Object Oriented Programming Through Java by Pearson

Hierarchy of Graphics Software 8.15

8.3.3 Item Event Listener

Item events are generally fired by components such as check boxes, radio buttons and combo

boxes wherein the user selects or deselects an item. To enable us to handle item events in our

program, we need to create a class that implements the ItemListener interface.

The ItemListener interface requires us to implement one method itemStateChanged-

(ItemEvent e).

The function itemStateChanged () is invoked whenever user selects

or deselects an item in the widget. Example 8.8 illustrates how to create an item event handler

and handle item events. Figure 8.8 shows the output.

Example 8.8: