Java Foundation Classes in a Nutshell

CHAPTER 27

Thejavax.swing.filechooser Package

The javax.swing .filechooser package defines auxiliary classes used by the javax.-

swing .JFileChooser component. You can customize the behavior of a JF ileChooser by

defining concrete subclasses of these abstract classes. Define a FileF ilter to specify

what files should be displayed by the JF ileChooser. Define a FileV iew to specify how

it should display those classes. And define a FileSystemV iew to specify how it should

traverse the file system. Figure 27-1 shows the class hierarchy of this package.

ABSTRACT CLASS

extends

KEY

CLASS

javax.swing.filechooser

java.lang

Object

FileFilter

FileSystemView

FileView

Figur e 27−1: The javax.swing.filechooser package

FileF ilter Ja va 1.2

javax.swing .filechooser

This abstract class defines the methods used by the JF ileChooser component to select a

subset of files for display. When the accept() method is passed a File object, it should

retur n tr ue if that file should be displayed by the JF ileChooser and false otherwise. accept()

often makes its determination based on the filename extension, but it can also take

other factors into account, such as the readability and writability of the file. The getDe-

scription() method must retur nahuman-r eadable description (preferably localized for

the current locale) of the filtering operation perfor med by the filter. For example, if a

javax.swing.

filechooser

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