Checkboxes are on-off toggles implemented as
-
Checkbox red = new Checkbox("Red");
-
Checkbox green = new Checkbox("Green");
-
Checkbox blue = new Checkbox("Blue",null, true);
-
add(red); add(green); add(blue);
|
|
The first two are initially set to "false" as the optional third argument is not given. The last one is initially set to "true".
|
The state of a checkbox, i.e. whether it is checked, is given by a boolean result of the method, getState:
-
if (red.getState()) . . .;
|
|
If a user clicks a Checkbox, an ItemEvent is generated. The listener must implement ItemListener with the one method itemStateChanged (ItemEvent e).
|
|
Red
|
|
Green
|
|
Blue
|
