Java ME (Java Platform, Micro Edition) MCQ

What will happen on attempting to compile and run the following code?
public class ERMidlet extends MIDlet implements CommandListener, Runnable
{
        private Display mDisplay;
        private Form myForm;
        private Command exitCommand;
        private StringItem myString;

        ERMidlet()
        {
                myForm = new Form("Expert Rating Exam");
                exitCommand = new Command("Exit",Command.EXIT, 0);
                myString = new StringItem("15");
                myForm.append(myString);

                myForm.addCommand(exitCommand);
                myForm.setCommandListener(this);

        }

        public void startApp()
        {
                mDisplay = Display.getDisplay(this);
                mDisplay.setCurrent(myForm);
        }

        public void commandAction (Command c, Displayable s)
        {
                destroyApp(false);
                notifyDestroyed();
        }

        public void run()
        {
        }

        public void pauseApp()
        {
        }

        public void destroyApp(boolean unconditional)
        {
        }

It will display 15 on the devices screen

The code will not compile

The code will compile but will throw a runtime exception

It will not display anything  

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