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Class java.awt.CheckboxGroup
java.lang.Object
|
+----java.awt.CheckboxGroup
- 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:
- Since:
- JDK1.0
- See Also:
- Checkbox
-
CheckboxGroup()
- Creates a new instance of
CheckboxGroup
.
-
getCurrent()
-
Deprecated.
-
getSelectedCheckbox()
- Gets the current choice from this check box group.
-
setCurrent(Checkbox)
-
Deprecated.
-
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.
CheckboxGroup
public CheckboxGroup()
- Creates a new instance of
CheckboxGroup
.
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
.
- See Also:
- Checkbox, setSelectedCheckbox
getCurrent
public Checkbox getCurrent()
- Note: getCurrent() is deprecated.
As of JDK version 1.1,
replaced by
getSelectedCheckbox()
.
setSelectedCheckbox
public synchronized 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.
- See Also:
- Checkbox, getSelectedCheckbox
setCurrent
public synchronized void setCurrent(Checkbox box)
- Note: setCurrent() is deprecated.
As of JDK version 1.1,
replaced by
setSelectedCheckbox(Checkbox)
.
toString
public 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
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