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Class java.awt.CheckboxGroup

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

public class CheckboxGroup

extends Object

implements Serializable

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:

Version:

1.21 07/01/98

Author:

Sami Shaio

Since:

JDK1.0

See Also:

Checkbox

java.awt.CheckboxGroup()

Creates a new instance of CheckboxGroup.

getCurrent()

getSelectedCheckbox()

Gets the current choice from this check box group.

setCurrent(Checkbox)

setSelectedCheckbox(Checkbox)

Sets the currently selected check box in this group to be the specified check box.

toString()

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

public CheckboxGroup()

Creates a new instance of CheckboxGroup.

Since:

JDK1.0

public java.awt.Checkbox getCurrent()

Note: getCurrent() is deprecated. As of JDK version 1.1, replaced by getSelectedCheckbox().

public java.awt.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

public synchronized void setCurrent(Checkbox box)

Note: setCurrent() is deprecated. As of JDK version 1.1, replaced by setSelectedCheckbox(Checkbox).

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

public java.lang.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

Since:

JDK1.0

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