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Java Fundamental Classes Reference

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The java.io Package
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FilenameFilter

Name

FilenameFilter

Synopsis

Interface Name:

java.io.FilenameFilter

Super-interface:

None

Immediate Sub-interfaces:

None

Implemented by:

None

Availability:

JDK 1.0 or later

Description

The FilenameFilter interface is implemented by a class that wants to filter the filenames that should be included in a list of filenames. For example, the list() method of the File class can take a FilenameFilter object to filter the filenames that are listed. The java.awt.FileDialog class also uses a FilenameFilter to limit the choices that are presented to the user.

Interface Declaration

public abstract interface java.io.FilenameFilter {
  // Methods
  public abstract boolean accept(File dir, String name);
}

Methods

accept

public abstract boolean accept(File dir, String name)

Parameters

dir

The directory that contains the file.

name

The name of the file.

Returns

true if the file should be shown; false otherwise.

Description

This method returns a boolean value that indicates whether or not a file should be included in a list of filenames. The method should return true if a file should be included; otherwise it should return false. A simple filter might return true for filenames with a certain extension, like .java. A more complex filter could check the directory name, the file's readability, and last modification time, for example.

See Also

File


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