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Java Source Code / Java Documentation » 6.0 JDK Core » AWT » java.awt

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

java.awt .CheckboxGroup

CheckboxGroup

public class CheckboxGroup implements java.io.Serializable(Code)

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.

version:
   1.43 05/05/07
author:
   Sami Shaio
See Also:   java.awt.Checkbox
since:
   JDK1.0

Field Summary
Checkbox	selectedCheckbox The current choice.

Constructor Summary
public	CheckboxGroup() Creates a new instance of `CheckboxGroup`.

Method Summary
public Checkbox	getCurrent()
public Checkbox	getSelectedCheckbox() Gets the current choice from this check box group.
public synchronized void	setCurrent(Checkbox box)
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.
public String	toString() Returns a string representation of this check box group, including the value of its current selection.

Field Detail

selectedCheckbox
Checkbox selectedCheckbox(Code)
	The current choice. See Also: CheckboxGroup.getCurrent() See Also: CheckboxGroup.setCurrent(Checkbox)

Constructor Detail

CheckboxGroup
public CheckboxGroup()(Code)
	Creates a new instance of `CheckboxGroup`.

Method Detail

getCurrent
public Checkbox getCurrent()(Code)

getSelectedCheckbox
public Checkbox getSelectedCheckbox()(Code)
	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. the check box that is currently in the"on" state, or `null`. See Also: java.awt.Checkbox See Also: java.awt.CheckboxGroup.setSelectedCheckbox since: JDK1.1

setCurrent
public synchronized void setCurrent(Checkbox box)(Code)

setSelectedCheckbox
public void setSelectedCheckbox(Checkbox box)(Code)
	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 thecurrent selection. See Also: java.awt.Checkbox See Also: java.awt.CheckboxGroup.getSelectedCheckbox since: JDK1.1

toString
public String toString()(Code)
	Returns a string representation of this check box group, including the value of its current selection. a string representation of this check box group.

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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