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public  abstract  class  java.awt.Component
    extends  java.lang.Object  (I-§1.12)
    implements java.awt.image.ImageObserver  (II-§2.11)
{
        // Methods
    public boolean  action(Event  evt, Object  what);	§1.10.1
    public void addNotify();	§1.10.2
    public Rectangle bounds();	§1.10.3
    public int checkImage(Image  image,	§1.10.4
                                    ImageObserver  observer);
    public int checkImage(Image  image,	§1.10.5
                                    int  width, int  height,
                                    ImageObserver  observer);
    public Image createImage(ImageProducer  producer);	§1.10.6
    public Image createImage(int  width, int  height);	§1.10.7
    public void deliverEvent(Event  evt);	§1.10.8
    public void disable();	§1.10.9
    public void enable();	§1.10.10
    public void enable(boolean  cond);	§1.10.11
    public Color getBackground();	§1.10.12
    public ColorModel getColorModel();	§1.10.13
    public Font getFont();	§1.10.14
    public FontMetrics getFontMetrics(Font  font);	§1.10.15
    public Color getForeground();	§1.10.16
    public Graphics getGraphics();	§1.10.17
    public Container getParent();	§1.10.18
    public ComponentPeer getPeer();	§1.10.19
    public Toolkit getToolkit();	§1.10.20
    public boolean gotFocus(Event  evt, Object  what);	§1.10.21
    public boolean handleEvent(Event  evt);	§1.10.22
    public void hide();	§1.10.23
    public boolean imageUpdate(Image  img, int  flags, int  x,	§1.10.24
                                            int  y, int  w, int  h);
    public boolean inside(int  x, int  y);	§1.10.25
    public void invalidate();	§1.10.26
    public boolean isEnabled();	§1.10.27
    public boolean isShowing();	§1.10.28
    public boolean isValid();	§1.10.29
    public boolean isVisible();	§1.10.30
    public boolean keyDown(Event  evt, int  key);	§1.10.31
    public boolean keyUp(Event  evt, int  key);	§1.10.32
    public void layout();	§1.10.33
    public void list();	§1.10.34
    public void list(PrintStream  out);	§1.10.35
    public void list(PrintStream  out, int  indent);	§1.10.36
    public Component locate(int  x, int  y);	§1.10.37
    public Point location();	§1.10.38
    public boolean lostFocus(Event  evt, Object  what);	§1.10.39
    public Dimension minimumSize();	§1.10.40
    public boolean mouseDown(Event  evt, int  x, int  y);	§1.10.41
    public boolean mouseDrag(Event  evt, int  x, int  y);	§1.10.42 
    public boolean mouseEnter(Event  evt, int  x, int  y);	§1.10.43
    public boolean mouseExit(Event  evt, int  x, int  y);	§1.10.44
    public boolean mouseMove(Event  evt, int  x, int  y);	§1.10.45
    public boolean mouseUp(Event  evt, int  x, int  y);	§1.10.46
    public void move(int  x, int  y);	§1.10.47
    public void nextFocus();	§1.10.48
    public void paint(Graphics  g);	§1.10.49
    public void paintAll(Graphics  g);	§1.10.50
    protected String paramString();	§1.10.51
    public boolean postEvent(Event  evt);	§1.10.52
    public Dimension preferredSize();	§1.10.53
    public boolean 	§1.10.54
          prepareImage(Image  image,  ImageObserver  observer);
    public 	§1.10.55
          prepareImage(Image  image,  int  width, int height, 
                                          ImageObserver observer);	     
    public void print(Graphics  g);	§1.10.56
    public void printAll(Graphics  g);	§1.10.57
    public void removeNotify();	§1.10.58
    public void repaint();	§1.10.59
    public void repaint(int  x, int  y, int  width, int height);	§1.10.60
    public void repaint(long  tm);	§1.10.61
    public void repaint(long  tm, int  x, int  y,	§1.10.62
                                  int  width, int  height);
    public void requestFocus();	§1.10.63
    public void reshape(int  x, int  y, int  width, int height);	§1.10.64
    public void resize(Dimension  d);	§1.10.65
    public void resize(int  width, int  height);	§1.10.66
    public void setBackground(Color  c);	§1.10.67
    public void setFont(Font  f);	§1.10.68
    public void setForeground(Color  c);	§1.10.69
    public void show();	§1.10.70
    public void show(boolean  cond);	§1.10.71
    public Dimension size();	§1.10.72
    public String toString();	§1.10.73
    public void update(Graphics  g);	§1.10.74
    public void validate();	§1.10.75
}

This method is called when an action occurs inside this component. This method is usually called by handleEvent (II-§1.10.22), in which case the what argument contains the arg field of the event argument. The specific value and type of the what argument depends on the component that originally triggered the action.

The method returns true to indicate that it has successfully handled the action or false if the event that triggered the action should be passed up to the component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The action method of Component simply returns false.

Parameters:

evt - the event that caused the action

what - the action

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

This method notifies the Component to create a peer. This peer allows the application to change the look of a component without changing its functionality.

The addNotify method of Component sets a flag indicating that the component needs to be laid out again because its size has possibly changed.

Most applications do not call this method directly.

See Also:

getPeer (II-§1.10.19)
removeNotify (II-§1.10.58).

Returns:

the containing rectangle of this component.

See Also:

reshape (II-§1.10.64).

Returns the status of the construction of a screen representation of the specified image.

This method does not cause the image to begin loading. An application must use the prepareImage (II-§1.10.55) method to force the loading of an image.

The checkImage method of Component calls its peer's checkImage method (II-§3.6.1) to calculate the flags. If this component does not yet have a peer, the component's toolkit's checkImage method (II-§1.41.2) is called instead.

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

Parameters:

image - the Image whose status is being checked

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

Returns:

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

Returns the status of the construction of a scaled screen representation of the specified image.

This method does not cause the image to begin loading. An application must use the prepareImage (II-§1.10.55) method to force the loading of an image.

The checkImage method of Component calls its peer's checkImage method (II-§3.6.1) to calculate the flags. If this component does not yet have a peer, the component's toolkit's checkImage method (II-§1.41.2) is called instead.

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 flags for the data that is currently available.

Creates an image from the specified image producer.

Parameters:

producer - the image producer

Returns:

the image produced.

Parameters:

width - the specified width

height - the specified height

Returns:

an off-screen drawable image, which can be used for double buffering.

Delivers an event to this component or one of its subcomponents.

The deliverEvent method of Component calls the component's postEvent method (II-§1.10.52) on the event.

Parameters:

evt - the event

See Also:

handleEvent (II-§1.10.22).

Makes this component insensitive to user input.

See Also:

isEnabled (II-§1.10.27)
enable (II-§1.10.10).

Makes this component sensitive to user input. This is the default.

See Also:

isEnabled (II-§1.10.27)
disable (II-§1.10.9).

If the boolean argument is true, enables this component. If false, disables it.

Parameters:

cond - a boolean indicating whether to enable or disable this component

Determines the background color of this component. If this component has not specified a background color using the setBackground method (II-§1.10.67), the background color of its parent component is returned.

Returns:

the background color of this component.

Detetermins the color model of this component. 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 (transparency) components.

The getColorModel method of Component calls its peer's getColorModel method (II-§3.6.7) to determine the component's color model. If this component does not yet have a peer, the component's toolkit's getColorModel method (II-§1.41.22) is called instead.

Returns:

the color model of this component.

Determines the font of this component. If this component has not yet specified a font using the setFont method (II-§1.10.68), the font of its parent component is returned.

Returns:

the font of this component.

Determines the font metrics for the specified font when rendered by a platform-dependent toolkit.

The getFontMetrics method checks to see if this component has a peer (II-§1.10.19). If so, the peer's getFontMetrics method (II-§3.6.8) is called. Otherwise, the component's toolkit's get-Font-Metrics method (II-§1.41.25) is called.

Parameters:

font - the font

Returns:

the font metrics for the specified font.

See Also:

getFont (II-§1.10.14).

Determines the foreground color of this component. If this component has not specified a background color using the setForeground method (II-§1.10.69), the background color of its parent component is returned.

Returns:

the foreground color of this component.

Returns:

the graphics context of this component; this method returns null if the component does not currently have a peer.

See Also:

paint (II-§1.10.49).

Returns:

the parent of this component.

Returns:

the peer of this component.

The toolkit is used to create this component's peer when its its add-Notify method (II-§1.10.2) is called.

A Component's toolkit is determined by its containing Frame (II-§1.19).

Returns:

the toolkit of this component.

This method is called when the this component receives the input focus. This method is usually called by handleEvent (II-§1.10.22), in which case the what argument contains the arg field of the event argument.

The method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to the component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The getFocus method of Component simply returns false.

The what argument is currently always null.

Parameters:

evt - the event that caused the action

what - the action

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

See Also:

requestFocus (II-§1.10.63)
lostFocus (II-§1.10.39).

This method is called when any event occurs inside this component.

The method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to the component's parent.

The handleEvent method of Component determines the type of event, and calls one of the following methods, if appropriate:
action (II-§1.10.1)
gotFocus (II-§1.10.21) lostFocus (II-§1.10.39)
keyDown (II-§1.10.31) keyUp (II-§1.10.32)
mouseEnter (II-§1.10.43) mouseExit (II-§1.10.44)
mouseMove (II-§1.10.45) mouseDrag (II-§1.10.42)
mouseDown (II-§1.10.41) mouseUp (II-§1.10.46)
and returns whatever value that method returns. If none of those methods is appropriate, then handleEvent returns false.

All the above methods are called with the event as their first argument. The action method is called with the arg field of the event as its second argument. The keyUp and keyDown are passed the key field of the event as its second argument. The six mouse methods are passed the x and y fields of the event as their second and third argument, respectively.¹

Parameters:

nevt - the event

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

Hides this component. The component continues to exist and be in its containing object, but it is not visible and does not have any space allocated for it.

See Also:

isVisible (II-§1.10.30)
show (II-§1.10.70).

This imageUpdate method of an ImageObserver (such as Component) is called when more information about an image which had been previously requested using an asynchronous interface (such as draw-Image) becomes available. See §2.11.9 on page 311 for more information on this method and its arguments.

The imageUpdate method of Component incrementally draws an image on the component as more of the bits of the image are available.

If the system property "awt.image.incrementalDraw" is missing or has the value "true", the image is incrementally drawn, If the system property has any other value, then the image is not drawn until it has been completely loaded.

Also, if incremental drawing is in effect, the value of the system property "awt.image.redrawrate" is interpreted as an integer to give the maximum redraw rate, in milliseconds. If the system property is missing or cannot be interpreted as an integer, the redraw rate is once every 100ms.

The interpretation of the x, y, width, and height arguments depends on the infoflags argument.

Parameters:

img - the image being observed

infoflags - see §2.11.9 for more information

x - an x coordinate

y - a y coordinate

width - the width

height - the height

Returns:

true if the flags have indicated that the image is completely loaded; false otherwise.

Determines if the specified location is inside this component.

The inside method of Component returns true if the location is inside the bounding box (II-§1.10.3) of the component.

Parameters:

x - the x coordinate

y - the y coordinate

Returns:

true if the specified location lies within this component; false otherwise.

See Also:

locate (II-§1.10.37).

Invalidates this component. This component is marked as having changed. The next call to the validate (II-§1.10.75) method on this component or its parent(s) causes the component to be laid out again.

See Also:

layout (II-§1.10.33)

LayoutManager (II-§1.43).

Indicates whether this component is enabled to receive events. By default, components are initially enabled.

A component is disabled by calling its disable method (II-§1.10.9). A component is enabled by calling its enable method (II-§1.10.10)

Returns:

true if this component is enabled; false otherwise.

Indicates whether this component is visible. A component is showing if it is visible (II-§1.10.30) and is inside a container this is both visible and showing.

A component is hidden by calling its hide method (II-§1.10.23). A component is made visible by calling its show method (II-§1.10.70).

Returns:

true if this component is showing; false otherwise.

Indicates whether this component is valid. A component is valid if it has a peer and it and its subcomponents have been properly laid out.

Returns:

true if this component is valid; false otherwise.

See Also:

validate (II-§1.10.75)
invalidate (II-§1.10.26).

Indicates whether this component is visible. Except for top-level components such as a frame, components are visible unless they have been specifically been made invisible by a call to the hide method (II-§1.10.23).

Returns:

true if this component is showing; false otherwise.

See Also:

show (II-§1.10.70).

This method is called when a key is pressed and this component has the focus. This method is usually called by handleEvent (II-§1.10.22), in which case the key argument contains the key field of the event argument.

This method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to the component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The keyDown method of Component simply returns false.

Note that the key argument is an int rather than a char.

Parameters:

evt - the event that caused the action

key - the key that has been pressed

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

This method is called when a key is released and this component has the focus. This method is usually called by handleEvent (II-§1.10.22), in which case the key argument contains the key field of the event argument.

This method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to this component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The keyUp method of Component simply returns false.

Note that the key argument is an int rather than a char.

Parameters:

evt - the event that caused the action

key - the key that has been pressed

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

This method is called to lay out the subcomponents of this component so that they fit inside the borders of this component.

This method is called when this component is validated by a call to the validate method (II-§1.10.75). Most applications should not call this method directly.

The layout method of Component does nothing.

See Also:

LayoutManager (II-§1.43).

Prints a listing of this component to System.out (I-§1.18.3).

Prints a listing of this component to the specified output stream.

Parameters:

out - a print stream

Prints a listing of this component to the specified output stream. The listing starts at the specified indentation.

The list method of Component calls the println method (I-§2.18.23) on the component after indenting by the specified amount.

Parameters:

out - a print stream

indent - number of spaces to indent

Determines if this component or one of its subcomponents contains the coordinate, and if so returns the containing component. This method only looks one level deep. If the point is inside a subcomponent that itself has subcomponents, it does not go looking down the subcomponent tree.

The locate method of Component simply returns the component itself if the coordinate is inside (II-§1.10.25) its bounding box, and null otherwise.

Parameters:

x - the x coordinate

y - the y coordinate

Returns:

the component or subcomponent that contains the coordinate ; null if the coordinate is outside this component.

Returns:

the location of this component in its parent's coordinate space.

See Also:

move (II-§1.10.47).

This method is called when this component loses the input focus. This method is usually called by handleEvent (II-§1.10.22), in which case the what argument contains the arg field of the event argument.

This method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to this component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The getFocus method of Component simply returns false.

The what argument is currently always null.

Parameters:

evt - the event that caused the action

what - the action that's occuring

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

See Also:

requestFocus (II-§1.10.63)
gotFocus (II-§1.10.21).

Determines the minimum size of thiscomponent.

The minimumSize method of Component checks to see if the component has a peer (II-§1.10.19). If so, the minimumSize request is passed to the peer (II-§3.6.13). Otherwise, the minimum size is the width and height specified by the most recent reshape (II-§1.10.64) or resize (II-§1.10.65) method call.

Returns:

the minimum size of this component.

See Also:

preferredSize (II-§1.10.53)
LayoutManager (II-§1.43).

This method is called when the mouse button is pushed inside this component. This method is usually called by handleEvent (II-§1.10.22), in which case the x and y arguments contains the x and y field of the event argument.The coordinate is relative to the top-left corner of this component.

This method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to this component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The mouseDown method of Component simply returns false.

Parameters:

evt - the event that caused the action

x - the x coordinate

y - the y coordinate

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

This method is called when the mouse button is moved inside this component with the button pushed. This method is usually called by handleEvent (II-§1.10.22), in which case the x and y arguments contains the x and y field of the event argument.The coordinate is relative to the top- left corner of this component.

Mouse drag events continue to get sent to this component even when the mouse has left the bounds of the component. The drag events continue until a mouse up event occurs.

This method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to this component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The mouseDrag method of Component simply returns false.

Parameters:

evt - the event that caused the action

x - the x coordinate

y - the y coordinate

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

This method is called when the mouse first enters this component. This method is usually called by handleEvent (II-§1.10.22), in which case the x and y arguments contains the x and y field of the event argument. The coordinate is relative to the top-left corner of this component.

This method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to this component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The mouseEnter method of Component simply returns false.

Parameters:

evt - the event that caused the action

x - the x coordinate

y - the y coordinate

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

This method is called when the mouse exits this component. This method is usually called by handleEvent (II-§1.10.22), in which case the x and y arguments contains the x and y field of the event argument. The coordinate is relative to the top-left corner of this component. Most applications should return either true or the value of super.handleEvent(evt).

This method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to this component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The mouseEixt method of Component simply returns false.

Parameters:

evt - the event that caused the action

x - the x coordinate

y - the y coordinate

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

This method is called when the mouse is moved inside this component with the mouse button not pushed. This method is usually called by handleEvent (II-§1.10.22), in which case the x and y arguments contains the x and y field of the event argument. The coordinate is relative to the top-left corner of this component.

This method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to this component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The mouseMove method of Component simply returns false.

Parameters:

evt - the event that caused the action

x - the x coordinate

y - the y coordinate

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

This method is called when the mouse button is released inside this component. This method is usually called by handleEvent (II-§1.10.22), in which case the x and y arguments contains the x and y field of the event argument. The coordinate is relative to the top-left corner of the component.

This method returns true to indicate that it has successfully handled the action; or false if the event that triggered the action should be passed up to this component's parent. Most applications should return either true or the value of super.handleEvent(evt).

The mouseUp method of Component simply returns false.

Parameters:

evt - the event that caused the action

x - the x coordinate

y - the y coordinate

Returns:

true if the event has been handled and no further action is necessary; false if the event is to be given to the component's parent.

Moves this component to the coordinate in the parent's coordinate space. The coordinate is relative to the top-left corner of the parent component.

Components that are in a container with a layout manager should not call this method explicitly.

Parameters:

x - the x coordinate

y - the y coordinate

See Also:

location (II-§1.10.38)
reshape (II-§1.10.64).

Moves the input focus to the next component, as determined by the component's peer (II-§3.6.14).

See Also:

requestFocus (II-§1.10.63)
gotFocus (II-§1.10.21).

Paints this component. Most application components, including applets, override this method.

The paint method of Component calls the repaint method (II-§3.6.19) of this component's peer.

The coordinate of the graphics context is the top-left corner of this components. The clipping region of the graphics context is the bounding rectangle of this component.

The paint method of Component calls the repaint method (II-§3.6.19) of this component's peer.

Parameters:

g - the graphics context to use for painting

See Also:

update (II-§1.10.74).

Paints this component and all of its subcomponents.

The coordinate of the graphics context is the top-left corner of this component. The clipping region of the graphics context is the bounding rectangle of this component

Parameters:

g - the graphics context to use for painting

See Also:

paint (II-§1.10.49).

Returns the parameter string representing the state of this component. This string is useful for debugging.

Returns:

the parameter string of this component.

Posts an event to this component by calling its handleEvent method (II-§1.10.22). If handleEvent returns false, the event is posted to this component's parent.

If this component and all of its parents return false, the event is passed to this component's peer object's handleEvent method (II-§3.6.11).

Parameters:

evt - the event

Returns:

true if this component, one of its parents, or this component's peer handled the event; false otherwise.

See Also:

deliverEvent (II-§1.10.8).

Determines the preferred size of the component.

The preferredSize method of Component checks to see if this component has a peer (II-§1.10.19). If so, the preferredSize request is passed to the peer (II-§3.6.16). Otherwise, the preferred size is the width and height specified by the most recent reshape (II-§1.10.64) or resize (II-§1.10.65) method call.

Returns:

the preferred size of this component.

See Also:

minimumSize (II-§1.10.40)
LayoutManager (II-§1.43).

Prepares an image for rendering on this component.

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

Parameters:

image - the Image to prepare a screen representation for

observer - the ImageObserver (II-§2.11) object to be notified as the image is being prepared

Returns:

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

Prepares an image for rendering on this component 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.

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 (II-§2.11) object to be notified as the image is being prepared

Returns:

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

Prints this component. Applications should override this method for components that must do special processing before being printed.

The print method of Component calls the paint method (II-§1.10.49).

The coordinate of the graphics context is the top-left corner of this component. The clipping region of the graphics context is the bounding rectangle of this component

Parameters:

g - the graphics context to use for printing

See Also:

paint (II-§1.10.49).

Paints this component and all of its subcomponents.

The coordinate of the graphics context is the top-left corner of this component. The clipping region of the graphics context is the bounding rectangle of this component

Parameters:

g - the graphics context to use for printing

See Also:

print (II-§1.10.56).

Notifies this component and all its subcomponents to destroy their peers. Applications should not call this method directly. It is called when a component is removed (§1.11.19 §1.11.20) from its container.

The removeNotify method of Component removes the components peer and has the peer clean up after itself by calling its dispose method (II-§3.6.5).

See Also:

getPeer (II-§1.10.19)
addNotify (II-§1.10.2).

Repaints this component.

This method causes a call to this component's update method (II-§1.10.74) as soon as possible.

Repaints the specified rectangle of this component.

This method causes a call to this component's update method (II-§1.10.74) as soon as possible.

Parameters:

x - the x coordinate

y - the y coordinate

width - the width

height - the height

Repaints theis component within tm milliseconds.

This method causes a call to this component's update method (II-§1.10.74).

Parameters:

tm - maximum time in milliseconds before update

Repaints the specified rectangle of this component within tm milliseconds.

This method causes a call to this component's update method (II-§1.10.74).

Parameters:

tm - maximum time in milliseconds before update

x - the x coordinate

y - the y coordinate

width - the width

height - the height

Requests that this component get the input focus

This component's gotFocus method (II-§1.10.21) is called when this method is successful.

The requestFocus method of Component calls the request-Focus method (II-§3.6.21) of the component's peer.

Reshapes this component to the specified bounding box in its parent's coordinate space. Components that are in a container with a layout manager should not call this method explicitly.

Parameters:

x - the x coordinate

y - the y coordinate

width - the width of this component

height - the height of this component

See Also:

bounds (II-§1.10.3)
move (II-§1.10.47)
resize (II-§1.10.66).

Resizes this component to the width and height specified by the dimension argument. Components that are in a container with a layout manager should not call this method explicitly.

Parameters:

d - the new dimension for this component

See Also:

size (II-§1.10.72)
reshape (II-§1.10.64).

Resizes this component to the specified width and height. Components that are in a container with a layout manager should not call this method explicitly.

Parameters:

width - the new width of this component

height - the new height of this component

See Also:

size (II-§1.10.72)
reshape (II-§1.10.64).

Sets the background color of this component.

The setBackground method of Component calls the setBackground method (II-§3.6.23) of the component's peer.

Parameters:

c - the color

See Also:

getBackground (II-§1.10.12).

Sets the font of this component.

The setFont method of Component calls the setFont method (II-§3.6.24) of the component's peer.

Parameters:

f - the font

See Also:

getFont (II-§1.10.14).

Sets the foreground color of this component.

The setForeground method of Component calls the setForeground method (II-§3.6.25) of the component's peer.

Parameters:

c - the color

See Also:

getForeground (II-§1.10.16).

Shows this component; if this component had been made invisible by a call to the hide method (II-§1.10.23), makes this component visible again.

See Also:

isVisible (II-§1.10.30).

If the boolean argument is true, makes this component visible. If false, makes this component invisible.

Parameters:

cond - if true, show this component; if false, hide this component.

See Also:

show (II-§1.10.70)
hide (II-§1.10.23).

Returns:

the current size of this component.

See Also:

resize (II-§1.10.65).

Returns:

a string representation of this component.

Overrides:

toString in class Object (I-§1.12.9).

Updates this component.

The AWT calls the update method in response to a call to repaint (II-§1.10.59). The appearance of the component on the screen has not changed since the last call to update or paint.

The update method of Component:

1. Clears this component by filling it with the background color.

1. Sets the color of the graphics context to be the foreground color of this component.
2. Calls this component's paint method (II-§1.10.49) to completely redraw this component.
   The coordinate of the graphics context is the top-left corner of this components. The clipping region of the graphics context is the bounding rectangle of this component
   Parameters:
   g - the graphics context to use for updating

Validates this component if necessary. This component and any subcomponents are laid out (II-§1.10.33) again, if necessary.

See Also:

invalidate (II-§1.10.26)
LayoutManager (II-§1.43).

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