
static java.util.Comparator<java.io.File> |
DIRECTORY_COMPARATOR
Singleton default comparator instance
|
static java.util.Comparator<java.io.File> |
DIRECTORY_REVERSE
Singleton reverse default comparator instance
|
private static long |
serialVersionUID |
| Constructor and Description |
|---|
DirectoryFileComparator() |
| Modifier and Type | Method and Description |
|---|---|
int |
compare(java.io.File file1,
java.io.File file2)
Compare the two files using the
File.isDirectory() method. |
private int |
getType(java.io.File file)
Convert type to numeric value.
|
sort, sort, toStringprivate static final long serialVersionUID
public static final java.util.Comparator<java.io.File> DIRECTORY_COMPARATOR
public static final java.util.Comparator<java.io.File> DIRECTORY_REVERSE
public int compare(java.io.File file1,
java.io.File file2)
File.isDirectory() method.compare in interface java.util.Comparator<java.io.File>file1 - The first file to comparefile2 - The second file to compareFile.compareTo(File) with file2 as the parameter.private int getType(java.io.File file)
file - The fileCopyright (c) 2002-2016 Apache Software Foundation