java.lang.Object
java.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.
Windows are capable of generating the following WindowEvents: WindowOpened, WindowClosed, WindowGainedFocus, WindowLostFocus.
WindowEvent, addWindowListener(java.awt.event.WindowListener), BorderLayout, Serialized Form
Window(Frame owner)
Frame as its owner. Window(Window owner)
Window as its owner. Window(Window owner, GraphicsConfiguration gc)
GraphicsConfiguration of a screen device. Method Summary void addNotify()
void addPropertyChangeListener(PropertyChangeListener listener)
void addPropertyChangeListener(String propertyName, PropertyChangeListener listener)
void addWindowFocusListener(WindowFocusListener l)
void addWindowListener(WindowListener l)
void addWindowStateListener(WindowStateListener l)
void applyResourceBundle(ResourceBundle rb)
Component.applyComponentOrientation. void applyResourceBundle(String rbName)
Component.applyComponentOrientation. void createBufferStrategy(int numBuffers)
void createBufferStrategy(int numBuffers, BufferCapabilities caps)
void dispose()
Window, its subcomponents, and all of its owned children. protected void finalize()
AccessibleContext getAccessibleContext()
BufferStrategy getBufferStrategy()
boolean getFocusableWindowState()
isFocusableWindow. Container getFocusCycleRootAncestor()
null because Windows have no ancestors; they represent the top of the Component hierarchy. Component getFocusOwner()
Set<AWTKeyStroke> getFocusTraversalKeys(int id)
GraphicsConfiguration getGraphicsConfiguration()
InputContext getInputContext()
<T extends EventListener>
T[] getListeners(Class<T> listenerType)
FooListeners upon this Window. Locale getLocale()
Locale object that is associated with this window, if the locale has been set. Component getMostRecentFocusOwner()
Window[] getOwnedWindows()
Window getOwner()
Toolkit getToolkit()
String getWarningString()
WindowFocusListener[] getWindowFocusListeners()
WindowListener[] getWindowListeners()
WindowStateListener[] getWindowStateListeners()
void hide()
Component.setVisible(boolean). boolean isActive()
boolean isAlwaysOnTop()
boolean isFocusableWindow()
boolean isFocusCycleRoot()
true because all Windows must be roots of a focus traversal cycle. boolean isFocused()
boolean isLocationByPlatform()
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()
void pack()
boolean postEvent(Event e)
dispatchEvent(AWTEvent). protected void processEvent(AWTEvent e)
protected void processWindowEvent(WindowEvent e)
protected void processWindowFocusEvent(WindowEvent e)
protected void processWindowStateEvent(WindowEvent e)
WindowStateListener objects. void removeWindowFocusListener(WindowFocusListener l)
void removeWindowListener(WindowListener l)
void removeWindowStateListener(WindowStateListener l)
void setAlwaysOnTop(boolean alwaysOnTop)
void setBounds(int x, int y, int width, int height)
void setCursor(Cursor cursor)
void setFocusableWindowState(boolean focusableWindowState)
isFocusableWindow. void setFocusCycleRoot(boolean focusCycleRoot)
void setLocationByPlatform(boolean locationByPlatform)
getLocation) the next time the Window is made visible. void setLocationRelativeTo(Component c)
void show()
Component.setVisible(boolean). void toBack()
void toFront()
add, 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, paint, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setComponentZOrder, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, transferFocusBackward, transferFocusDownCycle, update, 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, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, setBackground, setBounds, setComponentOrientation, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setName, setPreferredSize, setSize, setSize, setVisible, show, size, toString, transferFocus, transferFocusUpCycle Window
public Window(Frame owner)
Frame as its owner. The Window will not be focusable unless its owner is showing on the screen.
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.
owner - the Frame to act as owner
IllegalArgumentException - if the owner's GraphicsConfiguration is not from a screen device
IllegalArgumentException - if owner is null; this exception is always thrown when GraphicsEnvironment.isHeadless returns true
GraphicsEnvironment.isHeadless(), SecurityManager.checkTopLevelWindow(java.lang.Object), isShowing()
public Window(Window owner)
Window as its owner. The Window will not be focusable unless its nearest owning Frame or Dialog is showing on the screen.
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.
owner - the Window to act as owner
IllegalArgumentException - if the owner's GraphicsConfiguration is not from a screen device
IllegalArgumentException - if owner is null. This exception is always thrown when GraphicsEnvironment.isHeadless() returns true.
GraphicsEnvironment.isHeadless(), SecurityManager.checkTopLevelWindow(java.lang.Object), isShowing()
public Window(Window owner,
GraphicsConfiguration gc)
GraphicsConfiguration of a screen device. The Window will not be focusable unless its nearest owning Frame or Dialog is showing on the screen.
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.
owner - the window to act as owner
gc - the GraphicsConfiguration of the target screen device; if gc is null, the system default GraphicsConfiguration is assumed
IllegalArgumentException - if owner is null
IllegalArgumentException - if gc is not from a screen device; this exception is always thrown when GraphicsEnvironment.isHeadless returns true
GraphicsEnvironment.isHeadless(), SecurityManager.checkTopLevelWindow(java.lang.Object), GraphicsConfiguration.getBounds(), isShowing()
protected void finalize()
throws Throwable
finalize in class Object
Throwable - the Exception raised by this method
public void addNotify()
addNotify in class Container
Component.isDisplayable(), Container.removeNotify()
public void pack()
Component.isDisplayable()
@Deprecated public void show()
Component.setVisible(boolean).
show in class Component
@Deprecated public void hide()
Component.setVisible(boolean).
hide in class Component
public void dispose()
Window, its subcomponents, and all of its owned children. That is, the resources for these Components will be destroyed, any memory they consume will be returned to the OS, and they will be marked as undisplayable.
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 for more information.
Component.isDisplayable(), pack(), show()
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.
toBack()
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.
toFront()
public Toolkit getToolkit()
getToolkit in class Component
Toolkit, Toolkit.getDefaultToolkit(), Component.getToolkit()
public final String getWarningString()
checkTopLevelWindow method returns false when this window is passed to it as an argument.
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.
SecurityManager.checkTopLevelWindow(java.lang.Object)
public Locale getLocale()
Locale object that is associated with this window, if the locale has been set. If no locale has been set, then the default locale is returned.
getLocale in class Component
Locale
public InputContext getInputContext()
getInputContext in class Component
null if no context can be determined
Component.getInputContext()
public void setCursor(Cursor cursor)
setCursor in class Component
cursor - One of the constants defined by the Cursor class. If this parameter is null then the cursor for this window will be set to the type Cursor.DEFAULT_CURSOR.
Component.getCursor(), Cursor
public Window getOwner()
public Window[] getOwnedWindows()
public void addWindowListener(WindowListener l)
l - the window listener
removeWindowListener(java.awt.event.WindowListener), getWindowListeners()
public void addWindowStateListener(WindowStateListener l)
l is null, no exception is thrown and no action is performed.
l - the window state listener
removeWindowStateListener(java.awt.event.WindowStateListener), getWindowStateListeners()
public void addWindowFocusListener(WindowFocusListener l)
l - the window focus listener
removeWindowFocusListener(java.awt.event.WindowFocusListener), getWindowFocusListeners()
public void removeWindowListener(WindowListener l)
l - the window listener
addWindowListener(java.awt.event.WindowListener), getWindowListeners()
public void removeWindowStateListener(WindowStateListener l)
l is null, no exception is thrown and no action is performed.
l - the window state listener
addWindowStateListener(java.awt.event.WindowStateListener), getWindowStateListeners()
public void removeWindowFocusListener(WindowFocusListener l)
l - the window focus listener
addWindowFocusListener(java.awt.event.WindowFocusListener), getWindowFocusListeners()
public WindowListener[] getWindowListeners()
WindowListeners or an empty array if no window listeners are currently registered
addWindowListener(java.awt.event.WindowListener), removeWindowListener(java.awt.event.WindowListener)
public WindowFocusListener[] getWindowFocusListeners()
WindowFocusListeners or an empty array if no window focus listeners are currently registered
addWindowFocusListener(java.awt.event.WindowFocusListener), removeWindowFocusListener(java.awt.event.WindowFocusListener)
public WindowStateListener[] getWindowStateListeners()
WindowStateListeners or an empty array if no window state listeners are currently registered
addWindowStateListener(java.awt.event.WindowStateListener), removeWindowStateListener(java.awt.event.WindowStateListener)
public <T extends EventListener> T[] getListeners(Class<T> listenerType)
FooListeners upon this Window. FooListeners are registered using the addFooListener method.
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.
getListeners in class Container
listenerType - the type of listeners requested; this parameter should specify an interface that descends from java.util.EventListener
FooListeners on this window, or an empty array if no such listeners have been added
ClassCastException - if listenerType doesn't specify a class or interface that implements java.util.EventListener
getWindowListeners()
protected void processEvent(AWTEvent e)
WindowEvent, it invokes the processWindowEvent method, else it invokes its superclass's processEvent.
Note that if the event parameter is null the behavior is unspecified and may result in an exception.
processEvent in class Container
e - the event
Component.processComponentEvent(java.awt.event.ComponentEvent), Component.processFocusEvent(java.awt.event.FocusEvent), Component.processKeyEvent(java.awt.event.KeyEvent), Component.processMouseEvent(java.awt.event.MouseEvent), Component.processMouseMotionEvent(java.awt.event.MouseEvent), Component.processInputMethodEvent(java.awt.event.InputMethodEvent), Component.processHierarchyEvent(java.awt.event.HierarchyEvent), Component.processMouseWheelEvent(java.awt.event.MouseWheelEvent)
protected void processWindowEvent(WindowEvent e)
addWindowListenerenableEventsNote that if the event parameter is null the behavior is unspecified and may result in an exception.
e - the window event
Component.enableEvents(long)
protected void processWindowFocusEvent(WindowEvent e)
addWindowFocusListenerenableEventsNote that if the event parameter is null the behavior is unspecified and may result in an exception.
e - the window focus event
Component.enableEvents(long)
protected void processWindowStateEvent(WindowEvent e)
WindowStateListener objects. NOTE: this method will not be called unless window state events are enabled for this window. This happens when one of the following occurs:
WindowStateListener is registered via addWindowStateListenerenableEventsNote that if the event parameter is null the behavior is unspecified and may result in an exception.
e - the window state event
Component.enableEvents(long)
public final void setAlwaysOnTop(boolean alwaysOnTop)
throws SecurityException
If some other window already is always-on-top then the relative order between these windows is unspecified (depends on platform). No window can be brought to be over always-on-top window except maybe another always-on-top window.
All owned windows of an always-on-top window automatically become always-on-top windows. If a window ceases to be always-on-top its owned windows cease to be always-on-top.
When an always-on-top window is sent toBack its always-on-top state is set to false.
This method makes the window always-on-top if alwaysOnTop is true. If the window is visible, this includes bringing window toFront, then "sticking" it to the top-most position. If the window is not visible it does nothing other than setting the always-on-top property. If later the window is shown, it will be always-on-top. If the Window is already always-on-top, this call does nothing.
If alwaysOnTop is false this method changes the state from always-on-top to normal. The window remains top-most but its z-order can be changed in the normal way as for any other window. Does nothing if this Window is not always-on-top. Has no effect on relative z-order of windows if there are no other always-on-top windows.
Note: some platforms might not support always-on-top windows. There is no public API to detect if the platform supports always-on-top at runtime.
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.
alwaysOnTop - new value of always-on-top state of the window
SecurityException - if the calling thread does not have permission to set the value of always-on-top property
isAlwaysOnTop(), toFront(), toBack(), AWTPermission
public final boolean isAlwaysOnTop()
true, if the window is in always-on-top state, false otherwise
setAlwaysOnTop(boolean)
public Component getFocusOwner()
getMostRecentFocusOwner(), isFocused()
public Component getMostRecentFocusOwner()
getFocusOwner(). If this Window is not focused, then the child Component that most recently requested focus will be returned. If no child Component has ever requested focus, and this is a focusable Window, then this Window's initial focusable Component is returned. If no child Component has ever requested focus, and this is a non-focusable Window, null is returned.
getFocusOwner(), isFocused(), isFocusableWindow()
public boolean isActive()
isFocused()
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.
isActive()
public Set<AWTKeyStroke> getFocusTraversalKeys(int id)
setFocusTraversalKeys for a full description of each key.)
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.
getFocusTraversalKeys in class Container
id - one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
IllegalArgumentException - if id is not one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
Container.setFocusTraversalKeys(int, java.util.Set), KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
public final void setFocusCycleRoot(boolean focusCycleRoot)
setFocusCycleRoot in class Container
focusCycleRoot - this value is ignored
isFocusCycleRoot(), Container.setFocusTraversalPolicy(java.awt.FocusTraversalPolicy), Container.getFocusTraversalPolicy()
public final boolean isFocusCycleRoot()
true because all Windows must be roots of a focus traversal cycle.
isFocusCycleRoot in class Container
true
setFocusCycleRoot(boolean), Container.setFocusTraversalPolicy(java.awt.FocusTraversalPolicy), Container.getFocusTraversalPolicy()
public final Container getFocusCycleRootAncestor()
null because Windows have no ancestors; they represent the top of the Component hierarchy.
getFocusCycleRootAncestor in class Component
null
Container.isFocusCycleRoot()
public final boolean isFocusableWindow()
true. For a Window which is not a Frame or Dialog to be focusable, its focusable Window state must be set to true, its nearest owning Frame or Dialog must be showing on the screen, and it must contain at least one Component in its focus traversal cycle. If any of these conditions is not met, then neither this Window nor any of its subcomponents can become the focus owner.
true if this Window can be the focused Window; false otherwise
getFocusableWindowState(), setFocusableWindowState(boolean), isShowing(), Component.isFocusable()
public boolean getFocusableWindowState()
isFocusableWindow. If this method returns false, then isFocusableWindow will return false as well. If this method returns true, then isFocusableWindow may return true or false depending upon the other requirements which must be met in order for a Window to be focusable.
By default, all Windows have a focusable Window state of true.
isFocusableWindow(), setFocusableWindowState(boolean), isShowing(), Component.setFocusable(boolean)
public void setFocusableWindowState(boolean focusableWindowState)
isFocusableWindow. If this Window's focusable Window state is set to false, then isFocusableWindow will return false. If this Window's focusable Window state is set to true, then isFocusableWindow may return true or false depending upon the other requirements which must be met in order for a Window to be focusable.
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 is invisible and then show it.
focusableWindowState - whether this Window can be the focused Window
isFocusableWindow(), getFocusableWindowState(), isShowing(), Component.setFocusable(boolean)
public void addPropertyChangeListener(PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
addPropertyChangeListener in class Container
listener - the PropertyChangeListener to be added
Component.removePropertyChangeListener(java.beans.PropertyChangeListener), addPropertyChangeListener(java.lang.String,java.beans.PropertyChangeListener)
public void addPropertyChangeListener(String propertyName,
PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
addPropertyChangeListener in class Container
propertyName - one of the property names listed above
listener - the PropertyChangeListener to be added
addPropertyChangeListener(java.beans.PropertyChangeListener), Component.removePropertyChangeListener(java.beans.PropertyChangeListener)
@Deprecated public boolean postEvent(Event e)
dispatchEvent(AWTEvent).
postEvent in interface MenuContainer
postEvent in class Component
public boolean isShowing()
isShowing in class Component
true if the component is showing, false otherwise
Component.setVisible(boolean)
@Deprecated public void applyResourceBundle(ResourceBundle rb)
Component.applyComponentOrientation.
@Deprecated public void applyResourceBundle(String rbName)
Component.applyComponentOrientation.
public AccessibleContext getAccessibleContext()
getAccessibleContext in interface Accessible
getAccessibleContext in class Component
public GraphicsConfiguration getGraphicsConfiguration()
getGraphicsConfiguration in class Component
GraphicsConfiguration used by this Component or null
public void setLocationRelativeTo(Component c)
c is null, the window is centered on the screen. 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.
c - the component in relation to which the window's location is determined
public void createBufferStrategy(int numBuffers)
BufferStrategy with that number of buffers. A page-flipping strategy is attempted first, then a blitting strategy using accelerated buffers. Finally, an unaccelerated blitting strategy is used.
Each time this method is called, the existing buffer strategy for this component is discarded.
numBuffers - number of buffers to create
IllegalArgumentException - if numBuffers is less than 1.
IllegalStateException - if the component is not displayable
Component.isDisplayable(), getBufferStrategy()
public void createBufferStrategy(int numBuffers,
BufferCapabilities caps)
throws AWTException
Each time this method is called, the existing buffer strategy for this component is discarded.
numBuffers - number of buffers to create, including the front buffer
caps - the required capabilities for creating the buffer strategy; cannot be null
AWTException - if the capabilities supplied could not be supported or met; this may happen, for example, if there is not enough accelerated memory currently available, or if page flipping is specified but not possible.
IllegalArgumentException - if numBuffers is less than 1, or if caps is null
getBufferStrategy()
public BufferStrategy getBufferStrategy()
createBufferStrategy(int)
public void setLocationByPlatform(boolean locationByPlatform)
getLocation) the next time the Window is made visible. This behavior resembles a native window shown without programmatically setting its location. Most windowing systems cascade windows if their locations are not explicitly set. The actual location is determined once the window is shown on the screen.
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 andsetLocationByPlatform(true); setVisible(true); boolean flag = isLocationByPlatform();
flag will be false.
In the following sample:
The window will be shown at (10, 10) andsetLocationByPlatform(true); setLocation(10, 10); boolean flag = isLocationByPlatform(); setVisible(true);
flag will be false.
locationByPlatform - true if this Window should appear at the default location, false if at the current location
IllegalComponentStateExceptiontrue.
Component.setLocation(int, int), isShowing(), Component.setVisible(boolean), isLocationByPlatform(), System.getProperty(String)
public boolean isLocationByPlatform()
true if this Window will appear at the default location for the native windowing system the next time this Window is made visible. This method always returns false if the Window is showing on the screen.
setLocationByPlatform(boolean), isShowing()
public void setBounds(int x,
int y,
int width,
int height)
Component
x and y, and the new size is specified by width and height.
setBounds in class Component
x - the new x-coordinate of this component
y - the new y-coordinate of this component
width - the new width of this component
height - the new height of this component
setLocationByPlatform(boolean), isLocationByPlatform()
Copyright © 2004, 2010 Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
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