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java.lang.Objectorg.apache.commons.io.comparator.AbstractFileComparator
org.apache.commons.io.comparator.DirectoryFileComparator
public class DirectoryFileComparator
Compare two files using the 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 = ... 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 = ... DirectoryFileComparator.DIRECTORY_REVERSE.sort(array);
Field Summary | |
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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 |
Constructor Summary | |
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DirectoryFileComparator()
|
Method Summary | |
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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. |
Methods inherited from class org.apache.commons.io.comparator.AbstractFileComparator |
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sort, sort, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface java.util.Comparator |
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equals |
Field Detail |
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public static final java.util.Comparator<java.io.File> DIRECTORY_COMPARATOR
public static final java.util.Comparator<java.io.File> DIRECTORY_REVERSE
Constructor Detail |
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public DirectoryFileComparator()
Method Detail |
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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 compare
File.compareTo(File)
with file2 as the parameter.private int getType(java.io.File file)
file
- The file
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