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Showing content from https://docs.oracle.com/en/java/javase/19/docs/api/java.desktop/java/awt/FileDialog.html below:

FileDialog (Java SE 19 & JDK 19)

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, Accessible

The

class displays a dialog window from which the user can select a file.

Since it is a modal dialog, when the application calls its show method to display the dialog, it blocks the rest of the application until the user has chosen a file.

Since:

1.0

See Also:

• Window.show()
• Serialized Form

• Nested Class Summary
• Field Summary

  Fields

  static final int

  This constant value indicates that the purpose of the file dialog window is to locate a file from which to read.

  static final int

  This constant value indicates that the purpose of the file dialog window is to locate a file to which to write.

• Constructor Summary

  Constructors

  Creates a file dialog for loading a file.

  Creates a file dialog window with the specified title for loading a file.

  Creates a file dialog window with the specified title for loading or saving a file.

  Creates a file dialog for loading a file.

  Creates a file dialog window with the specified title for loading a file.

  Creates a file dialog window with the specified title for loading or saving a file.

• Method Summary

  void

  Creates the file dialog's peer.

  Gets the directory of this file dialog.

  Gets the selected file of this file dialog.

  Determines this file dialog's filename filter.

  Returns files that the user selects.

  int

  Indicates whether this file dialog box is for loading from a file or for saving to a file.

  boolean

  Returns whether the file dialog allows the multiple file selection.

  Returns a string representing the state of this FileDialog window.

  void

  Sets the directory of this file dialog window to be the specified directory.

  void

  Sets the selected file for this file dialog window to be the specified file.

  void

  Sets the filename filter for this file dialog window to the specified filter.

  void

  Sets the mode of the file dialog.

  void

  Enables or disables multiple file selection for the file dialog.

  void

  Sets the title of the Dialog.

  Methods declared in class java.awt.DialoggetAccessibleContext, getModalityType, getTitle, hide, isModal, isResizable, isUndecorated, setModal, setModalityType, setResizable, setUndecorated, setVisible, show, toBack Methods declared in class java.awt.WindowaddPropertyChangeListener, addPropertyChangeListener, addWindowFocusListener, addWindowListener, addWindowStateListener, applyResourceBundle, applyResourceBundle, createBufferStrategy, createBufferStrategy, dispose, getBackground, getBufferStrategy, getFocusableWindowState, getFocusCycleRootAncestor, getFocusOwner, getFocusTraversalKeys, getIconImages, getInputContext, getListeners, getLocale, getModalExclusionType, getMostRecentFocusOwner, getOpacity, getOwnedWindows, getOwner, getOwnerlessWindows, getShape, getToolkit, getType, getWarningString, getWindowFocusListeners, getWindowListeners, getWindows, getWindowStateListeners, isActive, isAlwaysOnTop, isAlwaysOnTopSupported, isAutoRequestFocus, isFocusableWindow, isFocusCycleRoot, isFocused, isLocationByPlatform, isOpaque, isShowing, isValidateRoot, pack, paint, postEvent, processEvent, processWindowEvent, processWindowFocusEvent, processWindowStateEvent, removeWindowFocusListener, removeWindowListener, removeWindowStateListener, reshape, setAlwaysOnTop, setAutoRequestFocus, setBackground, setBounds, setBounds, setCursor, setFocusableWindowState, setFocusCycleRoot, setIconImage, setIconImages, setLocation, setLocation, setLocationByPlatform, setLocationRelativeTo, setMinimumSize, setModalExclusionType, setOpacity, setShape, setSize, setSize, setType, toFront Methods declared in class java.awt.Containeradd, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalPolicy, getInsets, getLayout, getMaximumSize, getMinimumSize, getMousePosition, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, print, printComponents, processContainerEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setComponentZOrder, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, transferFocusDownCycle, update, validate, validateTree Methods declared in class java.awt.Componentaction, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, requestFocusInWindow, resize, resize, revalidate, setComponentOrientation, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setMaximumSize, setMixingCutoutShape, setName, setPreferredSize, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

• Field Details
  • LOAD

    public static final int LOAD

    This constant value indicates that the purpose of the file dialog window is to locate a file from which to read.

    See Also:

    • Constant Field Values

  • SAVE

    public static final int SAVE

    This constant value indicates that the purpose of the file dialog window is to locate a file to which to write.

    See Also:

    • Constant Field Values

• Constructor Details
  • FileDialog public FileDialog(Frame parent)

    Creates a file dialog for loading a file. The title of the file dialog is initially empty. This is a convenience method for

    FileDialog(parent, "", LOAD)

    .

    Note: Some platforms may not support showing the user-specified title in a file dialog. In this situation, either no title will be displayed in the file dialog's title bar or, on some systems, the file dialog's title bar will not be displayed.

    Parameters:

    parent - the owner of the dialog

    Since:

    1.1

  • FileDialog

    Creates a file dialog window with the specified title for loading a file. The files shown are those in the current directory. This is a convenience method for

    FileDialog(parent, title, LOAD)

    .

    Note: Some platforms may not support showing the user-specified title in a file dialog. In this situation, either no title will be displayed in the file dialog's title bar or, on some systems, the file dialog's title bar will not be displayed.

    Parameters:

    parent - the owner of the dialog

    title - the title of the dialog

  • FileDialog public FileDialog(Frame parent, String title, int mode)

    Creates a file dialog window with the specified title for loading or saving a file.

    If the value of mode is LOAD, then the file dialog is finding a file to read, and the files shown are those in the current directory. If the value of mode is SAVE, the file dialog is finding a place to write a file.

    Note: Some platforms may not support showing the user-specified title in a file dialog. In this situation, either no title will be displayed in the file dialog's title bar or, on some systems, the file dialog's title bar will not be displayed.

    Parameters:

    parent - the owner of the dialog

    title - the title of the dialog

    mode - the mode of the dialog; either FileDialog.LOAD or FileDialog.SAVE

    Throws:

    IllegalArgumentException - if an illegal file dialog mode is supplied

    See Also:

    • LOAD
    • SAVE

  • FileDialog public FileDialog(Dialog parent)

    Creates a file dialog for loading a file. The title of the file dialog is initially empty. This is a convenience method for

    FileDialog(parent, "", LOAD)

    .

    Note: Some platforms may not support showing the user-specified title in a file dialog. In this situation, either no title will be displayed in the file dialog's title bar or, on some systems, the file dialog's title bar will not be displayed.

    Parameters:

    parent - the owner of the dialog

    Throws:

    IllegalArgumentException - if the parent's GraphicsConfiguration is not from a screen device;

    IllegalArgumentException - if parent is null; this exception is always thrown when GraphicsEnvironment.isHeadless returns true

    Since:

    1.5

    See Also:

    • GraphicsEnvironment.isHeadless()

  • FileDialog

    Creates a file dialog window with the specified title for loading a file. The files shown are those in the current directory. This is a convenience method for

    FileDialog(parent, title, LOAD)

    .

    Note: Some platforms may not support showing the user-specified title in a file dialog. In this situation, either no title will be displayed in the file dialog's title bar or, on some systems, the file dialog's title bar will not be displayed.

    Parameters:

    parent - the owner of the dialog

    title - the title of the dialog; a null value will be accepted without causing a NullPointerException to be thrown

    Throws:

    IllegalArgumentException - if the parent's GraphicsConfiguration is not from a screen device;

    IllegalArgumentException - if parent is null; this exception is always thrown when GraphicsEnvironment.isHeadless returns true

    Since:

    1.5

    See Also:

    • GraphicsEnvironment.isHeadless()

  • FileDialog

    Creates a file dialog window with the specified title for loading or saving a file.

    If the value of mode is LOAD, then the file dialog is finding a file to read, and the files shown are those in the current directory. If the value of mode is SAVE, the file dialog is finding a place to write a file.

    Note: Some platforms may not support showing the user-specified title in a file dialog. In this situation, either no title will be displayed in the file dialog's title bar or, on some systems, the file dialog's title bar will not be displayed.

    Parameters:

    parent - the owner of the dialog

    title - the title of the dialog; a null value will be accepted without causing a NullPointerException to be thrown

    mode - the mode of the dialog; either FileDialog.LOAD or FileDialog.SAVE

    Throws:

    IllegalArgumentException - if an illegal file dialog mode is supplied;

    IllegalArgumentException - if the parent's GraphicsConfiguration is not from a screen device;

    IllegalArgumentException - if parent is null; this exception is always thrown when GraphicsEnvironment.isHeadless returns true

    Since:

    1.5

    See Also:

    • GraphicsEnvironment.isHeadless()
    • LOAD
    • SAVE

• Method Details
  • setTitle public void setTitle(String title)

    Note: Some platforms may not support showing the user-specified title in a file dialog. In this situation, either no title will be displayed in the file dialog's title bar or, on some systems, the file dialog's title bar will not be displayed.

    Overrides:

    setTitle in class Dialog

    Parameters:

    title - the title displayed in the dialog's border; a null value results in an empty title

    See Also:

    • Dialog.getTitle()

  • addNotify

    public void addNotify()

    Creates the file dialog's peer. The peer allows us to change the look of the file dialog without changing its functionality.

    Overrides:

    addNotify in class Dialog

    See Also:

    • Component.isDisplayable()
    • Container.removeNotify()

  • getMode

    public int getMode()

    Indicates whether this file dialog box is for loading from a file or for saving to a file.

    Returns:

    the mode of this file dialog window, either FileDialog.LOAD or FileDialog.SAVE

    See Also:

    • LOAD
    • SAVE
    • setMode(int)

  • setMode

    public void setMode(int mode)

    Sets the mode of the file dialog. If mode is not a legal value, an exception will be thrown and mode will not be set.

    Parameters:

    mode - the mode for this file dialog, either FileDialog.LOAD or FileDialog.SAVE

    Throws:

    IllegalArgumentException - if an illegal file dialog mode is supplied

    Since:

    1.1

    See Also:

    • LOAD
    • SAVE
    • getMode()

  • getDirectory

    Gets the directory of this file dialog.

    Returns:

    the (potentially null or invalid) directory of this FileDialog

    See Also:

    • setDirectory(java.lang.String)

  • setDirectory public void setDirectory(String dir)

    Sets the directory of this file dialog window to be the specified directory. Specifying a

    null

    or an invalid directory implies an implementation-defined default. This default will not be realized, however, until the user has selected a file. Until this point,

    getDirectory()

    will return the value passed into this method.

    Specifying "" as the directory is exactly equivalent to specifying null as the directory.

    Parameters:

    dir - the specified directory

    See Also:

    • getDirectory()

  • getFile

    Gets the selected file of this file dialog. If the user selected CANCEL, the returned file is null.

    Returns:

    the currently selected file of this file dialog window, or null if none is selected

    See Also:

    • setFile(java.lang.String)

  • getFiles public File[] getFiles

    ()

    If the user cancels the file dialog, then the method returns an empty array.

    Returns:

    files that the user selects or an empty array if the user cancels the file dialog.

    Since:

    1.7

    See Also:

    • setFile(String)
    • getFile()

  • setFile public void setFile(String file)

    Sets the selected file for this file dialog window to be the specified file. This file becomes the default file if it is set before the file dialog window is first shown.

    When the dialog is shown, the specified file is selected. The kind of selection depends on the file existence, the dialog type, and the native platform. E.g., the file could be highlighted in the file list, or a file name editbox could be populated with the file name.

    This method accepts either a full file path, or a file name with an extension if used together with the setDirectory method.

    Specifying "" as the file is exactly equivalent to specifying null as the file.

    Parameters:

    file - the file being set

    See Also:

    • getFile()
    • getFiles()

  • setMultipleMode

    public void setMultipleMode(boolean enable)

    Enables or disables multiple file selection for the file dialog.

    Parameters:

    enable - if true, multiple file selection is enabled; false - disabled.

    Since:

    1.7

    See Also:

    • isMultipleMode()

  • isMultipleMode

    public boolean isMultipleMode()

    Returns whether the file dialog allows the multiple file selection.

    Returns:

    true if the file dialog allows the multiple file selection; false otherwise.

    Since:

    1.7

    See Also:

    • setMultipleMode(boolean)

  • getFilenameFilter

    Determines this file dialog's filename filter. A filename filter allows the user to specify which files appear in the file dialog window. Filename filters do not function in Sun's reference implementation for Microsoft Windows.

    Returns:

    this file dialog's filename filter

    See Also:

    • FilenameFilter
    • setFilenameFilter(java.io.FilenameFilter)

  • setFilenameFilter

    Sets the filename filter for this file dialog window to the specified filter. Filename filters do not function in Sun's reference implementation for Microsoft Windows.

    Parameters:

    filter - the specified filter

    See Also:

    • FilenameFilter
    • getFilenameFilter()

  • paramString protected String paramString

    ()

    Returns a string representing the state of this FileDialog window. 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 Dialog

    Returns:

    the parameter string of this file dialog window

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