Item Listener

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class RadioButtons extends MIDlet
implements ItemStateListener, CommandListener
{
private Display display;
private Form form;
private Command exit;
private Item selection;
private ChoiceGroup radioButtons;
private int defaultIndex;
private int radioButtonsIndex;
public RadioButtons()
{
display = Display.getDisplay(this);
radioButtons = new ChoiceGroup(
"Select Your Color",
Choice.EXCLUSIVE);
radioButtons.append("Red", null);
radioButtons.append("White", null);
radioButtons.append("Blue", null);
radioButtons.append("Green", null);
defaultIndex = radioButtons.append("All", null);
radioButtons.setSelectedIndex(defaultIndex, true);
exit = new Command("Exit", Command.EXIT, 1);
form = new Form("");
radioButtonsIndex = form.append(radioButtons);
form.addCommand(exit);
form.setCommandListener(this);
form.setItemStateListener(this);
}
public void startApp()
{
display.setCurrent(form);
}
public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
}
public void commandAction(Command command,
Displayable displayable)
{
if (command == exit)
{
destroyApp(true);
notifyDestroyed();
}
}
public void itemStateChanged(Item item)
{
if (item == radioButtons)
{
StringItem msg = new StringItem(Your color is ",
radioButtons.getString(radioButtons.getSelectedIndex()));
form.append(msg);
}
}
}