uk.ac.essex.ia.util
Class MyFileFilter

java.lang.Object
  javax.swing.filechooser.FileFilter
      uk.ac.essex.ia.util.MyFileFilter

public class MyFileFilter
extends javax.swing.filechooser.FileFilter

A convenience implementation of FileFilter that filters out all files except for those type extensions that it knows about. Extensions are of the type ".foo", which is typically found on Windows and Unix boxes, but not on Macinthosh. Case is ignored. Example - create a new filter that filerts out all files but gif and jpg image files: JFileChooser fileChooser = new JFileChooser(); MyFileFilter filter = new MyFileFilter( new String{"gif", "jpg"}, "JPEG & GIF Images") fileChooser.addChoosableFileFilter(filter); fileChooser.showOpenDialog(this);

Constructor Summary

MyFileFilter()
Creates a file filter.

MyFileFilter(java.lang.String extension)
Creates a file filter that accepts files with the given extension.

MyFileFilter(java.lang.String[] filters)
Creates a file filter from the given string array.

MyFileFilter(java.lang.String[] filters, java.lang.String description)
Creates a file filter from the given string array and description.

MyFileFilter(java.lang.String extension, java.lang.String description)
Creates a file filter that accepts the given file type.

Method Summary

boolean	accept(java.io.File f)
void	addExtension(java.lang.String extension) Adds a filetype "dot" extension to filter against.
java.lang.String	getDescription() For example: "JPEG and GIF Image Files (*.jpg, *.gif)"
java.lang.String	getExtension()
java.lang.String	getExtension(java.io.File f)
boolean	isExtensionListInDescription() Returns whether the extension list (.jpg, .gif, etc) should show up in the human readable description.
void	setDescription(java.lang.String description) Sets the human readable description of this filter.
void	setExtensionListInDescription(boolean b) Determines whether the extension list (.jpg, .gif, etc) should show up in the human readable description.

Methods inherited from class java.lang.Object

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

Constructor Detail

MyFileFilter

public MyFileFilter()

Creates a file filter. If no filters are added, then all files are accepted.

See Also:

addExtension(java.lang.String)

MyFileFilter

public MyFileFilter(java.lang.String extension)

Creates a file filter that accepts files with the given extension. Example: new ImageFileFilter("jpg");

See Also:

addExtension(java.lang.String)

MyFileFilter

public MyFileFilter(java.lang.String extension,
                    java.lang.String description)

Creates a file filter that accepts the given file type. Example: new ImageFileFilter("jpg", "JPEG Image Images"); Note that the "." before the extension is not needed. If provided, it will be ignored.

See Also:

addExtension(java.lang.String)

MyFileFilter

public MyFileFilter(java.lang.String[] filters)

Creates a file filter from the given string array. Example: new ImageFileFilter(String {"gif", "jpg"}); Note that the "." before the extension is not needed adn will be ignored.

See Also:

addExtension(java.lang.String)

MyFileFilter

public MyFileFilter(java.lang.String[] filters,
                    java.lang.String description)

Creates a file filter from the given string array and description. Example: new ImageFileFilter(String{"gif", "jpg"}, "Gif and JPG Images"); Note that the "." before the extension is not needed and will be ignored.

See Also:

addExtension(java.lang.String)

Method Detail

accept

public boolean accept(java.io.File f)

Specified by:

accept in class javax.swing.filechooser.FileFilter

Returns:

true if this file should be shown in the directory pane, false if it shouldn't. Files that begin with "." are ignored.

See Also:

getExtension(java.io.File), FileFilter.accept(java.io.File)

getExtension

public java.lang.String getExtension(java.io.File f)

Returns:

the extension portion of the file's name .

See Also:

getExtension(java.io.File), FileFilter.accept(java.io.File)

getExtension

public java.lang.String getExtension()

Returns:

the extensions that this filter provides

addExtension

public void addExtension(java.lang.String extension)

Adds a filetype "dot" extension to filter against. For example: the following code will create a filter that filters out all files except those that end in ".jpg" and ".tif": MyFileFilter filter = new MyFileFilter(); filter.addExtension("jpg"); filter.addExtension("tif"); Note that the "." before the extension is not needed and will be ignored.

getDescription

public java.lang.String getDescription()

For example: "JPEG and GIF Image Files (*.jpg, *.gif)"

Specified by:

getDescription in class javax.swing.filechooser.FileFilter

Returns:

the human readable description of this filter.

See Also:

setDescription(java.lang.String), setExtensionListInDescription(boolean), isExtensionListInDescription(), FileFilter.getDescription()

setDescription

public void setDescription(java.lang.String description)

Sets the human readable description of this filter. For example: filter.setDescription("Gif and JPG Images");

See Also:

setDescription(java.lang.String), setExtensionListInDescription(boolean), isExtensionListInDescription()

setExtensionListInDescription

public void setExtensionListInDescription(boolean b)

Determines whether the extension list (.jpg, .gif, etc) should show up in the human readable description. Only relevent if a description was provided in the constructor or using setDescription();

See Also:

getDescription(), setDescription(java.lang.String), isExtensionListInDescription()

isExtensionListInDescription

public boolean isExtensionListInDescription()

Returns whether the extension list (.jpg, .gif, etc) should show up in the human readable description. Only relevent if a description was provided in the constructor or using setDescription();

See Also:

getDescription(), setDescription(java.lang.String), setExtensionListInDescription(boolean)