is new.
java.lang.Objectjava.awt.Component
java.awt.Container
java.awt.Window
public class Window
A Window object is a top-level window with no borders and no menubar. The default layout for a window is BorderLayout.
A window must have either a frame, dialog, or another window defined as its owner when it's constructed.
In a multi-screen environment, you can create a Window on a different screen device by constructing the Window with Window(Window, GraphicsConfiguration) . The GraphicsConfiguration object is one of the GraphicsConfiguration objects of the target screen device.
In a virtual device multi-screen environment in which the desktop area could span multiple physical screen devices, the bounds of all configurations are relative to the virtual device coordinate system. The origin of the virtual-coordinate system is at the upper left-hand corner of the primary physical screen. Depending on the location of the primary screen in the virtual device, negative coordinates are possible, as shown in the following figure.
In such an environment, when calling setLocation, you must pass a virtual coordinate to this method. Similarly, calling getLocationOnScreen on a Window returns virtual device coordinates. Call the getBounds method of a GraphicsConfiguration to find its origin in the virtual coordinate system.
The following code sets the location of a Window at (10, 10) relative to the origin of the physical screen of the corresponding GraphicsConfiguration. If the bounds of the GraphicsConfiguration is not taken into account, the Window location would be set at (10, 10) relative to the virtual-coordinate system and would appear on the primary physical screen, which might be different from the physical screen of the specified GraphicsConfiguration.
Window w = new Window(Window owner, GraphicsConfiguration gc);
Rectangle bounds = gc.getBounds();
w.setLocation(10 + bounds.x, 10 + bounds.y);
Note: the location and size of top-level windows (including Windows, Frames, and Dialogs) are under the control of the desktop's window management system. Calls to setLocation, setSize, and setBounds are requests (not directives) which are forwarded to the window management system. Every effort will be made to honor such requests. However, in some cases the window management system may ignore such requests, or modify the requested geometry in order to place and size the Window in a way that more closely matches the desktop settings.
Due to the asynchronous nature of native event handling, the results returned by getBounds, getLocation, getLocationOnScreen, and getSize might not reflect the actual geometry of the Window on screen until the last request has been processed. During the processing of subsequent requests these values might change accordingly while the window management system fulfills the requests.
An application may set the size and location of an invisible Window arbitrarily, but the window management system may subsequently change its size and/or location when the Window is made visible. One or more
ComponentEvents
{@code ComponentEvent)s
will be generated to indicate the new geometry.
Windows are capable of generating the following WindowEvents: WindowOpened, WindowClosed, WindowGainedFocus, WindowLostFocus.
| Nested Class Summary | |
|---|---|
| protected class |
Window.AccessibleAWTWindow
This class implements accessibility support for the Window class. |
| Nested classes/interfaces inherited from class java.awt. Container |
|---|
| Container.AccessibleAWTContainer |
| Nested classes/interfaces inherited from class java.awt. Component |
|---|
| Component.AccessibleAWTComponent , Component.BaselineResizeBehavior , Component.BltBufferStrategy , Component.FlipBufferStrategy |
| Field Summary |
|---|
| 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 | |
|---|---|
|
Window
(
Frame
Constructs a
new, initially
|
|
|
Window
(
Window
Constructs a
new, initially
|
|
|
Window
(
Window
owner,
GraphicsConfiguration
Constructs a
new, initially
|
|
| Method Summary | ||
|---|---|---|
| void |
addNotify
() Makes this Window displayable by creating the connection to its native screen resource. |
|
| void |
addPropertyChangeListener
(
PropertyChangeListener
listener) Adds a PropertyChangeListener to the listener list. |
|
| void |
addPropertyChangeListener
(
String
propertyName,
PropertyChangeListener
listener) Adds a PropertyChangeListener to the listener list for a specific property. |
|
| void |
addWindowFocusListener
(
WindowFocusListener
l) Adds the specified window focus listener to receive window events from this window. |
|
| void |
addWindowListener
(
WindowListener
l) Adds the specified window listener to receive window events from this window. |
|
| void |
addWindowStateListener
(
WindowStateListener
l) Adds the specified window state listener to receive window events from this window. |
|
| void |
applyResourceBundle
(
ResourceBundle
rb) Deprecated. As of J2SE 1.4, replaced by Component.applyComponentOrientation . |
|
| void |
applyResourceBundle
(
String
rbName) Deprecated. As of J2SE 1.4, replaced by Component.applyComponentOrientation . |
|
| void |
createBufferStrategy
(int numBuffers) Creates a new strategy for multi-buffering on this component. |
|
| void |
createBufferStrategy
(int numBuffers,
BufferCapabilities
caps) Creates a new strategy for multi-buffering on this component with the required buffer capabilities. |
|
| void |
dispose
() Releases all of the native screen resources used by this Window, its subcomponents, and all of its owned children. |
|
| AccessibleContext |
getAccessibleContext
() Gets the AccessibleContext associated with this Window. |
|
| BufferStrategy |
getBufferStrategy
() Returns the BufferStrategy used by this component. |
|
| boolean |
getFocusableWindowState
() Returns whether this Window can become the focused Window if it meets the other requirements outlined in isFocusableWindow. |
|
| Container |
getFocusCycleRootAncestor
() Always returns null because Windows have no ancestors; they represent the top of the Component hierarchy. |
|
| Component |
getFocusOwner
() Returns the child Component of this Window that has focus if this Window is focused; returns null otherwise. |
|
| Set < AWTKeyStroke > |
getFocusTraversalKeys
(int id) Gets a focus traversal key for this Window. |
|
| GraphicsConfiguration |
getGraphicsConfiguration
() This method returns the GraphicsConfiguration used by this Window. |
|
List
<
Image
|
getIconImages
()
Returns the sequence of images to be displayed as the icon for this window.
|
|
| InputContext |
getInputContext
() Gets the input context for this window. |
|
|
getListeners
(
Class
<T> listenerType) Returns an array of all the objects currently registered as FooListeners upon this Window. |
|
| Locale |
getLocale
() Gets the Locale object that is associated with this window, if the locale has been set. |
|
| Dialog.ModalExclusionType |
getModalExclusionType
() Returns the modal exclusion type of this window. |
|
| Component |
getMostRecentFocusOwner
() Returns the child Component of this Window that will receive the focus when this Window is focused. |
|
| Window [] |
getOwnedWindows
() Return an array containing all the windows this window currently owns. |
|
| Window |
getOwner
() Returns the owner of this window. |
|
static
Window
|
getOwnerlessWindows
()
Returns an array of all Windows created by this application that have no owner.
|
|
| Toolkit |
getToolkit
() Returns the toolkit of this frame. |
|
| String |
getWarningString
() Gets the warning string that is displayed with this window. |
|
| WindowFocusListener [] |
getWindowFocusListeners
() Returns an array of all the window focus listeners registered on this window. |
|
| WindowListener [] |
getWindowListeners
() Returns an array of all the window listeners registered on this window. |
|
static
Window
|
getWindows
()
Returns an array of all Windows, both owned and ownerless, created by this application.
|
|
| WindowStateListener [] |
getWindowStateListeners
() Returns an array of all the window state listeners registered on this window. |
|
| void |
hide
() Deprecated. As of JDK version 1.5, replaced by setVisible(boolean) . |
|
| boolean |
isActive
() Returns whether this Window is active. |
|
| boolean |
isAlwaysOnTop
() Returns whether this window is an always-on-top window. |
|
| boolean |
isAlwaysOnTopSupported
() Returns whether the always-on-top mode is supported for this window. |
|
| boolean |
isFocusableWindow
() Returns whether this Window can become the focused Window, that is, whether this Window or any of its subcomponents can become the focus owner. |
|
| boolean |
isFocusCycleRoot
() Always returns true because all Windows must be roots of a focus traversal cycle. |
|
| boolean |
isFocused
() Returns whether this Window is focused. |
|
| boolean |
isLocationByPlatform
() Returns true if this Window will appear at the default location for the native windowing system the next time this Window is made visible. |
|
| boolean |
isShowing
() Checks if this Window is showing on screen. |
|
| void |
pack
() Causes this Window to be sized to fit the preferred size and layouts of its subcomponents. |
|
| boolean |
postEvent
(
Event
e) Deprecated. As of JDK version 1.1 replaced by dispatchEvent(AWTEvent). |
|
| protected void |
processEvent
(
AWTEvent
e) Processes events on this window. |
|
| protected void |
processWindowEvent
(
WindowEvent
e) Processes window events occurring on this window by dispatching them to any registered WindowListener objects. |
|
| protected void |
processWindowFocusEvent
(
WindowEvent
e) Processes window focus event occuring on this window by dispatching them to any registered WindowFocusListener objects. |
|
| protected void |
processWindowStateEvent
(
WindowEvent
e) Processes window state event occuring on this window by dispatching them to any registered WindowStateListener objects. |
|
| void |
removeNotify
() Makes this Container undisplayable by removing its connection to its native screen resource. |
|
| void |
removeWindowFocusListener
(
WindowFocusListener
l) Removes the specified window focus listener so that it no longer receives window events from this window. |
|
| void |
removeWindowListener
(
WindowListener
l) Removes the specified window listener so that it no longer receives window events from this window. |
|
| void |
removeWindowStateListener
(
WindowStateListener
l) Removes the specified window state listener so that it no longer receives window events from this window. |
|
| void |
reshape
(int x, int y, int width, int height) Deprecated. As of JDK version 1.1, replaced by setBounds(int, int, int, int). |
|
| void |
setAlwaysOnTop
(boolean alwaysOnTop) Sets whether this window should always be above other windows. |
|
| void |
setBounds
(int x, int y, int width, int height) Moves and resizes this component. |
|
| void |
setBounds
(
Rectangle
r) Moves and resizes this component to conform to the new bounding rectangle r. |
|
| void |
setCursor
(
Cursor
cursor) Set the cursor image to a specified cursor. |
|
| void |
setFocusableWindowState
(boolean focusableWindowState) Sets whether this Window can become the focused Window if it meets the other requirements outlined in isFocusableWindow. |
|
| void |
setFocusCycleRoot
(boolean focusCycleRoot) Does nothing because Windows must always be roots of a focus traversal cycle. |
|
void
|
setIconImage
(
Image
Sets the image to be displayed as the icon for this window.
|
|
void
|
setIconImages
(
List
<? extends
Image
Sets the sequence of images to be displayed as the icon for this window.
|
|
| void |
setLocationByPlatform
(boolean locationByPlatform) Sets whether this Window should appear at the default location for the native windowing system or at the current location (returned by getLocation) the next time the Window is made visible. |
|
| void |
setLocationRelativeTo
(
Component
c) Sets the location of the window relative to the specified component. |
|
| void |
setMinimumSize
(
Dimension
minimumSize) Sets the minimum size of this window to a constant value. |
|
| void |
setModalExclusionType
(
Dialog.ModalExclusionType
exclusionType) Specifies the modal exclusion type for this window. |
|
| void |
setSize
(
Dimension
d) Resizes this component so that it has width d.width and height d.height. |
|
| void |
setSize
(int width, int height) Resizes this component so that it has width width and height height. |
|
| void |
setVisible
(boolean b) Shows or hides this Window depending on the value of parameter b. |
|
| void |
show
() Deprecated. As of JDK version 1.5, replaced by setVisible(boolean) . |
|
| void |
toBack
() If this Window is visible, sends this Window to the back and may cause it to lose focus or activation if it is the focused or active Window. |
|
| void |
toFront
() If this Window is visible, brings this Window to the front and may make it the focused Window. |
|
| Methods inherited from class java.lang. Object |
|---|
| clone , equals , finalize , getClass , hashCode , notify , notifyAll , wait , wait , wait |
| Constructor Detail |
|---|
public Window(Frame owner)
new, initially
If there is a security manager, this method first calls the security manager's checkTopLevelWindow method with this as its argument to determine whether or not the window must be displayed with a warning banner.
HeadlessException
public Window(Window owner)
new, initially
If there is a security manager, this method first calls the security manager's checkTopLevelWindow method with this as its argument to determine whether or not the window must be displayed with a warning banner.
HeadlessException
public Window(Window owner,
GraphicsConfiguration gc)
new, initially
If there is a security manager, this method first calls the security manager's checkTopLevelWindow method with this as its argument to determine whether or not the window must be displayed with a warning banner.
device
HeadlessException
-
| Method Detail |
|---|
getIconImages
public
List
<
Image
>
getIconImages
()
Returns the sequence of images to be displayed as the icon for this window.
This method returns a copy of the internally stored list, so all operations on the returned object will not affect the window's behavior.
Returns:
the copy of icon images' list for this window, or empty list if this window doesn't have icon images.
Since:
1.6
See Also:
setIconImages(java.util.List extends java.awt.Image>
)
,
setIconImage(Image)
setIconImages
public void
setIconImages
(
List
<? extends
Image
> icons)
Sets the sequence of images to be displayed as the icon for this window. Subsequent calls to getIconImages will always return a copy of the icons list.
Depending on the platform capabilities one or several images of different dimensions will be used as the window's icon.
The icons list is scanned for the images of most appropriate dimensions from the beginning. If the list contains several images of the same size, the first will be used.
Ownerless windows with no icon specified use platfrom-default icon. The icon of an owned window may be inherited from the owner unless explicitly overridden. Setting the icon to null or empty list restores the default behavior.
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.
Parameters:
icons - the list of icon images to be displayed.
Since:
1.6
See Also:
getIconImages()
,
setIconImage(Image)
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()
to specify a single image as a window's icon.
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.
Parameters:
image - the icon image to be displayed.
Since:
1.6
See Also:
setIconImages(java.util.List extends java.awt.Image>
)
,
getIconImages()
public void addNotify()
public void removeNotify()
public void pack()
public void setMinimumSize(Dimension minimumSize)
If the setSize or setBounds methods are called afterwards with a width or height less than that specified by setMinimumSize the window is automatically enlarged to honor the minimumSize value. Setting the minimum size to null restores the default behavior.
Resizing operation may be restricted if the user tries to resize window below the minimumSize value. This behaviour is platform-dependent.
public void setSize(Dimension d)
The d.width and d.height values are automatically enlarged if either is less than the minimum size as specified by previous call to setMinimumSize.
public void setSize(int width,
int height)
The width and height values are automatically enlarged if either is less than the minimum size as specified by previous call to setMinimumSize.
@Deprecated
public void reshape(int x,
int y,
int width,
int height)
public void setVisible(boolean b)
Window
is already visible, this will bring the Window to the front.
If false, hides this Window, its subcomponents, and all of its owned children. The Window and its subcomponents can be made visible again with a call to
#setVisible(true).
setVisible(true).
@Deprecated public void show()
@Deprecated public void hide()
public void dispose()
The Window and its subcomponents can be made displayable again by rebuilding the native resources with a subsequent call to pack or show. The states of the recreated Window and its subcomponents will be identical to the states of these objects at the point where the Window was disposed (not accounting for additional modifications between those actions).
Note
: When the last displayable window within the Java virtual machine (VM) is disposed of, the VM may terminate. See
AWT Threading Issues
AWT Threading Issues
for more information.
public void toFront()
Places this Window at the top of the stacking order and shows it in front of any other Windows in this VM. No action will take place if this Window is not visible. Some platforms do not allow Windows which own other Windows to appear on top of those owned Windows. Some platforms may not permit this VM to place its Windows above windows of native applications, or Windows of other VMs. This permission may depend on whether a Window in this VM is already focused. Every attempt will be made to move this Window as high as possible in the stacking order; however, developers should not assume that this method will move this Window above all other windows in every situation.
Because of variations in native windowing systems, no guarantees about changes to the focused and active Windows can be made. Developers must never assume that this Window is the focused or active Window until this Window receives a WINDOW_GAINED_FOCUS or WINDOW_ACTIVATED event. On platforms where the top-most window is the focused window, this method will probably focus this Window, if it is not already focused. On platforms where the stacking order does not typically affect the focused window, this method will probably leave the focused and active Windows unchanged.
If this method causes this Window to be focused, and this Window is a Frame or a Dialog, it will also become activated. If this Window is focused, but it is not a Frame or a Dialog, then the first Frame or Dialog that is an owner of this Window will be activated.
If this window is blocked by modal dialog, then the blocking dialog is brought to the front and remains above the blocked window.
public void toBack()
Places this Window at the bottom of the stacking order and shows it behind any other Windows in this VM. No action will take place is this Window is not visible. Some platforms do not allow Windows which are owned by other Windows to appear below their owners. Every attempt will be made to move this Window as low as possible in the stacking order; however, developers should not assume that this method will move this Window below all other windows in every situation.
Because of variations in native windowing systems, no guarantees about changes to the focused and active Windows can be made. Developers must never assume that this Window is no longer the focused or active Window until this Window receives a WINDOW_LOST_FOCUS or WINDOW_DEACTIVATED event. On platforms where the top-most window is the focused window, this method will probably cause this Window to lose focus. In that case, the next highest, focusable Window in this VM will receive focus. On platforms where the stacking order does not typically affect the focused window, this method will probably leave the focused and active Windows unchanged.
public Toolkit getToolkit()
public final String getWarningString()
If the window is secure, then getWarningString returns null. If the window is insecure, this method checks for the system property awt.appletWarning and returns the string value of that property.
public Locale getLocale()
public InputContext getInputContext()
public void setCursor(Cursor cursor)
The method may have no visual effect if the Java platform implementation and/or the native system do not support changing the mouse cursor shape.
public Window getOwner()
public Window[] getOwnedWindows()
getWindows
public static
Window
[]
getWindows
()
Returns an array of all Windows, both owned and ownerless, created by this application. If called from an applet, the array includes only the Windows accessible by that applet.
Warning:
this method may return system created windows, such as a print dialog. Applications should not assume the existence of these dialogs, nor should an application assume anything about these dialogs such as component positions, LayoutManagers or serialization.
Since:
1.6
See Also:
Frame.getFrames()
,
getOwnerlessWindows()
getOwnerlessWindows
public static
Window
[]
getOwnerlessWindows
()
Returns an array of all Windows created by this application that have no owner. They include Frames and ownerless Dialogs and Windows. If called from an applet, the array includes only the Windows accessible by that applet.
Warning:
this method may return system created windows, such as a print dialog. Applications should not assume the existence of these dialogs, nor should an application assume anything about these dialogs such as component positions, LayoutManagers or serialization.
Since:
1.6
See Also:
Frame.getFrames()
,
getWindows(sun.awt.AppContext)
public void setModalExclusionType(Dialog.ModalExclusionType exclusionType)
If the given type is not supported, NO_EXCLUDE is used.
Note: changing the modal exclusion type for a visible window may have no effect until it is hidden and then shown again.
public Dialog.ModalExclusionType getModalExclusionType()
public void addWindowListener(WindowListener l)
Refer to
AWT Threading Issues
for details on AWT's threading model.
public void addWindowStateListener(WindowStateListener l)
Refer to
AWT Threading Issues
for details on AWT's threading model.
public void addWindowFocusListener(WindowFocusListener l)
Refer to
AWT Threading Issues
for details on AWT's threading model.
Since:
1.4
public void removeWindowListener(WindowListener l)
Refer to
AWT Threading Issues
for details on AWT's threading model.
public void removeWindowStateListener(WindowStateListener l)
Refer to
AWT Threading Issues
for details on AWT's threading model.
public void removeWindowFocusListener(WindowFocusListener l)
Refer to
AWT Threading Issues
for details on AWT's threading model.
Since:
1.4
public WindowListener[] getWindowListeners()
public WindowFocusListener[] getWindowFocusListeners()
public WindowStateListener[] getWindowStateListeners()
public <T extends EventListener> T[] getListeners(Class<T> listenerType)
You can specify the listenerType argument with a class literal, such as FooListener.class. For example, you can query a Window w for its window listeners with the following code:
WindowListener[] wls = (WindowListener[])(w.getListeners(WindowListener.class));If no such listeners exist, this method returns an empty array.
protected void processEvent(AWTEvent e)
Note that if the event parameter is null the behavior is unspecified and may result in an exception.
protected void processWindowEvent(WindowEvent e)
Note that if the event parameter is null the behavior is unspecified and may result in an exception.
protected void processWindowFocusEvent(WindowEvent e)
Note that if the event parameter is null the behavior is unspecified and may result in an exception.
Since:
1.4
protected void processWindowStateEvent(WindowEvent e)
Note that if the event parameter is null the behavior is unspecified and may result in an exception.
public final void setAlwaysOnTop(boolean alwaysOnTop)
throws SecurityException
If some other window is already always-on-top then the relative order between these windows is unspecified (depends on platform). No window can be brought to be over the always-on-top window except maybe another always-on-top window.
All windows owned by an always-on-top window inherit this state and automatically become always-on-top. If a window ceases to be always-on-top, the windows that it owns will no longer be always-on-top. When an always-on-top window is sent toBack , its always-on-top state is set to false.
When this method is called on a window with a value of true, and the window is visible and the platform supports always-on-top for this window, the window is immediately brought forward, "sticking" it in the top-most position. If the window isn`t currently visible, this method sets the always-on-top state to true but does not bring the window forward. When the window is later shown, it will be always-on-top.
When this method is called on a window with a value of false the always-on-top state is set to normal. The window remains in the top-most position but it`s z-order can be changed as for any other window. Calling this method with a value of false on a window that has a normal state has no effect. Setting the always-on-top state to false has no effect on the relative z-order of the windows if there are no other always-on-top windows.
Note : some platforms might not support always-on-top windows. To detect if always-on-top windows are supported by the current platform, use Toolkit.isAlwaysOnTopSupported() and isAlwaysOnTopSupported() . If always-on-top mode isn't supported by the toolkit or for this window, calling this method has no effect.
If a SecurityManager is installed, the calling thread must be granted the AWTPermission "setWindowAlwaysOnTop" in order to set the value of this property. If this permission is not granted, this method will throw a SecurityException, and the current value of the property will be left unchanged.
public boolean isAlwaysOnTopSupported()
public final boolean isAlwaysOnTop()
public Component getFocusOwner()
public Component getMostRecentFocusOwner()
public boolean isActive()
public boolean isFocused()
If the focused Window is a Frame or a Dialog it is also the active Window. Otherwise, the active Window is the first Frame or Dialog that is an owner of the focused Window.
public Set<AWTKeyStroke> getFocusTraversalKeys(int id)
If the traversal key has not been explicitly set for this Window, then this Window's parent's traversal key is returned. If the traversal key has not been explicitly set for any of this Window's ancestors, then the current KeyboardFocusManager's default traversal key is returned.
public final void setFocusCycleRoot(boolean focusCycleRoot)
public final boolean isFocusCycleRoot()
public final Container getFocusCycleRootAncestor()
public final boolean isFocusableWindow()
public boolean getFocusableWindowState()
By default, all Windows have a focusable Window state of true.
public void setFocusableWindowState(boolean focusableWindowState)
Setting a Window's focusability state to false is the standard mechanism for an application to identify to the AWT a Window which will be used as a floating palette or toolbar, and thus should be a non-focusable Window. Setting the focusability state on a visible Window can have a delayed effect on some platforms the actual change may happen only when the Window becomes hidden and then visible again. To ensure consistent behavior across platforms, set the Window's focusable state when the
Window
WIndow
is invisible and then show it.
public void addPropertyChangeListener(PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
public void addPropertyChangeListener(String propertyName,
PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
@Deprecated public boolean postEvent(Event e)
public boolean isShowing()
@Deprecated public void applyResourceBundle(ResourceBundle rb)
@Deprecated public void applyResourceBundle(String rbName)
public AccessibleContext getAccessibleContext()
Since:
1.3
public GraphicsConfiguration getGraphicsConfiguration()
Since:
1.3
public void setLocationRelativeTo(Component c)
If the component is not currently showing, or c is null, the window is placed at the center of the screen. The center point can be determined with GraphicsEnvironment.getCenterPoint
If the bottom of the component is offscreen, the window is placed to the side of the Component that is closest to the center of the screen. So if the Component is on the right part of the screen, the Window is placed to its left, and visa versa.
public void createBufferStrategy(int numBuffers)
Each time this method is called, the existing buffer strategy for this component is discarded.
public void createBufferStrategy(int numBuffers,
BufferCapabilities caps)
throws AWTException
Each time this method is called, the existing buffer strategy for this component is discarded.
public BufferStrategy getBufferStrategy()
public void setLocationByPlatform(boolean locationByPlatform)
This behavior can also be enabled by setting the System Property "java.awt.Window.locationByPlatform" to "true", though calls to this method take precedence.
Calls to setVisible, setLocation and setBounds after calling setLocationByPlatform clear this property of the Window.
For example, after the following code is executed:
The window will be shown at platform's default location and flag will be false.setLocationByPlatform(true); setVisible(true); boolean flag = isLocationByPlatform();
In the following sample:
The window will be shown at (10, 10) and flag will be false.setLocationByPlatform(true); setLocation(10, 10); boolean flag = isLocationByPlatform(); setVisible(true);
public boolean isLocationByPlatform()
public void setBounds(int x,
int y,
int width,
int height)
The width or height values are automatically enlarged if either is less than the minimum size as specified by previous call to setMinimumSize.
public void setBounds(Rectangle r)
The r.width or r.height values will be automatically enlarged if either is less than the minimum size as specified by previous call to setMinimumSize.