control and method of checkbox in awt
Checkbox
class:
This
class is used to create the check box control. This will create a small box and
label in front of it. If we click in the box the check mark will appear in it.
The Constructors of the Checkbox control:
a) Checkbox()
It will create the Checkbox with no Label
information with it.
b) Checkbox(String s)
It will create the Checkbox with string s
containing the information to be displayed in the label in front of the check
box
c) Checkbox(String
s,boolean state,CheckboxGroup cg)
It will create the Checkbox with string s
containing the information to be displayed in the label in front of the check
box
The state argument will specify the state of
the check box. If we specify the state as
true then the check mark will appear in the check box otherwise not
Checkgroup class is used for creating the
Radio Buttons , which we will discuss latter.
d) Checkbox(String
s,CheckboxGroup cg,boolean state)
Similar
to the (c) constructor except the sequence of argument is different.
Method:
Method Description
1. setLabel() This is used to set
the information to be displayted in the front of the Check box control. The
general form is ,
void
setLabel(String s)
where,
s
will specify the information
2. getLabel() This method is used
to access the information being displayed in front of the check box control. The
general form is ,
String
getLabel()
3. setState() This
method is used to set the state of the check box
The
general form is ,
void
setState(boolean state)
where
state can either be true or false. If true then the check mark will appear and
if false the check mark will not appear.
4. getState() This
method is used to access the state of
the Checkbox object.
The
general form is ,
boolean
getState()
5. addItemListener() This method is used
to register the Checkbox object to recieve
the click event.
The
general form is ,
void
addItemListener(ItemEvent il)
6. removeItemListener() This method is used to
unregister the Checkbox object to recieve the click event
The
general form is ,
void
removeItemListener(ItemEvent il)
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