javax.swing
Class JFileChooser

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.JComponent
                    |
                    +--javax.swing.JFileChooser

All Implemented Interfaces:

Accessible, ImageObserver, MenuContainer, Serializable

public class JFileChooser

extends JComponent

implements Accessible

JFileChooser provides a simple mechanism for the user to choose a file. For information about using JFileChooser, see How to Use File Choosers, a section in The Java Tutorial.

The following code pops up a file chooser for the user's home directory that sees only .jpg and .gif images:

    JFileChooser chooser = new JFileChooser();
    // Note: source for ExampleFileFilter can be found in FileChooserDemo,
    // under the demo/jfc directory in the Java 2 SDK, Standard Edition.
    ExampleFileFilter filter = new ExampleFileFilter();
    filter.addExtension("jpg");
    filter.addExtension("gif");
    filter.setDescription("JPG & GIF Images");
    chooser.setFileFilter(filter);
    int returnVal = chooser.showOpenDialog(parent);
    if(returnVal == JFileChooser.APPROVE_OPTION) {
       System.out.println("You chose to open this file: " +
            chooser.getSelectedFile().getName());
    }
 

Nested Class Summary

protected class

JFileChooser.AccessibleJFileChooser This class implements accessibility support for the JFileChooser class.

Nested classes inherited from class javax.swing.JComponent

Nested classes inherited from class java.awt.Container

Nested classes inherited from class java.awt.Component

Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

static String	ACCEPT_ALL_FILE_FILTER_USED_CHANGED_PROPERTY Identifies whether a the AcceptAllFileFilter is used or not.
protected AccessibleContext	accessibleContext
static String	ACCESSORY_CHANGED_PROPERTY Says that a different accessory component is in use (for example, to preview files).
static String	APPROVE_BUTTON_MNEMONIC_CHANGED_PROPERTY Identifies change in the mnemonic for the approve (yes, ok) button.
static String	APPROVE_BUTTON_TEXT_CHANGED_PROPERTY Identifies change in the text on the approve (yes, ok) button.
static String	APPROVE_BUTTON_TOOL_TIP_TEXT_CHANGED_PROPERTY Identifies change in the tooltip text for the approve (yes, ok) button.
static int	APPROVE_OPTION Return value if approve (yes, ok) is chosen.
static String	APPROVE_SELECTION Instruction to approve the current selection (same as pressing yes or ok).
static int	CANCEL_OPTION Return value if cancel is chosen.
static String	CANCEL_SELECTION Instruction to cancel the current selection.
static String	CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY Identifies a change in the list of predefined file filters the user can choose from.
static String	CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY Instruction to display the control buttons.
static int	CUSTOM_DIALOG Type value indicating that the JFileChooser supports a developer-specified file operation.
static String	DIALOG_TITLE_CHANGED_PROPERTY Identifies a change in the dialog title.
static String	DIALOG_TYPE_CHANGED_PROPERTY Identifies a change in the type of files displayed (files only, directories only, or both files and directories).
static int	DIRECTORIES_ONLY Instruction to display only directories.
static String	DIRECTORY_CHANGED_PROPERTY Identifies user's directory change.
static int	ERROR_OPTION Return value if an error occured.
static String	FILE_FILTER_CHANGED_PROPERTY User changed the kind of files to display.
static String	FILE_HIDING_CHANGED_PROPERTY Identifies a change in the display-hidden-files property.
static String	FILE_SELECTION_MODE_CHANGED_PROPERTY Identifies a change in the kind of selection (single, multiple, etc.).
static String	FILE_SYSTEM_VIEW_CHANGED_PROPERTY Says that a different object is being used to find available drives on the system.
static String	FILE_VIEW_CHANGED_PROPERTY Says that a different object is being used to retrieve file information.
static int	FILES_AND_DIRECTORIES Instruction to display both files and directories.
static int	FILES_ONLY Instruction to display only files.
static String	MULTI_SELECTION_ENABLED_CHANGED_PROPERTY Enables multiple-file selections.
static int	OPEN_DIALOG Type value indicating that the JFileChooser supports an "Open" file operation.
static int	SAVE_DIALOG Type value indicating that the JFileChooser supports a "Save" file operation.
static String	SELECTED_FILE_CHANGED_PROPERTY Identifies change in user's single-file selection.
static String	SELECTED_FILES_CHANGED_PROPERTY Identifies change in user's multiple-file selection.

Fields inherited from class javax.swing.JComponent

listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

JFileChooser()
Constructs a JFileChooser pointing to the user's default directory.

JFileChooser(File currentDirectory)
Constructs a JFileChooser using the given File as the path.

JFileChooser(File currentDirectory, FileSystemView fsv)
Constructs a JFileChooser using the given current directory and FileSystemView.

JFileChooser(FileSystemView fsv)
Constructs a JFileChooser using the given FileSystemView.

JFileChooser(String currentDirectoryPath)
Constructs a JFileChooser using the given path.

JFileChooser(String currentDirectoryPath, FileSystemView fsv)
Constructs a JFileChooser using the given current directory path and FileSystemView.

Method Summary

boolean	accept(File f) Returns true if the file should be displayed.
void	addActionListener(ActionListener l) Adds an ActionListener to the file chooser.
void	addChoosableFileFilter(FileFilter filter) Adds a filter to the list of user choosable file filters.
void	approveSelection() Called by the UI when the user hits the Approve button (labeled "Open" or "Save", by default).
void	cancelSelection() Called by the UI when the user chooses the Cancel button.
void	changeToParentDirectory() Changes the directory to be set to the parent of the current directory.
protected JDialog	createDialog(Component parent) Creates and returns a new JDialog wrapping this centered on the parent in the parent's frame.
void	ensureFileIsVisible(File f) Makes sure that the specified file is viewable, and not hidden.
protected void	fireActionPerformed(String command) Notifies all listeners that have registered interest for notification on this event type.
FileFilter	getAcceptAllFileFilter() Returns the AcceptAll file filter.
AccessibleContext	getAccessibleContext() Gets the AccessibleContext associated with this JFileChooser.
JComponent	getAccessory() Returns the accessory component.
ActionListener[]	getActionListeners() Returns an array of all the action listeners registered on this file chooser.
int	getApproveButtonMnemonic() Returns the approve button's mnemonic.
String	getApproveButtonText() Returns the text used in the ApproveButton in the FileChooserUI.
String	getApproveButtonToolTipText() Returns the tooltip text used in the ApproveButton.
FileFilter[]	getChoosableFileFilters() Gets the list of user choosable file filters.
boolean	getControlButtonsAreShown() Returns the value of the controlButtonsAreShown property.
File	getCurrentDirectory() Returns the current directory.
String	getDescription(File f) Returns the file description.
String	getDialogTitle() Gets the string that goes in the JFileChooser's titlebar.
int	getDialogType() Returns the type of this dialog.
boolean	getDragEnabled() Gets the value of the dragEnabled property.
FileFilter	getFileFilter() Returns the currently selected file filter.
int	getFileSelectionMode() Returns the current file-selection mode.
FileSystemView	getFileSystemView() Returns the file system view.
FileView	getFileView() Returns the current file view.
Icon	getIcon(File f) Returns the icon for this file or type of file, depending on the system.
String	getName(File f) Returns the filename.
File	getSelectedFile() Returns the selected file.
File[]	getSelectedFiles() Returns a list of selected files if the file chooser is set to allow multiple selection.
String	getTypeDescription(File f) Returns the file type.
FileChooserUI	getUI() Gets the UI object which implements the L&F for this component.
String	getUIClassID() Returns a string that specifies the name of the L&F class that renders this component.
boolean	isAcceptAllFileFilterUsed() Returns whether the AcceptAll FileFilter is used.
boolean	isDirectorySelectionEnabled() Convenience call that determines if directories are selectable based on the current file selection mode.
boolean	isFileHidingEnabled() Returns true if hidden files are not shown in the file chooser; otherwise, returns false.
boolean	isFileSelectionEnabled() Convenience call that determines if files are selectable based on the current file selection mode.
boolean	isMultiSelectionEnabled() Returns true if multiple files can be selected.
boolean	isTraversable(File f) Returns true if the file (directory) can be visited.
protected String	paramString() Returns a string representation of this JFileChooser.
void	removeActionListener(ActionListener l) Removes an ActionListener from the file chooser.
boolean	removeChoosableFileFilter(FileFilter f) Removes a filter from the list of user choosable file filters.
void	rescanCurrentDirectory() Tells the UI to rescan its files list from the current directory.
void	resetChoosableFileFilters() Resets the choosable file filter list to its starting state.
void	setAcceptAllFileFilterUsed(boolean b) Determines whether the AcceptAll FileFilter is used as an available choice in the choosable filter list.
void	setAccessory(JComponent newAccessory) Sets the accessory component.
void	setApproveButtonMnemonic(char mnemonic) Sets the approve button's mnemonic using a character.
void	setApproveButtonMnemonic(int mnemonic) Sets the approve button's mnemonic using a numeric keycode.
void	setApproveButtonText(String approveButtonText) Sets the text used in the ApproveButton in the FileChooserUI.
void	setApproveButtonToolTipText(String toolTipText) Sets the tooltip text used in the ApproveButton.
void	setControlButtonsAreShown(boolean b) Sets the property that indicates whether the approve and cancel buttons are shown in the file chooser.
void	setCurrentDirectory(File dir) Sets the current directory.
void	setDialogTitle(String dialogTitle) Sets the string that goes in the JFileChooser window's title bar.
void	setDialogType(int dialogType) Sets the type of this dialog.
void	setDragEnabled(boolean b) Sets the dragEnabled property, which must be true to enable automatic drag handling (the first part of drag and drop) on this component.
void	setFileFilter(FileFilter filter) Sets the current file filter.
void	setFileHidingEnabled(boolean b) Sets file hiding on or off.
void	setFileSelectionMode(int mode) Sets the JFileChooser to allow the user to just select files, just select directories, or select both files and directories.
void	setFileSystemView(FileSystemView fsv) Sets the file system view that the JFileChooser uses for accessing and creating file system resources, such as finding the floppy drive and getting a list of root drives.
void	setFileView(FileView fileView) Sets the file view to used to retrieve UI information, such as the icon that represents a file or the type description of a file.
void	setMultiSelectionEnabled(boolean b) Sets the file chooser to allow multiple file selections.
void	setSelectedFile(File file) Sets the selected file.
void	setSelectedFiles(File[] selectedFiles) Sets the list of selected files if the file chooser is set to allow multiple selection.
protected void	setup(FileSystemView view) Performs common constructor initialization and setup.
int	showDialog(Component parent, String approveButtonText) Pops a custom file chooser dialog with a custom approve button.
int	showOpenDialog(Component parent) Pops up an "Open File" file chooser dialog.
int	showSaveDialog(Component parent) Pops up a "Save File" file chooser dialog.
void	updateUI() Resets the UI property to a value from the current look and feel.

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getGraphics, getHeight, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Field Detail

OPEN_DIALOG

public static final int OPEN_DIALOG

Type value indicating that the JFileChooser supports an "Open" file operation.

See Also:

Constant Field Values

SAVE_DIALOG

public static final int SAVE_DIALOG

Type value indicating that the JFileChooser supports a "Save" file operation.

See Also:

Constant Field Values

CUSTOM_DIALOG

public static final int CUSTOM_DIALOG

Type value indicating that the JFileChooser supports a developer-specified file operation.

See Also:

Constant Field Values

CANCEL_OPTION

public static final int CANCEL_OPTION

Return value if cancel is chosen.

See Also:

Constant Field Values

APPROVE_OPTION

public static final int APPROVE_OPTION

Return value if approve (yes, ok) is chosen.

See Also:

Constant Field Values

ERROR_OPTION

public static final int ERROR_OPTION

Return value if an error occured.

See Also:

Constant Field Values

FILES_ONLY

public static final int FILES_ONLY

Instruction to display only files.

See Also:

Constant Field Values

DIRECTORIES_ONLY

public static final int DIRECTORIES_ONLY

Instruction to display only directories.

See Also:

Constant Field Values

FILES_AND_DIRECTORIES

public static final int FILES_AND_DIRECTORIES

Instruction to display both files and directories.

See Also:

Constant Field Values

CANCEL_SELECTION

public static final String CANCEL_SELECTION

Instruction to cancel the current selection.

See Also:

Constant Field Values

APPROVE_SELECTION

public static final String APPROVE_SELECTION

Instruction to approve the current selection (same as pressing yes or ok).

See Also:

Constant Field Values

APPROVE_BUTTON_TEXT_CHANGED_PROPERTY

public static final String APPROVE_BUTTON_TEXT_CHANGED_PROPERTY

Identifies change in the text on the approve (yes, ok) button.

See Also:

Constant Field Values

APPROVE_BUTTON_TOOL_TIP_TEXT_CHANGED_PROPERTY

public static final String APPROVE_BUTTON_TOOL_TIP_TEXT_CHANGED_PROPERTY

Identifies change in the tooltip text for the approve (yes, ok) button.

See Also:

Constant Field Values

APPROVE_BUTTON_MNEMONIC_CHANGED_PROPERTY

public static final String APPROVE_BUTTON_MNEMONIC_CHANGED_PROPERTY

Identifies change in the mnemonic for the approve (yes, ok) button.

See Also:

Constant Field Values

CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY

public static final String CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY

Instruction to display the control buttons.

See Also:

Constant Field Values

DIRECTORY_CHANGED_PROPERTY

public static final String DIRECTORY_CHANGED_PROPERTY

Identifies user's directory change.

See Also:

Constant Field Values

SELECTED_FILE_CHANGED_PROPERTY

public static final String SELECTED_FILE_CHANGED_PROPERTY

Identifies change in user's single-file selection.

See Also:

Constant Field Values

SELECTED_FILES_CHANGED_PROPERTY

public static final String SELECTED_FILES_CHANGED_PROPERTY

Identifies change in user's multiple-file selection.

See Also:

Constant Field Values

MULTI_SELECTION_ENABLED_CHANGED_PROPERTY

public static final String MULTI_SELECTION_ENABLED_CHANGED_PROPERTY

Enables multiple-file selections.

See Also:

Constant Field Values

FILE_SYSTEM_VIEW_CHANGED_PROPERTY

public static final String FILE_SYSTEM_VIEW_CHANGED_PROPERTY

Says that a different object is being used to find available drives on the system.

See Also:

Constant Field Values

FILE_VIEW_CHANGED_PROPERTY

public static final String FILE_VIEW_CHANGED_PROPERTY

Says that a different object is being used to retrieve file information.

See Also:

Constant Field Values

FILE_HIDING_CHANGED_PROPERTY

public static final String FILE_HIDING_CHANGED_PROPERTY

Identifies a change in the display-hidden-files property.

See Also:

Constant Field Values

FILE_FILTER_CHANGED_PROPERTY

public static final String FILE_FILTER_CHANGED_PROPERTY

User changed the kind of files to display.

See Also:

Constant Field Values

FILE_SELECTION_MODE_CHANGED_PROPERTY

public static final String FILE_SELECTION_MODE_CHANGED_PROPERTY

Identifies a change in the kind of selection (single, multiple, etc.).

See Also:

Constant Field Values

ACCESSORY_CHANGED_PROPERTY

public static final String ACCESSORY_CHANGED_PROPERTY

Says that a different accessory component is in use (for example, to preview files).

See Also:

Constant Field Values

ACCEPT_ALL_FILE_FILTER_USED_CHANGED_PROPERTY

public static final String ACCEPT_ALL_FILE_FILTER_USED_CHANGED_PROPERTY

Identifies whether a the AcceptAllFileFilter is used or not.

See Also:

Constant Field Values

DIALOG_TITLE_CHANGED_PROPERTY

public static final String DIALOG_TITLE_CHANGED_PROPERTY

Identifies a change in the dialog title.

See Also:

Constant Field Values

DIALOG_TYPE_CHANGED_PROPERTY

public static final String DIALOG_TYPE_CHANGED_PROPERTY

Identifies a change in the type of files displayed (files only, directories only, or both files and directories).

See Also:

Constant Field Values

CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY

public static final String CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY

Identifies a change in the list of predefined file filters the user can choose from.

See Also:

Constant Field Values

accessibleContext

protected AccessibleContext accessibleContext

Constructor Detail

JFileChooser

public JFileChooser()

Constructs a JFileChooser pointing to the user's default directory. This default depends on the operating system. It is typically the "My Documents" folder on Windows, and the user's home directory on Unix.

JFileChooser

public JFileChooser(String currentDirectoryPath)

Constructs a JFileChooser using the given path. Passing in a null string causes the file chooser to point to the user's default directory. This default depends on the operating system. It is typically the "My Documents" folder on Windows, and the user's home directory on Unix.

Parameters:

currentDirectoryPath - a String giving the path to a file or directory

JFileChooser

public JFileChooser(File currentDirectory)

Constructs a JFileChooser using the given File as the path. Passing in a null file causes the file chooser to point to the user's default directory. This default depends on the operating system. It is typically the "My Documents" folder on Windows, and the user's home directory on Unix.

Parameters:

currentDirectory - a File object specifying the path to a file or directory

JFileChooser

public JFileChooser(FileSystemView fsv)

Constructs a JFileChooser using the given FileSystemView.

JFileChooser

public JFileChooser(File currentDirectory,
                    FileSystemView fsv)

Constructs a JFileChooser using the given current directory and FileSystemView.

JFileChooser

public JFileChooser(String currentDirectoryPath,
                    FileSystemView fsv)

Constructs a JFileChooser using the given current directory path and FileSystemView.

Method Detail

setup

protected void setup(FileSystemView view)

Performs common constructor initialization and setup.

setDragEnabled

public void setDragEnabled(boolean b)

Sets the dragEnabled property, which must be true to enable automatic drag handling (the first part of drag and drop) on this component. The transferHandler property needs to be set to a non-null value for the drag to do anything. The default value of the dragEnabled property is false.

When automatic drag handling is enabled, most look and feels begin a drag-and-drop operation whenever the user presses the mouse button over a selection and then moves the mouse a few pixels. Setting this property to true can therefore have a subtle effect on how selections behave.

Some look and feels might not support automatic drag and drop; they will ignore this property. You can work around such look and feels by modifying the component to directly call the exportAsDrag method of a TransferHandler.

Parameters:

b - the value to set the dragEnabled property to

Throws:

HeadlessException - if b is true and GraphicsEnvironment.isHeadless() returns true

Since:

1.4

See Also:

GraphicsEnvironment.isHeadless(), getDragEnabled(), JComponent.setTransferHandler(javax.swing.TransferHandler), TransferHandler

getDragEnabled

public boolean getDragEnabled()

Gets the value of the dragEnabled property.

Returns:

the value of the dragEnabled property

Since:

1.4

See Also:

setDragEnabled(boolean)

getSelectedFile

public File getSelectedFile()

Returns the selected file. This can be set either by the programmer via setFile or by a user action, such as either typing the filename into the UI or selecting the file from a list in the UI.

Returns:

the selected file

See Also:

setSelectedFile(java.io.File)

setSelectedFile

public void setSelectedFile(File file)

Sets the selected file. If the file's parent directory is not the current directory, changes the current directory to be the file's parent directory.

Parameters:

file - the selected file

See Also:

getSelectedFile()

getSelectedFiles

public File[] getSelectedFiles()

Returns a list of selected files if the file chooser is set to allow multiple selection.

setSelectedFiles

public void setSelectedFiles(File[] selectedFiles)

Sets the list of selected files if the file chooser is set to allow multiple selection.

getCurrentDirectory

public File getCurrentDirectory()

Returns the current directory.

Returns:

the current directory

See Also:

setCurrentDirectory(java.io.File)

setCurrentDirectory

public void setCurrentDirectory(File dir)

Sets the current directory. Passing in null sets the file chooser to point to the user's default directory. This default depends on the operating system. It is typically the "My Documents" folder on Windows, and the user's home directory on Unix. If the file passed in as currentDirectory is not a directory, the parent of the file will be used as the currentDirectory. If the parent is not traversable, then it will walk up the parent tree until it finds a traversable directory, or hits the root of the file system.

Parameters:

dir - the current directory to point to

See Also:

getCurrentDirectory()

changeToParentDirectory

public void changeToParentDirectory()

Changes the directory to be set to the parent of the current directory.

See Also:

getCurrentDirectory()

rescanCurrentDirectory

public void rescanCurrentDirectory()

Tells the UI to rescan its files list from the current directory.

ensureFileIsVisible

public void ensureFileIsVisible(File f)

Makes sure that the specified file is viewable, and not hidden.

Parameters:

f - a File object

showOpenDialog

public int showOpenDialog(Component parent)
                   throws HeadlessException

Pops up an "Open File" file chooser dialog. Note that the text that appears in the approve button is determined by the L&F.

Parameters:

parent - the parent component of the dialog, can be null; see showDialog for details

Returns:

the return state of the file chooser on popdown:

• JFileChooser.CANCEL_OPTION
• JFileChooser.APPROVE_OPTION
• JFileCHooser.ERROR_OPTION if an error occurs or the dialog is dismissed

Throws:

HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

See Also:

GraphicsEnvironment.isHeadless(), showDialog(java.awt.Component, java.lang.String)

showSaveDialog

public int showSaveDialog(Component parent)
                   throws HeadlessException

Pops up a "Save File" file chooser dialog. Note that the text that appears in the approve button is determined by the L&F.

Parameters:

parent - the parent component of the dialog, can be null; see showDialog for details

Returns:

the return state of the file chooser on popdown:

• JFileChooser.CANCEL_OPTION
• JFileChooser.APPROVE_OPTION
• JFileCHooser.ERROR_OPTION if an error occurs or the dialog is dismissed

Throws:

HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

See Also:

GraphicsEnvironment.isHeadless(), showDialog(java.awt.Component, java.lang.String)

showDialog

public int showDialog(Component parent,
                      String approveButtonText)
               throws HeadlessException

Pops a custom file chooser dialog with a custom approve button. For example, the following code pops up a file chooser with a "Run Application" button (instead of the normal "Save" or "Open" button):

 filechooser.showDialog(parentFrame, "Run Application");
 

Alternatively, the following code does the same thing:

    JFileChooser chooser = new JFileChooser(null);
    chooser.setApproveButtonText("Run Application");
    chooser.showDialog(parentFrame, null);
 

The parent argument determines two things: the frame on which the open dialog depends and the component whose position the look and feel should consider when placing the dialog. If the parent is a Frame object (such as a JFrame) then the dialog depends on the frame and the look and feel positions the dialog relative to the frame (for example, centered over the frame). If the parent is a component, then the dialog depends on the frame containing the component, and is positioned relative to the component (for example, centered over the component). If the parent is null, then the dialog depends on no visible window, and it's placed in a look-and-feel-dependent position such as the center of the screen.

Parameters:

parent - the parent component of the dialog; can be null

approveButtonText - the text of the ApproveButton

Returns:

the return state of the file chooser on popdown:

• JFileChooser.CANCEL_OPTION
• JFileChooser.APPROVE_OPTION
• JFileCHooser.ERROR_OPTION if an error occurs or the dialog is dismissed

Throws:

HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

See Also:

GraphicsEnvironment.isHeadless()

createDialog

protected JDialog createDialog(Component parent)
                        throws HeadlessException

Creates and returns a new JDialog wrapping this centered on the parent in the parent's frame. This method can be overriden to further manipulate the dialog, to disable resizing, set the location, etc. Example:

     class MyFileChooser extends JFileChooser {
         protected JDialog createDialog(Component parent) throws HeadlessException {
             JDialog dialog = super.createDialog(parent);
             dialog.setLocation(300, 200);
             dialog.setResizable(false);
             return dialog;
         }
     }
 

Parameters:

parent - the parent component of the dialog; can be null

Returns:

a new JDialog containing this instance

Throws:

HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

Since:

1.4

See Also:

GraphicsEnvironment.isHeadless()

getControlButtonsAreShown

public boolean getControlButtonsAreShown()

Returns the value of the controlButtonsAreShown property.

Returns:

the value of the controlButtonsAreShown property

Since:

1.3

See Also:

setControlButtonsAreShown(boolean)

setControlButtonsAreShown

public void setControlButtonsAreShown(boolean b)

Sets the property that indicates whether the approve and cancel buttons are shown in the file chooser. This property is true by default. Look and feels that always show these buttons will ignore the value of this property. This method fires a property-changed event, using the string value of CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY as the name of the property.

Parameters:

b - false if control buttons should not be shown; otherwise, true

Since:

1.3

See Also:

getControlButtonsAreShown(), CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY

getDialogType

public int getDialogType()

Returns the type of this dialog. The default is JFileChooser.OPEN_DIALOG.

Returns:

the type of dialog to be displayed:

• JFileChooser.OPEN_DIALOG
• JFileChooser.SAVE_DIALOG
• JFileChooser.CUSTOM_DIALOG

See Also:

setDialogType(int)

setDialogType

public void setDialogType(int dialogType)

Sets the type of this dialog. Use OPEN_DIALOG when you want to bring up a file chooser that the user can use to open a file. Likewise, use SAVE_DIALOG for letting the user choose a file for saving. Use CUSTOM_DIALOG when you want to use the file chooser in a context other than "Open" or "Save". For instance, you might want to bring up a file chooser that allows the user to choose a file to execute. Note that you normally would not need to set the JFileChooser to use CUSTOM_DIALOG since a call to setApproveButtonText does this for you. The default dialog type is JFileChooser.OPEN_DIALOG.

Parameters:

dialogType - the type of dialog to be displayed:

• JFileChooser.OPEN_DIALOG
• JFileChooser.SAVE_DIALOG
• JFileChooser.CUSTOM_DIALOG

Throws:

IllegalArgumentException - if dialogType is not legal

See Also:

getDialogType(), setApproveButtonText(java.lang.String)

setDialogTitle

public void setDialogTitle(String dialogTitle)

Sets the string that goes in the JFileChooser window's title bar.

Parameters:

dialogTitle - the new String for the title bar

See Also:

getDialogTitle()

getDialogTitle

public String getDialogTitle()

Gets the string that goes in the JFileChooser's titlebar.

See Also:

setDialogTitle(java.lang.String)

setApproveButtonToolTipText

public void setApproveButtonToolTipText(String toolTipText)

Sets the tooltip text used in the ApproveButton. If null, the UI object will determine the button's text.

Returns:

the text used in the ApproveButton

See Also:

setApproveButtonText(java.lang.String), setDialogType(int), showDialog(java.awt.Component, java.lang.String)

getApproveButtonToolTipText

public String getApproveButtonToolTipText()

Returns the tooltip text used in the ApproveButton. If null, the UI object will determine the button's text.

Returns:

the text used in the ApproveButton

See Also:

setApproveButtonText(java.lang.String), setDialogType(int), showDialog(java.awt.Component, java.lang.String)

getApproveButtonMnemonic

public int getApproveButtonMnemonic()

Returns the approve button's mnemonic.

Returns:

an integer value for the mnemonic key

See Also:

setApproveButtonMnemonic(int)

setApproveButtonMnemonic

public void setApproveButtonMnemonic(int mnemonic)

Sets the approve button's mnemonic using a numeric keycode.

Parameters:

mnemonic - an integer value for the mnemonic key

See Also:

getApproveButtonMnemonic()

setApproveButtonMnemonic

public void setApproveButtonMnemonic(char mnemonic)

Sets the approve button's mnemonic using a character.

Parameters:

mnemonic - a character value for the mnemonic key

See Also:

getApproveButtonMnemonic()

setApproveButtonText

public void setApproveButtonText(String approveButtonText)

Sets the text used in the ApproveButton in the FileChooserUI.

Parameters:

approveButtonText - the text used in the ApproveButton

See Also:

getApproveButtonText(), setDialogType(int), showDialog(java.awt.Component, java.lang.String)

getApproveButtonText

public String getApproveButtonText()

Returns the text used in the ApproveButton in the FileChooserUI. If null, the UI object will determine the button's text. Typically, this would be "Open" or "Save".

Returns:

the text used in the ApproveButton

See Also:

setApproveButtonText(java.lang.String), setDialogType(int), showDialog(java.awt.Component, java.lang.String)

getChoosableFileFilters

public FileFilter[] getChoosableFileFilters()

Gets the list of user choosable file filters.

Returns:

a FileFilter array containing all the choosable file filters

See Also:

addChoosableFileFilter(javax.swing.filechooser.FileFilter), removeChoosableFileFilter(javax.swing.filechooser.FileFilter), resetChoosableFileFilters()

addChoosableFileFilter

public void addChoosableFileFilter(FileFilter filter)

Adds a filter to the list of user choosable file filters.

Parameters:

filter - the FileFilter to add to the choosable file filter list

See Also:

getChoosableFileFilters(), removeChoosableFileFilter(javax.swing.filechooser.FileFilter), resetChoosableFileFilters()

removeChoosableFileFilter

public boolean removeChoosableFileFilter(FileFilter f)

Removes a filter from the list of user choosable file filters. Returns true if the file filter was removed.

See Also:

addChoosableFileFilter(javax.swing.filechooser.FileFilter), getChoosableFileFilters(), resetChoosableFileFilters()

resetChoosableFileFilters

public void resetChoosableFileFilters()

Resets the choosable file filter list to its starting state. Normally, this removes all added file filters while leaving the AcceptAll file filter.

See Also:

addChoosableFileFilter(javax.swing.filechooser.FileFilter), getChoosableFileFilters(), removeChoosableFileFilter(javax.swing.filechooser.FileFilter)

getAcceptAllFileFilter

public FileFilter getAcceptAllFileFilter()

Returns the AcceptAll file filter. For example, on Microsoft Windows this would be All Files (*.*).

isAcceptAllFileFilterUsed

public boolean isAcceptAllFileFilterUsed()

Returns whether the AcceptAll FileFilter is used.

Returns:

true if the AcceptAll FileFilter is used

Since:

1.3

See Also:

setAcceptAllFileFilterUsed(boolean)

setAcceptAllFileFilterUsed

public void setAcceptAllFileFilterUsed(boolean b)

Determines whether the AcceptAll FileFilter is used as an available choice in the choosable filter list. If false, the AcceptAll file filter is removed from the list of available file filters. If true, the AcceptAll file filter will become the the actively used file filter.

Since:

1.3

See Also:

isAcceptAllFileFilterUsed(), getAcceptAllFileFilter(), setFileFilter(javax.swing.filechooser.FileFilter)

getAccessory

public JComponent getAccessory()

Returns the accessory component.

Returns:

this JFileChooser's accessory component, or null

See Also:

setAccessory(javax.swing.JComponent)

setAccessory

public void setAccessory(JComponent newAccessory)

Sets the accessory component. An accessory is often used to show a preview image of the selected file; however, it can be used for anything that the programmer wishes, such as extra custom file chooser controls.

Note: if there was a previous accessory, you should unregister any listeners that the accessory might have registered with the file chooser.

setFileSelectionMode

public void setFileSelectionMode(int mode)

Sets the JFileChooser to allow the user to just select files, just select directories, or select both files and directories. The default is JFilesChooser.FILES_ONLY.

Parameters:

mode - the type of files to be displayed:

• JFileChooser.FILES_ONLY
• JFileChooser.DIRECTORIES_ONLY
• JFileChooser.FILES_AND_DIRECTORIES

Throws:

IllegalArgumentException - if mode is an illegal Dialog mode

See Also:

getFileSelectionMode()

getFileSelectionMode

public int getFileSelectionMode()

Returns the current file-selection mode. The default is JFilesChooser.FILES_ONLY.

Returns:

the type of files to be displayed, one of the following:

• JFileChooser.FILES_ONLY
• JFileChooser.DIRECTORIES_ONLY
• JFileChooser.FILES_AND_DIRECTORIES

See Also:

setFileSelectionMode(int)

isFileSelectionEnabled

public boolean isFileSelectionEnabled()

Convenience call that determines if files are selectable based on the current file selection mode.

See Also:

setFileSelectionMode(int), getFileSelectionMode()

isDirectorySelectionEnabled

public boolean isDirectorySelectionEnabled()

Convenience call that determines if directories are selectable based on the current file selection mode.

See Also:

setFileSelectionMode(int), getFileSelectionMode()

setMultiSelectionEnabled

public void setMultiSelectionEnabled(boolean b)

Sets the file chooser to allow multiple file selections.

Parameters:

b - true if multiple files may be selected

See Also:

isMultiSelectionEnabled()

isMultiSelectionEnabled

public boolean isMultiSelectionEnabled()

Returns true if multiple files can be selected.

Returns:

true if multiple files can be selected

See Also:

setMultiSelectionEnabled(boolean)

isFileHidingEnabled

public boolean isFileHidingEnabled()

Returns true if hidden files are not shown in the file chooser; otherwise, returns false.

Returns:

the status of the file hiding property

See Also:

setFileHidingEnabled(boolean)

setFileHidingEnabled

public void setFileHidingEnabled(boolean b)

Sets file hiding on or off. If true, hidden files are not shown in the file chooser. The job of determining which files are shown is done by the FileView.

Parameters:

b - the boolean value that determines whether file hiding is turned on

See Also:

isFileHidingEnabled()

setFileFilter

public void setFileFilter(FileFilter filter)

Sets the current file filter. The file filter is used by the file chooser to filter out files from the user's view.

Parameters:

filter - the new current file filter to use

See Also:

getFileFilter()

getFileFilter

public FileFilter getFileFilter()

Returns the currently selected file filter.

Returns:

the current file filter

See Also:

setFileFilter(javax.swing.filechooser.FileFilter), addChoosableFileFilter(javax.swing.filechooser.FileFilter)

setFileView

public void setFileView(FileView fileView)

Sets the file view to used to retrieve UI information, such as the icon that represents a file or the type description of a file.

See Also:

getFileView()

getFileView

public FileView getFileView()

Returns the current file view.

See Also:

setFileView(javax.swing.filechooser.FileView)

getName

public String getName(File f)

Returns the filename.

Parameters:

f - the File

Returns:

the String containing the filename for f

See Also:

FileView.getName(java.io.File)

getDescription

public String getDescription(File f)

Returns the file description.

Parameters:

f - the File

Returns:

the String containing the file description for f

See Also:

FileView.getDescription(java.io.File)

getTypeDescription

public String getTypeDescription(File f)

Returns the file type.

Parameters:

f - the File

Returns:

the String containing the file type description for f

See Also:

FileView.getTypeDescription(java.io.File)

getIcon

public Icon getIcon(File f)

Returns the icon for this file or type of file, depending on the system.

Parameters:

f - the File

Returns:

the Icon for this file, or type of file

See Also:

FileView.getIcon(java.io.File)

isTraversable

public boolean isTraversable(File f)

Returns true if the file (directory) can be visited. Returns false if the directory cannot be traversed.

Parameters:

f - the File

Returns:

true if the file/directory can be traversed, otherwise false

See Also:

FileView.isTraversable(java.io.File)

accept

public boolean accept(File f)

Returns true if the file should be displayed.

Parameters:

f - the File

Returns:

true if the file should be displayed, otherwise false

See Also:

FileFilter.accept(java.io.File)

setFileSystemView

public void setFileSystemView(FileSystemView fsv)

Sets the file system view that the JFileChooser uses for accessing and creating file system resources, such as finding the floppy drive and getting a list of root drives.

Parameters:

fsv - the new FileSystemView

See Also:

FileSystemView

getFileSystemView

public FileSystemView getFileSystemView()

Returns the file system view.

Returns:

the FileSystemView object

See Also:

setFileSystemView(javax.swing.filechooser.FileSystemView)

approveSelection

public void approveSelection()

Called by the UI when the user hits the Approve button (labeled "Open" or "Save", by default). This can also be called by the programmer. This method causes an action event to fire with the command string equal to APPROVE_SELECTION.

See Also:

APPROVE_SELECTION

cancelSelection

public void cancelSelection()

Called by the UI when the user chooses the Cancel button. This can also be called by the programmer. This method causes an action event to fire with the command string equal to CANCEL_SELECTION.

See Also:

CANCEL_SELECTION

addActionListener

public void addActionListener(ActionListener l)

Adds an ActionListener to the file chooser.

Parameters:

l - the listener to be added

See Also:

approveSelection(), cancelSelection()

removeActionListener

public void removeActionListener(ActionListener l)

Removes an ActionListener from the file chooser.

Parameters:

l - the listener to be removed

See Also:

addActionListener(java.awt.event.ActionListener)

getActionListeners

public ActionListener[] getActionListeners()

Returns an array of all the action listeners registered on this file chooser.

Returns:

all of this file chooser's ActionListeners or an empty array if no action listeners are currently registered

Since:

1.4

See Also:

addActionListener(java.awt.event.ActionListener), removeActionListener(java.awt.event.ActionListener)

fireActionPerformed

protected void fireActionPerformed(String command)

Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the command parameter.

See Also:

EventListenerList

updateUI

public void updateUI()

Resets the UI property to a value from the current look and feel.

Overrides:

updateUI in class JComponent

See Also:

JComponent.updateUI()

getUIClassID

public String getUIClassID()

Returns a string that specifies the name of the L&F class that renders this component.

Overrides:

getUIClassID in class JComponent

Returns:

the string "FileChooserUI"

See Also:

JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

getUI

public FileChooserUI getUI()

Gets the UI object which implements the L&F for this component.

Returns:

the FileChooserUI object that implements the FileChooserUI L&F

paramString

protected String paramString()

Returns a string representation of this JFileChooser. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.

Overrides:

paramString in class JComponent

Returns:

a string representation of this JFileChooser

getAccessibleContext

public AccessibleContext getAccessibleContext()

Gets the AccessibleContext associated with this JFileChooser. For file choosers, the AccessibleContext takes the form of an AccessibleJFileChooser. A new AccessibleJFileChooser instance is created if necessary.

Specified by:

getAccessibleContext in interface Accessible

Overrides:

getAccessibleContext in class JComponent

Returns:

an AccessibleJFileChooser that serves as the AccessibleContext of this JFileChooser