org.apache.commons.io.comparator
Class LastModifiedFileComparator

java.lang.Object
  org.apache.commons.io.comparator.LastModifiedFileComparator

All Implemented Interfaces:

Serializable, Comparator

public class LastModifiedFileComparator
extends Object
implements Comparator, Serializable

Compare the last modified date/time of two files for order (see File.lastModified()).

This comparator can be used to sort lists or arrays of files by their last modified date/time.

Example of sorting a list of files using the LASTMODIFIED_COMPARATOR singleton instance:

       List<File> list = ...
       Collections.sort(list, LastModifiedFileComparator.LASTMODIFIED_COMPARATOR);
 

Example of doing a reverse sort of an array of files using the LASTMODIFIED_REVERSE singleton instance:

       File[] array = ...
       Arrays.sort(array, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
 

Since:

Commons IO 1.4

Version:

$Revision: 609243 $ $Date: 2008-01-06 00:30:42 +0000 (Sun, 06 Jan 2008) $

See Also:

Serialized Form

Field Summary

static Comparator	LASTMODIFIED_COMPARATOR Last modified comparator instance
static Comparator	LASTMODIFIED_REVERSE Reverse last modified comparator instance

Constructor Summary

LastModifiedFileComparator()

Method Summary

int	compare(Object obj1, Object obj2) Compare the last the last modified date/time 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

equals

Field Detail

LASTMODIFIED_COMPARATOR

public static final Comparator LASTMODIFIED_COMPARATOR

Last modified comparator instance

LASTMODIFIED_REVERSE

public static final Comparator LASTMODIFIED_REVERSE

Reverse last modified comparator instance

Constructor Detail

LastModifiedFileComparator

public LastModifiedFileComparator()

Method Detail

compare

public int compare(Object obj1,
                   Object obj2)

Compare the last the last modified date/time of two files.

Specified by:

compare in interface Comparator

Parameters:

obj1 - The first file to compare

obj2 - The second file to compare

Returns:

a negative value if the first file's lastmodified date/time is less than the second, zero if the lastmodified date/time are the same and a positive value if the first files lastmodified date/time is greater than the second file.