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# Class java.awt.Window

    java.lang.Object
       |
       +----java.awt.Component
               |
               +----java.awt.Container
                       |
                       +----java.awt.Window

public class Window
extends Container

A `Window` object is a top-level window with no borders and no menubar. It could be used to implement a pop-up menu. The default layout for a window is `BorderLayout`. A `Window` object blocks input to other application windows when it is shown.

Windows are capable of generating the following window events: WindowOpened, WindowClosed.

See Also:
  WindowEvent, addWindowListener, BorderLayout

##

Window(Frame)
  Constructs a new invisible window.

##

addNotify()
  Creates the Window's peer.
addWindowListener(WindowListener)
  Adds the specified window listener to receive window events from this window.
dispose()
  Disposes of this window.
getFocusOwner()
  Returns the child component of this Window which has focus if and only if this Window is active.
getLocale()
  Gets the `Locale` object that is associated with this window, if the locale has been set.
getToolkit()
  Returns the toolkit of this frame.
getWarningString()
  Gets the warning string that is displayed with this window.
isShowing()
  Checks if this Window is showing on screen.
pack()
  Causes subcomponents of this window to be laid out at their preferred size.
postEvent(Event)
  Deprecated.
processEvent(AWTEvent)
  Processes events on this window.
processWindowEvent(WindowEvent)
  Processes window events occurring on this window by dispatching them to any registered WindowListener objects.
removeWindowListener(WindowListener)
  Removes the specified window listener so that it no longer receives window events from this window.
show()
  Shows this window, and brings it to the front.
toBack()
  Sends this window to the back.
toFront()
  Brings this window to the front.

##

Window

     public Window(Frame parent)

  Constructs a new invisible window.

  The window is not initially visible. Call the `show` method to cause the window to become visible.

  Parameters:
    parent - the main application frame.
  See Also:
    show, setSize

##

addNotify

     public void addNotify()

  Creates the Window's peer. The peer allows us to modify the appearance of the Window without changing its functionality.

  Overrides:
    addNotify in class Container

pack

     public void pack()

  Causes subcomponents of this window to be laid out at their preferred size.

show

     public void show()

  Shows this window, and brings it to the front.

  If this window is not yet visible, `show` makes it visible. If this window is already visible, then this method brings it to the front.

  Overrides:
    show in class Component
  See Also:
    toFront, setVisible

dispose

     public void dispose()

  Disposes of this window. This method must be called to release the resources that are used for the window.

toFront

     public void toFront()

  Brings this window to the front. Places this window at the top of the stacking order and shows it in front of any other windows.

  See Also:
    toBack

toBack

     public void toBack()

  Sends this window to the back. Places this window at the bottom of the stacking order and makes the corresponding adjustment to other visible windows.

  See Also:
    toFront

getToolkit

     public Toolkit getToolkit()

  Returns the toolkit of this frame.

  Returns:
    the toolkit of this window.
  Overrides:
    getToolkit in class Component
  See Also:
    Toolkit, getDefaultToolkit, getToolkit

getWarningString

     public final String getWarningString()

  Gets the warning string that is displayed with this window. If this window is insecure, the warning string is displayed somewhere in the visible area of the window. A window is insecure if there is a security manager, and the security manager's `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 methods checks for the system property `awt.appletWarning` and returns the string value of that property.

  Returns:
    the warning string for this window.
  See Also:
    checkTopLevelWindow

getLocale

     public Locale getLocale()

  Gets the `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.

  Returns:
    the locale that is set for this window.
  Overrides:
    getLocale in class Component
  See Also:
    Locale

addWindowListener

     public synchronized void addWindowListener(WindowListener l)

  Adds the specified window listener to receive window events from this window.

  Parameters:
    l - the window listener

removeWindowListener

     public synchronized void removeWindowListener(WindowListener l)

  Removes the specified window listener so that it no longer receives window events from this window.

  Parameters:
    l - the window listener

processEvent

     protected void processEvent(AWTEvent e)

  Processes events on this window. If the event is an WindowEvent, it invokes the processWindowEvent method, else it invokes its superclass's processEvent.

  Parameters:
    e - the event
  Overrides:
    processEvent in class Container

processWindowEvent

     protected void processWindowEvent(WindowEvent e)

  Processes window events occurring on this window by dispatching them to any registered WindowListener objects. NOTE: This method will not be called unless window events are enabled for this component; this happens when one of the following occurs: a) A WindowListener object is registered via addWindowListener() b) Window events are enabled via enableEvents()

  Parameters:
    e - the window event
  See Also:
    enableEvents

getFocusOwner

     public Component getFocusOwner()

  Returns the child component of this Window which has focus if and only if this Window is active.

  Returns:
    the component with focus, or null if no children have focus assigned to them.

postEvent

     public boolean postEvent(Event e)

  Note: postEvent() is deprecated. As of JDK version 1.1 replaced by `dispatchEvent(AWTEvent)`.

  Overrides:
    postEvent in class Component

isShowing

     public boolean isShowing()

  Checks if this Window is showing on screen.

  Overrides:
    isShowing in class Component
  See Also:
    setVisible

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