org.apache.commons.io.comparator

类 CompositeFileComparator

java.lang.Object

org.apache.commons.io.comparator.CompositeFileComparator

所有已实现的接口:

Serializable, Comparator<File>

public class CompositeFileComparator
extends Object
implements Serializable

Compare two files using a set of delegate file Comparator.

This comparator can be used to sort lists or arrays of files by combining a number other comparators.

Example of sorting a list of files by type (i.e. directory or file) and then by name:

       CompositeFileComparator comparator =
                       new CompositeFileComparator(
                                 (AbstractFileComparator) DirectoryFileComparator.DIRECTORY_COMPARATOR,
                                 (AbstractFileComparator) NameFileComparator.NAME_COMPARATOR);
       List<File> list = ...
       comparator.sort(list);
 

从以下版本开始:

2.0

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
CompositeFileComparator(Comparator<File>... delegates) Create a composite comparator for the set of delegate comparators.
CompositeFileComparator(Iterable<Comparator<File>> delegates) Create a composite comparator for the set of delegate comparators.

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 delegate comparators.
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

构造器详细资料

CompositeFileComparator

public CompositeFileComparator(Comparator<File>... delegates)

Create a composite comparator for the set of delegate comparators.

参数:

delegates - The delegate file comparators

CompositeFileComparator

public CompositeFileComparator(Iterable<Comparator<File>> delegates)

Create a composite comparator for the set of delegate comparators.

参数:

delegates - The delegate file comparators

方法详细资料

compare

public int compare(File file1,
                   File file2)

Compare the two files using delegate comparators.

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 first non-zero result returned from the delegate comparators or zero.

toString

public String toString()

String representation of this file comparator.

返回:

String representation of this file comparator

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