java.awt
Class CheckboxGroup

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

public class CheckboxGroup

extends Object

implements Serializable

The CheckboxGroup class is used to group together a set of Checkbox buttons.

Exactly one check box button in a CheckboxGroup can be in the "on" state at any given time. Pushing any button sets its state to "on" and forces any other button that is in the "on" state into the "off" state.

The following code example produces a new check box group, with three check boxes:

 setLayout(new GridLayout(3, 1));
 CheckboxGroup cbg = new CheckboxGroup();
 add(new Checkbox("one", cbg, true));
 add(new Checkbox("two", cbg, false));
 add(new Checkbox("three", cbg, false));
 

This image depicts the check box group created by this example:

Since:

JDK1.0

See Also:

Checkbox, Serialized Form

Field Summary

(package private) Checkbox	selectedCheckbox The current choice.
private static long	serialVersionUID

Constructor Summary

CheckboxGroup()
Creates a new instance of CheckboxGroup.

Method Summary

Checkbox	getCurrent() Deprecated. As of JDK version 1.1, replaced by getSelectedCheckbox().
Checkbox	getSelectedCheckbox() Gets the current choice from this check box group.
void	setCurrent(Checkbox box) Deprecated. As of JDK version 1.1, replaced by setSelectedCheckbox(Checkbox).
void	setSelectedCheckbox(Checkbox box) Sets the currently selected check box in this group to be the specified check box.
String	toString() Returns a string representation of this check box group, including the value of its current selection.

Methods inherited from class java.lang.Object

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

Field Detail

selectedCheckbox

Checkbox selectedCheckbox

The current choice.

See Also:

getCurrent(), setCurrent()

serialVersionUID

private static final long serialVersionUID

Constructor Detail

CheckboxGroup

public CheckboxGroup()

Creates a new instance of CheckboxGroup.

Method Detail

getSelectedCheckbox

public Checkbox getSelectedCheckbox()

Gets the current choice from this check box group. The current choice is the check box in this group that is currently in the "on" state, or null if all check boxes in the group are off.

Returns:

the check box that is currently in the "on" state, or null.

Since:

JDK1.1

See Also:

Checkbox, setSelectedCheckbox(java.awt.Checkbox)

getCurrent

public Checkbox getCurrent()

Deprecated. As of JDK version 1.1, replaced by getSelectedCheckbox().

setSelectedCheckbox

public void setSelectedCheckbox(Checkbox box)

Sets the currently selected check box in this group to be the specified check box. This method sets the state of that check box to "on" and sets all other check boxes in the group to be off.

If the check box argument is null or belongs to a different check box group, then this method does nothing.

Parameters:

box - the Checkbox to set as the current selection.

Since:

JDK1.1

See Also:

Checkbox, getSelectedCheckbox()

setCurrent

public void setCurrent(Checkbox box)

Deprecated. As of JDK version 1.1, replaced by setSelectedCheckbox(Checkbox).

toString

public String toString()

Returns a string representation of this check box group, including the value of its current selection.

Returns:

a string representation of this check box group.

Overrides:

toString in class Object