This method returns the number of bytes available in accelerated memory on this device.

  This method returns the number of bytes available in
accelerated memory on this device.
Some images are created or cached
in accelerated memory on a first-come,
first-served basis. On some operating systems,
this memory is a finite resource. Calling this method
and scheduling the creation and flushing of images carefully may
enable applications to make the most efficient use of
that finite resource.


Note that the number returned is a snapshot of how much
memory is available; some images may still have problems
being allocated into that memory. For example, depending
on operating system, driver, memory configuration, and
thread situations, the full extent of the size reported
may not be available for a given image. There are further
inquiry methods on the ImageCapabilities object
associated with a VolatileImage that can be used to determine
whether a particular VolatileImage has been created in accelerated
memory.
Returns: number of bytes available in accelerated memory. A negative return value indicates that the amount of accelerated memory on this GraphicsDevice is indeterminate.
Since: 1.4
See Also: Image.flush(), ImageCapabilities.isAccelerated(),

  Returns the "best" configuration possible that passes the criteria defined in the GraphicsConfigTemplate.

  Returns the "best" configuration possible that passes the
criteria defined in the GraphicsConfigTemplate.
Returns: a GraphicsConfiguration that passes the criteria defined in the specified GraphicsConfigTemplate.
Parameters:
- gct - the GraphicsConfigTemplate object used to obtain a valid GraphicsConfiguration
See Also: GraphicsConfigTemplate,

  Returns all of the GraphicsConfiguration objects associated with this GraphicsDevice.

  Returns all of the GraphicsConfiguration
objects associated with this GraphicsDevice.
Returns: an array of GraphicsConfiguration objects that are associated with this GraphicsDevice.

  Returns the default GraphicsConfiguration associated with this GraphicsDevice.

  Returns the default GraphicsConfiguration
associated with this GraphicsDevice.
Returns: the default GraphicsConfiguration of this GraphicsDevice.

  Returns the current display mode of this GraphicsDevice.

  Returns the current display mode of this
GraphicsDevice.
The returned display mode is allowed to have a refresh rate
DisplayMode.REFRESH_RATE_UNKNOWN if it is indeterminate.
Likewise, the returned display mode is allowed to have a bit depth
DisplayMode.BIT_DEPTH_MULTI if it is indeterminate or if multiple
bit depths are supported.
Returns: the current display mode of this graphics device.
Since: 1.4
See Also: GraphicsDevice.setDisplayMode(DisplayMode),

  Returns all display modes available for this GraphicsDevice.

  Returns all display modes available for this
GraphicsDevice.
The returned display modes are allowed to have a refresh rate
DisplayMode.REFRESH_RATE_UNKNOWN if it is indeterminate.
Likewise, the returned display modes are allowed to have a bit depth
DisplayMode.BIT_DEPTH_MULTI if it is indeterminate or if multiple
bit depths are supported.
Returns: all of the display modes available for this graphics device.
Since: 1.4

  Returns the Window object representing the full-screen window if the device is in full-screen mode.

  Returns the Window object representing the
full-screen window if the device is in full-screen mode.
Returns: the full-screen window, or null if the device is not in full-screen mode.
Since: 1.4
See Also: GraphicsDevice.setFullScreenWindow(Window),

  Returns the identification string associated with this GraphicsDevice.

  Returns the identification string associated with this GraphicsDevice.

A particular program might use more than one GraphicsDevice in a GraphicsEnvironment. This method returns a String identifying a particular GraphicsDevice in the local GraphicsEnvironment. Although there is no public method to set this String, a programmer can use the String for debugging purposes. Vendors of the Java^TM Runtime Environment can format the return value of the String. To determine how to interpret the value of the String, contact the vendor of your Java Runtime. To find out who the vendor is, from your program, call the getProperty method of the System class with "java.vendor".
Returns: a String that is the identification of this GraphicsDevice.

  Returns the type of this GraphicsDevice.

  Returns the type of this GraphicsDevice.
Returns: the type of this GraphicsDevice, which can either be TYPE_RASTER_SCREEN, TYPE_PRINTER or TYPE_IMAGE_BUFFER.
See Also: GraphicsDevice.TYPE_RASTER_SCREEN, GraphicsDevice.TYPE_PRINTER, GraphicsDevice.TYPE_IMAGE_BUFFER,

  Returns true if this GraphicsDevice supports low-level display changes.

  Returns true if this GraphicsDevice
supports low-level display changes.
On some platforms low-level display changes may only be allowed in
full-screen exclusive mode (i.e., if GraphicsDevice.isFullScreenSupported()
returns true and the application has already entered
full-screen mode using GraphicsDevice.setFullScreenWindow(java.awt.Window)).
Returns: whether low-level display changes are supported for this graphics device.
Since: 1.4
See Also: GraphicsDevice.isFullScreenSupported(), GraphicsDevice.setDisplayMode(java.awt.DisplayMode), GraphicsDevice.setFullScreenWindow(java.awt.Window),

  Returns true if this GraphicsDevice supports full-screen exclusive mode.

  Returns true if this GraphicsDevice
supports full-screen exclusive mode.
If a SecurityManager is installed, its
checkPermission method will be called
with AWTPermission("fullScreenExclusive").
isFullScreenSupported returns true only if
that permission is granted.
Returns: whether full-screen exclusive mode is available for this graphics device
Since: 1.4
See Also: AWTPermission,

  Sets the display mode of this graphics device.

  Sets the display mode of this graphics device. This is only allowed if GraphicsDevice.isDisplayChangeSupported() returns true and may require first entering full-screen exclusive mode using GraphicsDevice.setFullScreenWindow(java.awt.Window) providing that full-screen exclusive mode is supported (i.e., GraphicsDevice.isFullScreenSupported() returns true).

The display mode must be one of the display modes returned by GraphicsDevice.getDisplayModes(), with one exception: passing a display mode with DisplayMode.REFRESH_RATE_UNKNOWN refresh rate will result in selecting a display mode from the list of available display modes with matching width, height and bit depth. However, passing a display mode with DisplayMode.BIT_DEPTH_MULTI for bit depth is only allowed if such mode exists in the list returned by GraphicsDevice.getDisplayModes().

Example code:

 Frame frame;
 DisplayMode newDisplayMode;
 GraphicsDevice gd;
 // create a Frame, select desired DisplayMode from the list of modes
 // returned by gd.getDisplayModes() ...

 if (gd.isFullScreenSupported()) {
     gd.setFullScreenWindow(frame);
 } else {
    // proceed in non-full-screen mode
    frame.setSize(...);
    frame.setLocation(...);
    frame.setVisible(true);
 }

 if (gd.isDisplayChangeSupported()) {
     gd.setDisplayMode(newDisplayMode);
 }
 

Parameters:
- dm - The new display mode of this graphics device.
Throws:
- IllegalArgumentException - if the DisplayMode supplied is null, or is not available in the array returned by getDisplayModes
- UnsupportedOperationException - if isDisplayChangeSupported returns false
Since: 1.4
See Also: GraphicsDevice.getDisplayMode(), GraphicsDevice.getDisplayModes(), GraphicsDevice.isDisplayChangeSupported(),

  Enter full-screen mode, or return to windowed mode.

  Enter full-screen mode, or return to windowed mode. The entered full-screen mode may be either exclusive or simulated. Exclusive mode is only available if isFullScreenSupported returns true.

Exclusive mode implies:

• Windows cannot overlap the full-screen window. All other application windows will always appear beneath the full-screen window in the Z-order.
• There can be only one full-screen window on a device at any time, so calling this method while there is an existing full-screen Window will cause the existing full-screen window to return to windowed mode.
• Input method windows are disabled. It is advisable to call Component.enableInputMethods(false) to make a component a non-client of the input method framework.

Simulated full-screen mode resizes the window to the size of the screen and positions it at (0,0).

When entering full-screen mode, if the window to be used as the full-screen window is not visible, this method will make it visible. It will remain visible when returning to windowed mode.

When returning to windowed mode from an exclusive full-screen window, any display changes made by calling setDisplayMode are automatically restored to their original state.
Parameters:
- w - a window to use as the full-screen window; null if returning to windowed mode. Some platforms expect the fullscreen window to be a top-level component (i.e., a Frame); therefore it is preferable to use a Frame here rather than a Window.
Since: 1.4
See Also: GraphicsDevice.isFullScreenSupported(), GraphicsDevice.getFullScreenWindow(), GraphicsDevice.setDisplayMode(java.awt.DisplayMode), Component.enableInputMethods(boolean), Component.setVisible(boolean),