java.awt
Class Checkbox

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Checkbox

All Implemented Interfaces:

java.awt.image.ImageObserver

public class Checkbox

extends Component

A Checkbox object is a graphical user interface element that has a boolean state.

Field Summary

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Checkbox()
Constructs a Checkbox with no label, no Checkbox group, and initialized to a false state.

Checkbox(String label)
Constructs a Checkbox with the specified label, no Checkbox group, and initialized to a false state.

Checkbox(String label, CheckboxGroup group, boolean state)
Constructs a Checkbox with the specified label, specified Checkbox group, and specified boolean state.

Method Summary

void	addNotify() Creates the peer of the Checkbox.
CheckboxGroup	getCheckboxGroup() Returns the checkbox group.
String	getLabel() Gets the label of the button.
boolean	getState() Returns the boolean state of the Checkbox.
protected String	paramString() Returns the parameter String of this Checkbox.
void	setCheckboxGroup(CheckboxGroup g) Sets the CheckboxGroup to the specified group.
void	setLabel(String label) Sets the button with the specified label.
void	setState(boolean state) Sets the Checkbox to the specifed boolean state.

Methods inherited from class java.awt.Component

action, bounds, checkImage, checkImage, createImage, createImage, deliverEvent, disable, enable, enable, getBackground, getColorModel, getFont, getFontMetrics, getForeground, getGraphics, getParent, getPeer, getToolkit, gotFocus, handleEvent, hide, imageUpdate, inside, invalidate, isEnabled, isShowing, isValid, isVisible, keyDown, keyUp, layout, list, list, list, locate, location, lostFocus, minimumSize, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paint, paintAll, postEvent, preferredSize, prepareImage, prepareImage, print, printAll, removeNotify, repaint, repaint, repaint, repaint, requestFocus, reshape, resize, resize, setBackground, setFont, setForeground, show, show, size, toString, update, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

Checkbox

public Checkbox()

Constructs a Checkbox with no label, no Checkbox group, and initialized to a false state.

Checkbox

public Checkbox(String label)

Constructs a Checkbox with the specified label, no Checkbox group, and initialized to a false state.

Parameters:

label - the label on the Checkbox

Checkbox

public Checkbox(String label,
                CheckboxGroup group,
                boolean state)

Constructs a Checkbox with the specified label, specified Checkbox group, and specified boolean state. If the specified CheckboxGroup is not equal to null, then this Checkbox becomes a Checkbox button. If the Checkbox becomes a button, this simply means that only one Checkbox in a CheckboxGroup may be set at a time.

Parameters:

label - the label on the Checkbox

group - the CheckboxGroup this Checkbox is in

state - is the initial state of this Checkbox

Method Detail

addNotify

public void addNotify()

Creates the peer of the Checkbox. The peer allows you to change the look of the Checkbox without changing its functionality.

Overrides:

addNotify in class Component

See Also:

Component.getPeer(), Component.removeNotify()

getLabel

public String getLabel()

Gets the label of the button.

See Also:

setLabel(java.lang.String)

setLabel

public void setLabel(String label)

Sets the button with the specified label.

Parameters:

label - the label of the button

See Also:

getLabel()

getState

public boolean getState()

Returns the boolean state of the Checkbox.

See Also:

setState(boolean)

setState

public void setState(boolean state)

Sets the Checkbox to the specifed boolean state.

Parameters:

state - the boolean state

See Also:

getState()

getCheckboxGroup

public CheckboxGroup getCheckboxGroup()

Returns the checkbox group.

See Also:

setCheckboxGroup(java.awt.CheckboxGroup)

setCheckboxGroup

public void setCheckboxGroup(CheckboxGroup g)

Sets the CheckboxGroup to the specified group.

Parameters:

g - the new CheckboxGroup

See Also:

getCheckboxGroup()

paramString

protected String paramString()

Returns the parameter String of this Checkbox.

Overrides:

paramString in class Component