Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class FileView - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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javax.swing.filechooser
Class FileView

java.lang.Object
  |
  +--javax.swing.filechooser.FileView

Direct Known Subclasses:: BasicFileChooserUI.BasicFileView

public abstract class FileView
extends Object

FileView defines an abstract class that can be implemented to provide the filechooser with ui information for a File. Each L&F JFileChooserUI object implements this class to pass back the correct icons and type descriptions specific to that L&F. For example, the Windows L&F returns the generic Windows icons for directories and generic files. Additionally, you may want to provide your own FileView to JFileChooser to return different icons or additional information using JFileChooser.setFileView(javax.swing.filechooser.FileView). JFileChooser first looks to see if there is a user defined FileView, if there is, it gets type information from there first. If FileView returns null for any method, JFileChooser then uses the L&F specific view to get the information. So, for example, if you provide a FileView class that returns an Icon for JPG files, and returns null icons for all other files, the UI's FileView will provide default icons for all other files. For an example implementation of a simple file filter, see yourJDK/demo/jfc/FileChooserDemo/ExampleFileView.java. For more information, see the Swing Connection article on the File Chooser

See Also:: JFileChooser

Constructor Summary

FileView()


Method Summary

abstract String getDescription(File f)
          A human readable description of the file.

abstract Icon getIcon(File f)
          The icon that represents this file in the JFileChooser.

abstract String getName(File f)
          The name of the file.

abstract String getTypeDescription(File f)
          A human readable description of the type of the file.

abstract Boolean isTraversable(File f)
          Whether the directory is traversable or not.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileView

public FileView()

Method Detail

getName

public abstract String getName(File f)

The name of the file. Normally this would be simply f.getName()

getDescription

public abstract String getDescription(File f)

A human readable description of the file. For example, a file named jag.jpg might have a description that read: "A JPEG image file of James Gosling's face"

getTypeDescription

public abstract String getTypeDescription(File f)

A human readable description of the type of the file. For example, a jpg file might have a type description of: "A JPEG Compressed Image File"

getIcon

public abstract Icon getIcon(File f)

The icon that represents this file in the JFileChooser.

isTraversable

public abstract Boolean isTraversable(File f)

Whether the directory is traversable or not. This might be useful, for example, if you want a directory to represent a compound document and don't want the user to descend into it.