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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:
-
ImageObserver
,
MenuContainer
,
Serializable
,
Accessible
,
RootPaneContainer
,
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:
frame.add(child);
And the child will be added to the contentPane. 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.
Warning: Swing is not thread safe. For more information see
Swing's Threading Policy
.
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. |
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
|
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
,
getCursorType
,
getExtendedState
,
getFrames
,
getIconImage
,
getMaximizedBounds
,
getMenuBar
,
getState
,
getTitle
,
isResizable
,
isUndecorated
,
remove
,
removeNotify
,
setCursor
,
setExtendedState
,
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
,
getIconImages
,
getInputContext
,
getListeners
,
getLocale
,
getModalExclusionType
,
getMostRecentFocusOwner
,
getOwnedWindows
,
getOwner
,
getOwnerlessWindows
,
getToolkit
,
getWarningString
,
getWindowFocusListeners
,
getWindowListeners
,
getWindows
,
getWindowStateListeners
,
hide
,
isActive
,
isAlwaysOnTop
,
isAlwaysOnTopSupported
,
isFocusableWindow
,
isFocusCycleRoot
,
isFocused
,
isLocationByPlatform
,
isShowing
,
pack
,
postEvent
,
processEvent
,
processWindowFocusEvent
,
processWindowStateEvent
,
removeWindowFocusListener
,
removeWindowListener
,
removeWindowStateListener
,
reshape
,
setAlwaysOnTop
,
setBounds
,
setBounds
,
setCursor
,
setFocusableWindowState
,
setFocusCycleRoot
,
setIconImages
,
setLocationByPlatform
,
setLocationRelativeTo
,
setMinimumSize
,
setModalExclusionType
,
setSize
,
setSize
,
setVisible
,
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
,
getBaseline
,
getBaselineResizeBehavior
,
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
,
requestFocus
,
requestFocus
,
requestFocusInWindow
,
requestFocusInWindow
,
resize
,
resize
,
setBackground
,
setComponentOrientation
,
setDropTarget
,
setEnabled
,
setFocusable
,
setFocusTraversalKeysEnabled
,
setForeground
,
setIgnoreRepaint
,
setLocale
,
setLocation
,
setLocation
,
setMaximumSize
,
setName
,
setPreferredSize
,
show
,
size
,
toString
,
transferFocus
,
transferFocusUpCycle
|
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.
-
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. Changes to the value of this property cause the firing of a property change event, with property name "defaultCloseOperation".
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)
setTransferHandler
public void setTransferHandler(TransferHandler newHandler)
-
Sets the transferHandler property, which is a mechanism to support transfer of data into this component. Use null if the component does not support data transfer operations.
If the system property suppressSwingDropSupport is false (the default) and the current drop target on this component is either null or not a user-set drop target, this method will change the drop target as follows: If newHandler is null it will clear the drop target. If not null it will install a new DropTarget.
Note: When used with JFrame, TransferHandler only provides data import capability, as the data export related methods are currently typed to JComponent.
Please see
How to Use Drag and Drop and Data Transfer
, a section in The Java Tutorial, for more information.
-
-
-
Parameters:
-
newHandler - the new TransferHandler
-
Since:
-
1.6
-
See Also:
-
TransferHandler
,
getTransferHandler()
,
Component.setDropTarget(java.awt.dnd.DropTarget)
getTransferHandler
public TransferHandler getTransferHandler()
-
Gets the transferHandler property.
-
-
-
Returns:
-
the value of the transferHandler property
-
Since:
-
1.6
-
See Also:
-
TransferHandler
,
setTransferHandler(javax.swing.TransferHandler)
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 to the contentPane.
-
-
-
Returns:
-
true if add and setLayout are fowarded; 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 whether calls to add and setLayout are forwarded to the contentPane.
-
-
-
Parameters:
-
enabled - true if add and setLayout are forwarded, false if they should operate directly on the JFrame.
-
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 forward calls to the contentPane. By default, children are added to the contentPane instead of the frame, refer to
RootPaneContainer
for details.
-
-
Overrides:
-
addImpl
in class
Container
-
-
Parameters:
-
comp - the component to be enhanced
-
constraints - the constraints to be respected
-
index - the index
-
Throws:
-
IllegalArgumentException
- if index is invalid
-
IllegalArgumentException
- if adding the container's parent to itself
-
IllegalArgumentException
- if adding a window to a container
-
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.
-
-
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.
-
-
Overrides:
-
setLayout
in class
Container
-
-
Parameters:
-
manager - the LayoutManager
-
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)
-
Sets the image to be displayed as the icon for this window.
This method can be used instead of
setIconImages()
Description copied from class:
Frame
to specify a single image as a window's icon.
-
Sets the image to be displayed in the minimized icon for this frame. Not all platforms support the concept of minimizing a window.
The following statement:
setIconImage(image);
is equivalent to:
ArrayList
imageList = new ArrayList
();
imageList.add(image);
setIconImages(imageList);
Note : Native windowing systems may use different images of differing dimensions to represent a window, depending on the context (e.g. window decoration, window list, taskbar, etc.). They could also use just a single image for all contexts or no image at all.
-
-
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:
-
Window.setIconImages(java.util.List extends java.awt.Image>
)
Frame.getIconImage()
,
Window.getIconImages()
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()
-
Returns the glassPane object for this frame.
-
-
Specified by:
-
getGlassPane
in interface
RootPaneContainer
-
-
Returns:
-
the glassPane property
-
See Also:
-
setGlassPane(java.awt.Component)
,
RootPaneContainer.getGlassPane()
setGlassPane
public void setGlassPane(Component glassPane)
-
Sets the glassPane property. This method is called by the constructor.
-
-
Specified by:
-
setGlassPane
in interface
RootPaneContainer
-
-
Parameters:
-
glassPane - the glassPane object for this frame
-
See Also:
-
getGlassPane()
,
RootPaneContainer.setGlassPane(java.awt.Component)
getGraphics
public
Graphics
getGraphics
()
-
Creates a graphics context for this component. This method will return null if this component is currently not displayable.
-
-
Overrides:
-
getGraphics
in class
Component
-
-
Returns:
-
a graphics context for this component, or null if it has none
-
Since:
-
1.6
-
See Also:
-
Component.paint(java.awt.Graphics)
repaint
public void repaint(long time,
int x,
int y,
int width,
int height)
-
Repaints the specified rectangle of this component within time milliseconds. Refer to RepaintManager for details on how the repaint is handled.
-
-
Overrides:
-
repaint
in class
Component
-
-
Parameters:
-
time - maximum time in milliseconds before update
-
x - the
x
coordinate
-
y - the
y
coordinate
-
width - the width
-
height - the height
-
Since:
-
1.6
-
See Also:
-
RepaintManager
setDefaultLookAndFeelDecorated
public static void setDefaultLookAndFeelDecorated(boolean defaultLookAndFeelDecorated)
-
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);
-
-
-
Parameters:
-
defaultLookAndFeelDecorated - A hint as to whether or not current look and feel should provide window decorations
-
Since:
-
1.4
-
See Also:
-
LookAndFeel.getSupportsWindowDecorations()
isDefaultLookAndFeelDecorated
public static boolean isDefaultLookAndFeelDecorated()
-
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.
-
-
-
Returns:
-
true if look and feel should provide Window decorations.
-
Since:
-
1.4
paramString
protected String paramString()
-
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.
-
-
Overrides:
-
paramString
in class
Frame
-
-
Returns:
-
a string representation of this JFrame
getAccessibleContext
public AccessibleContext getAccessibleContext()
-
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.
-
-
Specified by:
-
getAccessibleContext
in interface
Accessible
-
Overrides:
-
getAccessibleContext
in class
Frame
-
-
Returns:
-
an AccessibleJFrame that serves as the AccessibleContext of this JFrame