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javax.swing
Class JFrame
java.lang.Object
java.awt.Component
java.awt.Container
java.awt.Window
java.awt.Frame
javax.swing.JFrame
-
All Implemented Interfaces:
-
Accessible
,
ImageObserver
,
MenuContainer
,
RootPaneContainer
,
Serializable
,
WindowConstants
-
public class
JFrame
-
extends
Frame
-
implements
WindowConstants
,
Accessible
,
RootPaneContainer
An extended version of java.awt.Frame that adds support for the JFC/Swing component architecture. You can find task-oriented documentation about using JFrame in The Java Tutorial, in the section
How to Make Frames
.
The JFrame class is slightly incompatible with Frame. Like all other JFC/Swing top-level containers, a JFrame contains a JRootPane as its only child. The
content pane
provided by the root pane should, as a rule, contain all the non-menu components displayed by the JFrame. This is different from the AWT Frame case.
As a conveniance add and its variants, remove and setLayout have been overridden to forward to the contentPane as necessary. This means you can write:
For example, to add a child to an AWT frame you'd write:
frame.add(child);
And
However using JFrame you need to add
the child
will
to the JFrame's content pane instead:
frame.getContentPane().add(child);
The same is true for setting layout managers, removing components, listing children, and so on. All these methods should normally
be
added
sent
to the
contentPane.
content pane instead of the JFrame itself.
The content pane will always be non-null. Attempting to set it to null will cause the JFrame to throw an exception. The default content pane will have a BorderLayout manager set on it.
Refer to
RootPaneContainer
for details on adding, removing and setting the LayoutManager of a JFrame.
Unlike a Frame, a JFrame has some notion of how to respond when the user attempts to close the window. The default behavior is to simply hide the JFrame when the user closes the window. To change the default behavior, you invoke the method
setDefaultCloseOperation(int)
. To make the JFrame behave the same as a Frame instance, use setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE).
For more information on content panes and other features that root panes provide, see
Using Top-Level Containers
in The Java Tutorial.
In a multi-screen environment, you can create a JFrame on a different screen device. See
Frame
for more information.
For the keyboard keys used by this component in the standard Look and Feel (L&F) renditions, see the
JFrame key assignments
.
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans
TM
has been added to the java.beans package. Please see
XMLEncoder
.
-
See Also:
-
JRootPane
,
setDefaultCloseOperation(int)
,
WindowListener.windowClosing(java.awt.event.WindowEvent)
,
RootPaneContainer
Nested Class Summary
|
protected class |
JFrame.AccessibleJFrame
This class implements accessibility support for the JFrame class. |
Nested classes inherited from class java.awt.
Component
|
Component.AccessibleAWTComponent
,
Component.BltBufferStrategy
,
Component.FlipBufferStrategy
|
Field Summary
|
protected
AccessibleContext
|
accessibleContext
The accessible context property. |
static int |
EXIT_ON_CLOSE
The exit application default window close operation. |
protected
JRootPane
|
rootPane
The JRootPane instance that manages the contentPane and optional menuBar for this frame, as well as the glassPane. |
protected boolean |
rootPaneCheckingEnabled
If true then calls to add and setLayout will
cause an exception to
be
forwarded to the contentPane.
thrown.
|
Fields inherited from class java.awt.
Frame
|
CROSSHAIR_CURSOR
,
DEFAULT_CURSOR
,
E_RESIZE_CURSOR
,
HAND_CURSOR
,
ICONIFIED
,
MAXIMIZED_BOTH
,
MAXIMIZED_HORIZ
,
MAXIMIZED_VERT
,
MOVE_CURSOR
,
N_RESIZE_CURSOR
,
NE_RESIZE_CURSOR
,
NORMAL
,
NW_RESIZE_CURSOR
,
S_RESIZE_CURSOR
,
SE_RESIZE_CURSOR
,
SW_RESIZE_CURSOR
,
TEXT_CURSOR
,
W_RESIZE_CURSOR
,
WAIT_CURSOR
|
Fields inherited from interface java.awt.image.
ImageObserver
|
ABORT
,
ALLBITS
,
ERROR
,
FRAMEBITS
,
HEIGHT
,
PROPERTIES
,
SOMEBITS
,
WIDTH
|
Constructor Summary
|
JFrame
()
Constructs a new frame that is initially invisible. |
JFrame
(
GraphicsConfiguration
gc)
Creates a Frame in the specified GraphicsConfiguration of a screen device and a blank title. |
JFrame
(
String
title)
Creates a new, initially invisible Frame with the specified title. |
JFrame
(
String
title,
GraphicsConfiguration
gc)
Creates a JFrame with the specified title and the specified GraphicsConfiguration of a screen device. |
Methods inherited from class java.awt.
Frame
|
addNotify
,
finalize
,
getCursorType
,
getExtendedState
,
getFrames
,
getIconImage
,
getMaximizedBounds
,
getMenuBar
,
getState
,
getTitle
,
isResizable
,
isUndecorated
,
remove
,
removeNotify
,
setCursor
,
setExtendedState
,
setIconImage
,
setMaximizedBounds
,
setMenuBar
,
setResizable
,
setState
,
setTitle
,
setUndecorated
|
Methods inherited from class java.awt.
Window
|
addPropertyChangeListener
,
addPropertyChangeListener
,
addWindowFocusListener
,
addWindowListener
,
addWindowStateListener
,
applyResourceBundle
,
applyResourceBundle
,
createBufferStrategy
,
createBufferStrategy
,
dispose
,
getBufferStrategy
,
getFocusableWindowState
,
getFocusCycleRootAncestor
,
getFocusOwner
,
getFocusTraversalKeys
,
getGraphicsConfiguration
,
getInputContext
,
getListeners
,
getLocale
,
getMostRecentFocusOwner
,
getOwnedWindows
,
getOwner
,
getToolkit
,
getWarningString
,
getWindowFocusListeners
,
getWindowListeners
,
getWindowStateListeners
,
hide
,
isActive
,
isAlwaysOnTop
,
isFocusableWindow
,
isFocusCycleRoot
,
isFocused
,
isLocationByPlatform
,
isShowing
,
pack
,
postEvent
,
processEvent
,
processWindowFocusEvent
,
processWindowStateEvent
,
removeWindowFocusListener
,
removeWindowListener
,
removeWindowStateListener
,
setAlwaysOnTop
,
setBounds
,
setCursor
,
setFocusableWindowState
,
setFocusCycleRoot
,
setLocationByPlatform
,
setLocationRelativeTo
,
show
,
toBack
,
toFront
|
Methods inherited from class java.awt.
Container
|
add
,
add
,
add
,
add
,
add
,
addContainerListener
,
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
,
paint
,
paintComponents
,
preferredSize
,
print
,
printComponents
,
processContainerEvent
,
remove
,
removeAll
,
removeContainerListener
,
setComponentZOrder
,
setFocusTraversalKeys
,
setFocusTraversalPolicy
,
setFocusTraversalPolicyProvider
,
setFont
,
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
,
contains
,
createImage
,
createImage
,
createVolatileImage
,
createVolatileImage
,
disable
,
disableEvents
,
dispatchEvent
,
enable
,
enable
,
enableEvents
,
enableInputMethods
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
getBackground
,
getBounds
,
getBounds
,
getColorModel
,
getComponentListeners
,
getComponentOrientation
,
getCursor
,
getDropTarget
,
getFocusListeners
,
getFocusTraversalKeysEnabled
,
getFont
,
getFontMetrics
,
getForeground
,
getGraphics
,
getHeight
,
getHierarchyBoundsListeners
,
getHierarchyListeners
,
getIgnoreRepaint
,
getInputMethodListeners
,
getInputMethodRequests
,
getKeyListeners
,
getLocation
,
getLocation
,
getLocationOnScreen
,
getMouseListeners
,
getMouseMotionListeners
,
getMousePosition
,
getMouseWheelListeners
,
getName
,
getParent
,
getPeer
,
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
,
isOpaque
,
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
,
removeComponentListener
,
removeFocusListener
,
removeHierarchyBoundsListener
,
removeHierarchyListener
,
removeInputMethodListener
,
removeKeyListener
,
removeMouseListener
,
removeMouseMotionListener
,
removeMouseWheelListener
,
removePropertyChangeListener
,
removePropertyChangeListener
,
repaint
,
repaint
,
repaint
,
repaint
,
requestFocus
,
requestFocus
,
requestFocusInWindow
,
requestFocusInWindow
,
reshape
,
resize
,
resize
,
setBackground
,
setBounds
,
setBounds
,
setComponentOrientation
,
setDropTarget
,
setEnabled
,
setFocusable
,
setFocusTraversalKeysEnabled
,
setForeground
,
setIgnoreRepaint
,
setLocale
,
setLocation
,
setLocation
,
setMaximumSize
,
setMinimumSize
,
setName
,
setPreferredSize
,
setSize
,
setSize
,
setVisible
,
show
,
size
,
toString
,
transferFocus
,
transferFocusUpCycle
|
Methods inherited from interface java.awt.
MenuContainer
|
getFont
,
postEvent
|
EXIT_ON_CLOSE
public static final int EXIT_ON_CLOSE
-
The exit application default window close operation. If a window has this set as the close operation and is closed in an applet, a SecurityException may be thrown. It is recommended you only use this in an application.
-
Since:
-
1.3
-
See Also:
-
Constant Field Values
rootPane
protected JRootPane rootPane
-
The JRootPane instance that manages the contentPane and optional menuBar for this frame, as well as the glassPane.
-
See Also:
-
JRootPane
,
RootPaneContainer
rootPaneCheckingEnabled
protected boolean rootPaneCheckingEnabled
-
If true then calls to add and setLayout will be forwarded to the contentPane. This is initially false, but is set to true when the JFrame is constructed.
If true then calls to add and setLayout will cause an exception to be thrown. The default is false.
-
See Also:
-
isRootPaneCheckingEnabled()
,
setRootPaneCheckingEnabled(boolean)
,
RootPaneContainer
accessibleContext
protected AccessibleContext accessibleContext
-
The accessible context property.
JFrame
public JFrame()
throws HeadlessException
-
Constructs a new frame that is initially invisible.
This constructor sets the component's locale property to the value returned by JComponent.getDefaultLocale.
-
Throws:
-
HeadlessException
- if GraphicsEnvironment.isHeadless() returns true.
-
See Also:
-
GraphicsEnvironment.isHeadless()
,
Component.setSize(int, int)
,
Component.setVisible(boolean)
,
JComponent.getDefaultLocale()
JFrame
public JFrame(GraphicsConfiguration gc)
-
Creates a Frame in the specified GraphicsConfiguration of a screen device and a blank title.
This constructor sets the component's locale property to the value returned by JComponent.getDefaultLocale.
-
Parameters:
-
gc - the GraphicsConfiguration that is used to construct the new Frame; if gc is null, the system default GraphicsConfiguration is assumed
-
Throws:
-
IllegalArgumentException
- if gc is not from a screen device. This exception is always thrown when GraphicsEnvironment.isHeadless() returns true.
-
Since:
-
1.3
-
See Also:
-
GraphicsEnvironment.isHeadless()
,
JComponent.getDefaultLocale()
JFrame
public JFrame(String title)
throws HeadlessException
-
Creates a new, initially invisible Frame with the specified title.
This constructor sets the component's locale property to the value returned by JComponent.getDefaultLocale.
-
Parameters:
-
title - the title for the frame
-
Throws:
-
HeadlessException
- if GraphicsEnvironment.isHeadless() returns true.
-
See Also:
-
GraphicsEnvironment.isHeadless()
,
Component.setSize(int, int)
,
Component.setVisible(boolean)
,
JComponent.getDefaultLocale()
JFrame
public JFrame(String title,
GraphicsConfiguration gc)
-
Creates a JFrame with the specified title and the specified GraphicsConfiguration of a screen device.
This constructor sets the component's locale property to the value returned by JComponent.getDefaultLocale.
-
Parameters:
-
title - the title to be displayed in the frame's border. A null value is treated as an empty string, "".
-
gc - the GraphicsConfiguration that is used to construct the new JFrame with; if gc is null, the system default GraphicsConfiguration is assumed
-
Throws:
-
IllegalArgumentException
- if gc is not from a screen device. This exception is always thrown when GraphicsEnvironment.isHeadless() returns true.
-
Since:
-
1.3
-
See Also:
-
GraphicsEnvironment.isHeadless()
,
JComponent.getDefaultLocale()
frameInit
protected void frameInit()
-
Called by the constructors to init the JFrame properly.
-
-
createRootPane
protected JRootPane createRootPane()
-
Called by the constructor methods to create the default rootPane.
-
-
processWindowEvent
protected void processWindowEvent(WindowEvent e)
-
Processes window events occurring on this component. Hides the window or disposes of it, as specified by the setting of the defaultCloseOperation property.
-
-
Overrides:
-
processWindowEvent
in class
Window
-
-
Parameters:
-
e - the window event
-
See Also:
-
setDefaultCloseOperation(int)
,
Window.processWindowEvent(java.awt.event.WindowEvent)
setDefaultCloseOperation
public void setDefaultCloseOperation(int operation)
-
Sets the operation that will happen by default when the user initiates a "close" on this frame. You must specify one of the following choices:
-
DO_NOTHING_ON_CLOSE (defined in WindowConstants): Don't do anything; require the program to handle the operation in the windowClosing method of a registered WindowListener object.
-
HIDE_ON_CLOSE (defined in WindowConstants): Automatically hide the frame after invoking any registered WindowListener objects.
-
DISPOSE_ON_CLOSE (defined in WindowConstants): Automatically hide and dispose the frame after invoking any registered WindowListener objects.
-
EXIT_ON_CLOSE (defined in JFrame): Exit the application using the System exit method. Use this only in applications.
The value is set to HIDE_ON_CLOSE by default.
Note
: When the last displayable window within the Java virtual machine (VM) is disposed of, the VM may terminate. See
AWT Threading Issues
for more information.
-
-
-
Parameters:
-
operation - the operation which should be performed when the user closes the frame
-
Throws:
-
IllegalArgumentException
- if defaultCloseOperation value isn't one of the above valid values
-
SecurityException
- if EXIT_ON_CLOSE has been specified and the SecurityManager will not allow the caller to invoke System.exit
-
See Also:
-
Window.addWindowListener(java.awt.event.WindowListener)
,
getDefaultCloseOperation()
,
WindowConstants
,
Runtime.exit(int)
getDefaultCloseOperation
public int getDefaultCloseOperation()
-
Returns the operation that occurs when the user initiates a "close" on this frame.
-
-
-
Returns:
-
an integer indicating the window-close operation
-
See Also:
-
setDefaultCloseOperation(int)
update
public void update(Graphics g)
-
Just calls paint(g). This method was overridden to prevent an unnecessary call to clear the background.
-
-
Overrides:
-
update
in class
Container
-
-
Parameters:
-
g - the Graphics context in which to paint
-
See Also:
-
Component.update(Graphics)
setJMenuBar
public void setJMenuBar(JMenuBar menubar)
-
Sets the menubar for this frame.
-
-
-
Parameters:
-
menubar - the menubar being placed in the frame
-
See Also:
-
getJMenuBar()
getJMenuBar
public JMenuBar getJMenuBar()
-
Returns the menubar set on this frame.
-
-
-
Returns:
-
the menubar for this frame
-
See Also:
-
setJMenuBar(javax.swing.JMenuBar)
isRootPaneCheckingEnabled
protected boolean isRootPaneCheckingEnabled()
-
Returns whether calls to add and setLayout
are forwarded
cause an exception
to
the contentPane.
be thrown.
-
-
-
Returns:
-
true if add and setLayout are
fowarded;
checked;
false otherwise -
See Also:
-
addImpl(java.awt.Component, java.lang.Object, int)
,
setLayout(java.awt.LayoutManager)
,
setRootPaneCheckingEnabled(boolean)
,
RootPaneContainer
setRootPaneCheckingEnabled
protected void setRootPaneCheckingEnabled(boolean enabled)
-
Sets
Determines
whether calls to add and setLayout
are forwarded
will cause an exception
to
the contentPane.
be thrown.
-
-
-
Parameters:
-
enabled - true if add and setLayout are forwarded, false if they should operate directly on the JFrame.
enabled - true if checking is to be enabled, which causes the exceptions to be thrown
-
See Also:
-
addImpl(java.awt.Component, java.lang.Object, int)
,
setLayout(java.awt.LayoutManager)
,
isRootPaneCheckingEnabled()
,
RootPaneContainer
addImpl
protected void addImpl(Component comp,
Object constraints,
int index)
-
Adds the specified child Component. This method is overridden to conditionally forwad calls to the contentPane. By default, children are added to the contentPane instead of the frame, refer to
RootPaneContainer
for details.
By default, children may not be added directly to this component, they must be added to its contentPane instead. For example:
thisComponent.getContentPane().add(child)
An attempt to add to directly to this component will cause an runtime exception to be thrown. Subclasses can disable this behavior.
-
-
Overrides:
-
addImpl
in class
Container
-
-
Parameters:
-
comp - the component to be enhanced
-
constraints - the constraints to be respected
-
index - the index
-
Throws:
-
IllegalArgumentException
Error
- if index is invalid
-
IllegalArgumentException
- if adding the container's parent to itself
-
IllegalArgumentException
- if adding a window to a container
- if called with rootPaneChecking true
-
See Also:
-
setRootPaneCheckingEnabled(boolean)
,
RootPaneContainer
remove
public void remove(Component comp)
-
Removes the specified component from the container. If comp is not the rootPane, this will forward the call to the contentPane. This will do nothing if comp is not a child of the JFrame or contentPane.
Removes the specified component from this container.
-
-
Overrides:
-
remove
in class
Container
-
-
Parameters:
-
comp - the component to be removed
-
Throws:
-
NullPointerException
- if comp is null
-
See Also:
-
Container.add(java.awt.Component)
,
RootPaneContainer
setLayout
public void setLayout(LayoutManager manager)
-
Sets the LayoutManager. Overridden to conditionally forward the call to the contentPane. Refer to
RootPaneContainer
for more information.
By default the layout of this component may not be set, the layout of its contentPane should be set instead. For example:
thisComponent.getContentPane().setLayout(new GridLayout(1, 2))
An attempt to set the layout of this component will cause an runtime exception to be thrown. Subclasses can disable this behavior.
-
-
Overrides:
-
setLayout
in class
Container
-
-
Parameters:
-
manager - the LayoutManager
-
Throws:
-
Error
- if called with rootPaneChecking true
-
See Also:
-
setRootPaneCheckingEnabled(boolean)
,
RootPaneContainer
getRootPane
public JRootPane getRootPane()
-
Returns the rootPane object for this frame.
-
-
Specified by:
-
getRootPane
in interface
RootPaneContainer
-
-
Returns:
-
the rootPane property
-
See Also:
-
setRootPane(javax.swing.JRootPane)
,
RootPaneContainer.getRootPane()
setRootPane
protected void setRootPane(JRootPane root)
-
Sets the rootPane property. This method is called by the constructor.
-
-
-
Parameters:
-
root - the rootPane object for this frame
-
See Also:
-
getRootPane()
setIconImage
public void setIconImage ( Image image)
-
Description copied from class:
Frame
-
Sets the image to be displayed in the minimized icon for this frame. Not all platforms support the concept of minimizing a window.
-
-
Overrides:
-
setIconImage
in class
Frame
-
-
Parameters:
-
image - the icon image to be displayed. If this parameter is null then the icon image is set to the default image, which may vary with platform.
-
See Also:
-
Frame.getIconImage()
getContentPane
public Container getContentPane()
-
Returns the contentPane object for this frame.
-
-
Specified by:
-
getContentPane
in interface
RootPaneContainer
-
-
Returns:
-
the contentPane property
-
See Also:
-
setContentPane(java.awt.Container)
,
RootPaneContainer.getContentPane()
setContentPane
public void setContentPane(Container contentPane)
-
Sets the contentPane property. This method is called by the constructor.
Swing's painting architecture requires an opaque JComponent in the containment hiearchy. This is typically provided by the content pane. If you replace the content pane it is recommended you replace it with an opaque JComponent.
-
-
Specified by:
-
setContentPane
in interface
RootPaneContainer
-
-
Parameters:
-
contentPane - the contentPane object for this frame
-
Throws:
-
IllegalComponentStateException
- (a runtime exception) if the content pane parameter is null
-
See Also:
-
getContentPane()
,
RootPaneContainer.setContentPane(java.awt.Container)
,
JRootPane
getLayeredPane
public JLayeredPane getLayeredPane()
-
Returns the layeredPane object for this frame.
-
-
Specified by:
-
getLayeredPane
in interface
RootPaneContainer
-
-
Returns:
-
the layeredPane property
-
See Also:
-
setLayeredPane(javax.swing.JLayeredPane)
,
RootPaneContainer.getLayeredPane()
setLayeredPane
public void setLayeredPane(JLayeredPane layeredPane)
-
Sets the layeredPane property. This method is called by the constructor.
-
-
Specified by:
-
setLayeredPane
in interface
RootPaneContainer
-
-
Parameters:
-
layeredPane - the layeredPane object for this frame
-
Throws:
-
IllegalComponentStateException
- (a runtime exception) if the layered pane parameter is null
-
See Also:
-
getLayeredPane()
,
RootPaneContainer.setLayeredPane(javax.swing.JLayeredPane)
getGlassPane
public Component getGlassPane()
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Returns the glassPane object for this frame.
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Specified by:
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getGlassPane
in interface
RootPaneContainer
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Returns:
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the glassPane property
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See Also:
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setGlassPane(java.awt.Component)
,
RootPaneContainer.getGlassPane()
setGlassPane
public void setGlassPane(Component glassPane)
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Sets the glassPane property. This method is called by the constructor.
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Specified by:
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setGlassPane
in interface
RootPaneContainer
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Parameters:
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glassPane - the glassPane object for this frame
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See Also:
-
getGlassPane()
,
RootPaneContainer.setGlassPane(java.awt.Component)
setDefaultLookAndFeelDecorated
public static void setDefaultLookAndFeelDecorated(boolean defaultLookAndFeelDecorated)
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Provides a hint as to whether or not newly created JFrames should have their Window decorations (such as borders, widgets to close the window, title...) provided by the current look and feel. If defaultLookAndFeelDecorated is true, the current LookAndFeel supports providing window decorations, and the current window manager supports undecorated windows, then newly created JFrames will have their Window decorations provided by the current LookAndFeel. Otherwise, newly created JFrames will have their Window decorations provided by the current window manager.
You can get the same effect on a single JFrame by doing the following:
JFrame frame = new JFrame();
frame.setUndecorated(true);
frame.getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
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Parameters:
-
defaultLookAndFeelDecorated - A hint as to whether or not current look and feel should provide window decorations
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Since:
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1.4
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See Also:
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LookAndFeel.getSupportsWindowDecorations()
isDefaultLookAndFeelDecorated
public static boolean isDefaultLookAndFeelDecorated()
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Returns true if newly created JFrames should have their Window decorations provided by the current look and feel. This is only a hint, as certain look and feels may not support this feature.
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Returns:
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true if look and feel should provide Window decorations.
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Since:
-
1.4
paramString
protected String paramString()
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Returns a string representation of this JFrame. 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.
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Overrides:
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paramString
in class
Frame
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Returns:
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a string representation of this JFrame
getAccessibleContext
public AccessibleContext getAccessibleContext()
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Gets the AccessibleContext associated with this JFrame. For JFrames, the AccessibleContext takes the form of an AccessibleJFrame. A new AccessibleJFrame instance is created if necessary.
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Specified by:
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getAccessibleContext
in interface
Accessible
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Overrides:
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getAccessibleContext
in class
Frame
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Returns:
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an AccessibleJFrame that serves as the AccessibleContext of this JFrame