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 = ...
       ((AbstractFileComparator) LastModifiedFileComparator.LASTMODIFIED_COMPARATOR).sort(list);
 
```
Example of doing a reverse sort of an array of files using the LASTMODIFIED_REVERSE singleton instance:
```
       File[] array = ...
       ((AbstractFileComparator) LastModifiedFileComparator.LASTMODIFIED_REVERSE).sort(array);
 
```
Since:

1.4

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`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.
`private static long`	`serialVersionUID`

Constructor Summary

Constructors
Constructor Description

LastModifiedFileComparator()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`compare(java.io.File file1, java.io.File file2)`	Compares 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, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

- Field Detail
  - serialVersionUID
```
private static final long serialVersionUID
```
    See Also:
    
    Constant Field Values
  - 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)
```
    Compares 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 last modified date/time is less than the second, zero if the last modified date/time are the same and a positive value if the first files last modified date/time is greater than the second file.