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Java Source Code / Java Documentation » 6.0 JDK Core » swing » javax.swing

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

javax.swing .ButtonGroup

ButtonGroup

public class ButtonGroup implements Serializable(Code)

This class is used to create a multiple-exclusion scope for a set of buttons. Creating a set of buttons with the same ButtonGroup object means that turning "on" one of those buttons turns off all other buttons in the group.

A ButtonGroup can be used with any set of objects that inherit from AbstractButton. Typically a button group contains instances of JRadioButton, JRadioButtonMenuItem, or JToggleButton. It wouldn't make sense to put an instance of JButton or JMenuItem in a button group because JButton and JMenuItem don't implement the selected state.

Initially, all buttons in the group are unselected.

For examples and further information on using button groups see How to Use Radio Buttons, a section in The Java Tutorial.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans^TM has been added to the java.beans package. Please see java.beans.XMLEncoder .
version:
1.45 05/05/07
author:
Jeff Dinkins

Field Summary
protected Vector<AbstractButton>	buttons
ButtonModel	selection The current selection.

Constructor Summary
public	ButtonGroup() Creates a new `ButtonGroup`.

Method Summary
public void	add(AbstractButton b) Adds the button to the group.
public void	clearSelection() Clears the selection such that none of the buttons in the `ButtonGroup` are selected.
public int	getButtonCount() Returns the number of buttons in the group.
public Enumeration<AbstractButton>	getElements() Returns all the buttons that are participating in this group.
public ButtonModel	getSelection() Returns the model of the selected button.
public boolean	isSelected(ButtonModel m) Returns whether a `ButtonModel` is selected.
public void	remove(AbstractButton b) Removes the button from the group.
public void	setSelected(ButtonModel m, boolean b) Sets the selected value for the `ButtonModel`.

Field Detail

buttons
protected Vector<AbstractButton> buttons(Code)

selection
ButtonModel selection(Code)
	The current selection.

Constructor Detail

ButtonGroup
public ButtonGroup()(Code)
	Creates a new `ButtonGroup`.

Method Detail

add
public void add(AbstractButton b)(Code)
	Adds the button to the group. Parameters: b - the button to be added

clearSelection
public void clearSelection()(Code)
	Clears the selection such that none of the buttons in the `ButtonGroup` are selected. since: 1.6

getButtonCount
public int getButtonCount()(Code)
	Returns the number of buttons in the group. the button count since: 1.3

getElements
public Enumeration<AbstractButton> getElements()(Code)
	Returns all the buttons that are participating in this group. an `Enumeration` of the buttons in this group

getSelection
public ButtonModel getSelection()(Code)
	Returns the model of the selected button. the selected button model

isSelected
public boolean isSelected(ButtonModel m)(Code)
	Returns whether a `ButtonModel` is selected. `true` if the button is selected,otherwise returns `false`

remove
public void remove(AbstractButton b)(Code)
	Removes the button from the group. Parameters: b - the button to be removed

setSelected
public void setSelected(ButtonModel m, boolean b)(Code)
	Sets the selected value for the `ButtonModel`. Only one button in the group may be selected at a time. Parameters: m - the `ButtonModel` Parameters: b - `true` if this button is to beselected, otherwise `false`

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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