Write a MIDlet program for Alert class.

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;

public class DisplayAlert extends MIDlet implements CommandListener

{

private Display display;

private Alert alert;

private Form form;

private Command exit;

private boolean exitFlag;

public DisplayAlert()

{

exitFlag = false;

display = Display.getDisplay(this);

exit = new Command("Exit", Command.SCREEN, 1);

form = new Form("Throw Exception");

form.addCommand(exit);

form.setCommandListener(this);

}

public void startApp()

{

display.setCurrent(form);

}

public void pauseApp()

{

}

public void destroyApp(boolean unconditional) throws MIDletStateChangeException

{

if (unconditional == false)

{

throw new MIDletStateChangeException();

}

}

public void commandAction(Command command, Displayable displayable)

{

          if (command == exit)

                   {

                   try

                             {

                             if (exitFlag == false)

                             {

                   alert = new Alert("Busy", "Please try again.",null, AlertType.WARNING);

                   alert.setTimeout(Alert.FOREVER);

                   display.setCurrent(alert, form);

                   destroyApp(false);

                             }

                             else

                             {

                             destroyApp(true);

                             notifyDestroyed();

                             }

                   }

                             catch (MIDletStateChangeException exception)

                             {

                             exitFlag = true;

                             } }      }    }