Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class GraphicsDevice - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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Java^TM 2 Platform
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java.awt
Class GraphicsDevice

java.lang.Object
  |
  +--java.awt.GraphicsDevice

public abstract class GraphicsDevice
extends Object

The GraphicsDevice class describes the graphics devices that might be available in a particular graphics environment. These include screen and printer devices. Note that there can be many screens and many printers in an instance of GraphicsEnvironment. Each graphics device has one or more GraphicsConfiguration objects associated with it. These objects specify the different configurations in which the GraphicsDevice can be used.

See Also:: GraphicsEnvironment, GraphicsConfiguration

Field Summary

static int TYPE_IMAGE_BUFFER
          Device is an image buffer.

static int TYPE_PRINTER
          Device is a printer.

static int TYPE_RASTER_SCREEN
          Device is a raster screen.

Constructor Summary

protected GraphicsDevice()
          This is an abstract class that cannot be instantiated directly.

Method Summary

GraphicsConfiguration getBestConfiguration(GraphicsConfigTemplate gct)
          Returns the "best" configuration possible that passes the criteria defined in the GraphicsConfigTemplate.

abstract GraphicsConfiguration[] getConfigurations()
          Returns all of the GraphicsConfiguration objects associated with this GraphicsDevice.

abstract GraphicsConfiguration getDefaultConfiguration()
          Returns the default GraphicsConfiguration associated with this GraphicsDevice.

abstract String getIDstring()
          Returns the identification string associated with this GraphicsDevice.

abstract int getType()
          Returns the type of this GraphicsDevice.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TYPE_RASTER_SCREEN

public static final int TYPE_RASTER_SCREEN

Device is a raster screen.

TYPE_PRINTER

public static final int TYPE_PRINTER

Device is a printer.

TYPE_IMAGE_BUFFER

public static final int TYPE_IMAGE_BUFFER

Device is an image buffer. This buffer can reside in device or system memory but it is not physically viewable by the user.

Constructor Detail

GraphicsDevice

protected GraphicsDevice()

This is an abstract class that cannot be instantiated directly. Instances must be obtained from a suitable factory or query method.

See Also:: GraphicsEnvironment.getScreenDevices(), GraphicsEnvironment.getDefaultScreenDevice(), GraphicsConfiguration.getDevice()

Method Detail

getType

public abstract int getType()

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:: TYPE_RASTER_SCREEN, TYPE_PRINTER, TYPE_IMAGE_BUFFER

getIDstring

public abstract String getIDstring()

Returns the identification string associated with this GraphicsDevice.

Returns:: a String that is the identification of this GraphicsDevice.

getConfigurations

public abstract GraphicsConfiguration[] getConfigurations()

Returns all of the GraphicsConfiguration objects associated with this GraphicsDevice.

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

getDefaultConfiguration

public abstract GraphicsConfiguration getDefaultConfiguration()

Returns the default GraphicsConfiguration associated with this GraphicsDevice.

Returns:: the default GraphicsConfiguration of this GraphicsDevice.

getBestConfiguration

public GraphicsConfiguration getBestConfiguration(GraphicsConfigTemplate gct)

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

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