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java.lang.Object org.apache.commons.io.comparator.SizeFileComparator
public class SizeFileComparator
Compare the length/size of two files for order (see
File.length()
and FileUtils.sizeOfDirectory(File)
).
This comparator can be used to sort lists or arrays of files by their length/size.
Example of sorting a list of files using the
SIZE_COMPARATOR
singleton instance:
List<File> list = ... Collections.sort(list, LengthFileComparator.LENGTH_COMPARATOR);
Example of doing a reverse sort of an array of files using the
SIZE_REVERSE
singleton instance:
File[] array = ... Arrays.sort(array, LengthFileComparator.LENGTH_REVERSE);
N.B. Directories are treated as zero size unless
sumDirectoryContents
is true
.
Field Summary | |
---|---|
static Comparator |
SIZE_COMPARATOR
Size comparator instance - directories are treated as zero size |
static Comparator |
SIZE_REVERSE
Reverse size comparator instance - directories are treated as zero size |
static Comparator |
SIZE_SUMDIR_COMPARATOR
Size comparator instance which sums the size of a directory's contents using FileUtils.sizeOfDirectory(File) |
static Comparator |
SIZE_SUMDIR_REVERSE
Reverse size comparator instance which sums the size of a directory's contents using FileUtils.sizeOfDirectory(File) |
Constructor Summary | |
---|---|
SizeFileComparator()
Construct a file size comparator instance (directories treated as zero size). |
|
SizeFileComparator(boolean sumDirectoryContents)
Construct a file size comparator instance specifying whether the size of the directory contents should be aggregated. |
Method Summary | |
---|---|
int |
compare(Object obj1,
Object obj2)
Compare the length of two files. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface java.util.Comparator |
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equals |
Field Detail |
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public static final Comparator SIZE_COMPARATOR
public static final Comparator SIZE_REVERSE
public static final Comparator SIZE_SUMDIR_COMPARATOR
FileUtils.sizeOfDirectory(File)
public static final Comparator SIZE_SUMDIR_REVERSE
FileUtils.sizeOfDirectory(File)
Constructor Detail |
---|
public SizeFileComparator()
public SizeFileComparator(boolean sumDirectoryContents)
If the sumDirectoryContents
is true
The size of
directories is calculated using FileUtils.sizeOfDirectory(File)
.
sumDirectoryContents
- true
if the sum of the directoryies contents
should be calculated, otherwise false
if directories should be treated
as size zero (see FileUtils.sizeOfDirectory(File)
).Method Detail |
---|
public int compare(Object obj1, Object obj2)
compare
in interface Comparator
obj1
- The first file to compareobj2
- The second file to compare
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