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public  abstract  class  java.awt.Toolkit
    extends  java.lang.Object  (I-§1.12)
{
        // Constructors
    public Toolkit();	§1.41.1

        // Methods
    public abstract int	§1.41.2
        checkImage(Image  image, int  width, int height, 
                                      ImageObserver  observer);
    protected abstract ButtonPeer 	§1.41.3
        createButton(Button  target);
    protected abstract CanvasPeer	§1.41.4
        createCanvas(Canvas  target);
    protected abstract CheckboxPeer	§1.41.5
        createCheckbox(Checkbox  target);
    protected abstract CheckboxMenuItemPeer	§1.41.6
        createCheckboxMenuItem(CheckboxMenuItem  target);
    protected abstract ChoicePeer 	§1.41.7
        createChoice(Choice  target);
    protected abstract DialogPeer	§1.41.8
        createDialog(Dialog  target);
    protected abstract FileDialogPeer	§1.41.9
        createFileDialog(FileDialog  target);
    protected abstract FramePeer createFrame(Frame  target);	§1.41.10
        public abstract Image	§1.41.11
        createImage(ImageProducer  producer);
    protected abstract LabelPeer createLabel(Label  target);	§1.41.12
        protected abstract ListPeer createList(List  target);	§1.41.13
        protected abstract MenuPeer createMenu(Menu  target);	§1.41.14
    protected abstract MenuBarPeer	§1.41.15
        createMenuBar(MenuBar  target);
    protected abstract MenuItemPeer	§1.41.16
        createMenuItem(MenuItem  target);
    protected abstract PanelPeer createPanel(Panel  target);	§1.41.17
        protected abstract ScrollbarPeer	§1.41.18
        createScrollbar(Scrollbar  target);
    protected abstract TextAreaPeer	§1.41.19
        createTextArea(TextArea  target);
    protected abstract TextFieldPeer	§1.41.20
        createTextField(TextField  target);
    protected abstract WindowPeer	§1.41.21
        createWindow(Window  target);
    public abstract ColorModel getColorModel();	§1.41.22
    public static Toolkit getDefaultToolkit();	§1.41.23
    public abstract String[] getFontList();	§1.41.24
    public abstract FontMetrics	§1.41.25
        getFontMetrics(Font  font);
    public abstract Image getImage(String  filename);	§1.41.26
    public abstract Image getImage(URL  url);	§1.41.27
    public abstract int getScreenResolution();	§1.41.28
    public abstract Dimension getScreenSize();	§1.41.29
    public abstract boolean	§1.41.30
        prepareImage(Image  image, int  width, int  height,
                                  ImageObserver  observer);
    public abstract void sync();	§1.41.31
}

Most applications should not call any of the methods is this class directly. These methods are called by the addNotify methods of the various components in the Abstract Window Toolkit.

The default constructor for a toolkit.

If the width and height arguments are both -1, this method returns the status of the construction of a screen representaion of the specified image in this toolkit. Otherwise, this method returns the status of the construction of a scaled representation of the specified image at the specified width and height.

This method does not cause the image to begin loading. An application must use the prepareImage (II-§1.41.30) method to force the loading of an image.

This toolkit method is used by the checkImage methods (II-§1.10.4, §1.10.5) of Component.

Information on the flags returned by this method can be found in II-§2.11.

Parameters:

image - the image whose status is being checked

width - the width of the scaled version to check the status of

height - the height of the scaled version to check the status of

observer - the ImageObserver object to be notified as the image is being prepared

Returns:

the bitwise inclusive OR of the ImageObserver (II-§2.11) flags indicating what information about the image is available.

Parameters:

target - the button to be implemented

Returns:

this toolkit's implementation of a Button (II-§1.2).

Parameters:

target - the canvas to be implemented

Returns:

this toolkit's implementation of a Canvas (II-§1.3).

Parameters:

target - the check box to be implemented

Returns:

this toolkit's implementation of a Checkbox (II-§1.5).

Parameters:

target - the check box menu item to be implemented

Returns:

this toolkit's implementation of a CheckboxMenuItem (II-§1.7).

Parameters:

target - the choice list to be implemented

Returns:

this toolkit's implementation of a Choice (II-§1.8).

Parameters:

target - the dialog window to be implemented

Returns:

this toolkit's implementation of a Dialog (II-§1.12).

Parameters:

target - the filie dialog window to be implemented

Returns:

this toolkit's implementation of a FileDialog (II-§1.15).

Parameters:

target - the frame to be implemented

Returns:

this toolkit's implementation of a Frame (II-§1.19).

Parameters:

target - the image to be implemented

Returns:

this toolkit's implementation of an Image (II-§1.24).

Parameters:

target - the label to be implemented

Returns:

this toolkit's implementation of a Label (II-§1.26).

Parameters:

target - the scrolling list to be implemented

Returns:

this toolkit's implementation of a List (II-§1.27).

Parameters:

target - the menu to be implemented

Returns:

this toolkit's implementation of a Menu (II-§1.29).

Parameters:

target - the menu bar to be implemented

Returns:

this toolkit's implementation of a MenuBar (II-§1.30).

Parameters:

target - the menu item to be implemented

Returns:

this toolkit's implementation of a MenuItem (II-§1.32).

Parameters:

target - the panel to be implemented

Returns:

this toolkit's of a Panel (II-§1.33).

Parameters:

target - the scroll bar to be implemented

Returns:

this toolkit's implementation of a ScrollBar (II-§1.37).

Parameters:

target - the text area to be implemented

Returns:

this toolkit's implementation of a TextArea (II-§1.38).

Parameters:

target - the text field to be implemented

Returns:

this toolkit's implementation of a TextField (II-§1.40).

Parameters:

target - the window to be implemented

Returns:

this toolkit's implementation of a Window (II-§1.42).

Determine's the color model of this toolkit's screen.

The ColorModel (II-§2.1) is an abstract class that encapsulates how to translate between pixel values of an image and its red, green, blue, and alpha components.

This toolkit method is used by the getColorModel method (II-§1.10.13) of Component.

Returns:

the color model of the tookit's screen.

Gets the default toolkit.

If there is a system property named "awt.toolkit", that property is treated as the name of a class that is a subclass of Toolkit.

If the system property does not exist, then the default toolkit used is the class named "sun.awt.motif.MToolkit", which is a motif implementation of the Abstract Window Toolkit.

Returns:

the default toolkit.

Throws

AWTError (II-§1.46)

If a toolkit could not be found or could not be instantiated.

Returns:

the names of the available fonts in this toolkit.

Parameters:

font - a font

Returns:

the screen metrics of the font argument in this toolkit.

Parameters:

filename - a file containing pixel data in a recognized file format

Returns:

an image which gets its pixel data from the specified file

Parameters:

url - a URL which specifies an image.

Returns:

an image which gets its pixel data from the specified URL.

Returns:

this toolkit's screen resolution in dots-per-inch.

Returns:

the size of this toolkit's screen in pixels.

Prepares an image for rendering. If the width and height arguments are both -1, this method prepares the image for rendering on the default screen; otherwise, this method prepares an image for rendering on the default screen at the specified width and height.

The image data is downloaded asynchronously in another thread and an appropriately scaled screen representation of the image is generated.

This toolkit method is used by the prepareImage methods (II-§1.10.54, §1.10.55) of Component.

Information on the flags returned by this method can be found in II-§2.11.

Parameters:

image - the image to prepare a screen representation for

width - the width of the desired screen representation

height - the height of the desired screen representation

observer - the ImageObserver object to be notified as the image is being prepared

Returns:

true if the image has already been fully prepared; false otherwise

Synchronizes this toolkit's graphics state. Some window systems may do buffering of graphics events. This method ensures that the display is up to date.

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