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java.lang.Object | +----java.awt.CheckboxGroup
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:
Constructor Summary | |
CheckboxGroup()
CheckboxGroup .
|
Method Summary | |
Checkbox | getCurrent()
|
Checkbox | getSelectedCheckbox()
|
void | setCurrent(Checkbox box)
|
void | setSelectedCheckbox(Checkbox box)
|
String | toString()
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public CheckboxGroup()
CheckboxGroup
.Method Detail |
public Checkbox getSelectedCheckbox()
null
if all check boxes in the
group are off.null
.public Checkbox getCurrent()
getSelectedCheckbox()
.
public void setSelectedCheckbox(Checkbox box)
If the check box argument is null
or belongs to a
different check box group, then this method does nothing.
box
- the Checkbox
to set as the
current selection.
public void setCurrent(Checkbox box)
setSelectedCheckbox(Checkbox)
.
public String toString()
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