org.apache.commons.io.comparator
Class LastModifiedFileComparator

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

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator<java.io.File>

public class LastModifiedFileComparator
extends AbstractFileComparator
implements java.io.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 = ...
       LastModifiedFileComparator.LASTMODIFIED_COMPARATOR.sort(list);
 

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

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

Since:

1.4

Version:

$Id: LastModifiedFileComparator.java 1304052 2012-03-22 20:55:29Z ggregory $

See Also:

Serialized Form

Field Summary

static java.util.Comparator<java.io.File>	LASTMODIFIED_COMPARATOR Last modified comparator instance
static java.util.Comparator<java.io.File>	LASTMODIFIED_REVERSE Reverse last modified comparator instance

Constructor Summary

LastModifiedFileComparator()

Method Summary

int	compare(java.io.File file1, java.io.File file2) Compare the last the last modified date/time of two files.

Methods inherited from class org.apache.commons.io.comparator.AbstractFileComparator

sort, sort, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Comparator

equals

Field Detail

LASTMODIFIED_COMPARATOR

public static final java.util.Comparator<java.io.File> LASTMODIFIED_COMPARATOR

Last modified comparator instance

LASTMODIFIED_REVERSE

public static final java.util.Comparator<java.io.File> LASTMODIFIED_REVERSE

Reverse last modified comparator instance

Constructor Detail

LastModifiedFileComparator

public LastModifiedFileComparator()

Method Detail

compare

public int compare(java.io.File file1,
                   java.io.File file2)

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

Specified by:

compare in interface java.util.Comparator<java.io.File>

Parameters:

file1 - The first file to compare

file2 - 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.