org.apache.commons.io.comparator

类 DefaultFileComparator

java.lang.Object

org.apache.commons.io.comparator.DefaultFileComparator

所有已实现的接口:

Serializable, Comparator<File>

public class DefaultFileComparator
extends Object
implements Serializable

Compare two files using the default File.compareTo(File) method.

This comparator can be used to sort lists or arrays of files by using the default file comparison.

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

       List<File> list = ...
       ((AbstractFileComparator) DefaultFileComparator.DEFAULT_COMPARATOR).sort(list);
 

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

       File[] array = ...
       ((AbstractFileComparator) DefaultFileComparator.DEFAULT_REVERSE).sort(array);
 

从以下版本开始:

1.4

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static Comparator<File>	DEFAULT_COMPARATOR Singleton default comparator instance
static Comparator<File>	DEFAULT_REVERSE Singleton reverse default comparator instance

构造器概要

构造器

构造器和说明
DefaultFileComparator()

方法概要

限定符和类型	方法和说明
int	compare(File file1, File file2) Compare the two files using the File.compareTo(File) method.
File[]	sort(File... files) Sort an array of files.
List<File>	sort(List<File> files) Sort a List of files.
String	toString() String representation of this file comparator.

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

字段详细资料

DEFAULT_COMPARATOR

public static final Comparator<File> DEFAULT_COMPARATOR

Singleton default comparator instance

DEFAULT_REVERSE

public static final Comparator<File> DEFAULT_REVERSE

Singleton reverse default comparator instance

构造器详细资料

DefaultFileComparator

public DefaultFileComparator()

方法详细资料

compare

public int compare(File file1,
                   File file2)

Compare the two files using the File.compareTo(File) method.

指定者:

compare 在接口中 Comparator<File>

参数:

file1 - The first file to compare

file2 - The second file to compare

返回:

the result of calling file1's File.compareTo(File) with file2 as the parameter.

sort

public File[] sort(File... files)

Sort an array of files.

This method uses Arrays.sort(Object[], Comparator) and returns the original array.

参数:

files - The files to sort, may be null

返回:

The sorted array

从以下版本开始:

2.0

sort

public List<File> sort(List<File> files)

Sort a List of files.

This method uses Collections.sort(List, Comparator) and returns the original list.

参数:

files - The files to sort, may be null

返回:

The sorted list

从以下版本开始:

2.0

toString

public String toString()

String representation of this file comparator.

覆盖:

toString 在类中 Object

返回:

String representation of this file comparator