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Class CheckboxGroup

java.lang.Object

java.awt.CheckboxGroup

All Implemented Interfaces:: Serializable

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:

Shows three checkboxes,
arranged vertically, labeled one, two, and three. Checkbox one is in the on
state.

Since:

1.0

See Also:

Constructor Summary

Constructor	Description
`CheckboxGroup()`	Creates a new instance of `CheckboxGroup`.

Method Summary

Modifier and Type	Method	Description
`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 declared in class java.lang.Object

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

Constructor Details

CheckboxGroup

public CheckboxGroup()

Creates a new instance of CheckboxGroup.

Method Details

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:

1.1

See Also:

getCurrent

@Deprecated public Checkbox getCurrent()

Deprecated.

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

Returns the current choice from this check box group or null if none of checkboxes are selected.

Returns:: the selected checkbox

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, all check boxes in this check box group are deselected. If the check box argument belongs to a different check box group, this method does nothing.

Parameters:

box - the Checkbox to set as the current selection.

Since:

1.1

See Also:

setCurrent

@Deprecated public void setCurrent(Checkbox box)

Deprecated.

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

Sets the currently selected check box in this group to be the specified check box and unsets all others.

Parameters:: box - the Checkbox to set as the current selection.

toString

public String toString()

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

Overrides:: toString in class Object
Returns:: a string representation of this check box group.

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/CheckboxGroup.html