From Forum Nokia Wiki

The following code creates a Form with a Popup Choice Group.

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
 
public class Choice_Group extends MIDlet 
{
   Display display=Display.getDisplay(this);
    
    public void startApp() 
    {
        Form form = new Form("Form example");
        //ChoiceGroup(label,type,elements,image)
        ChoiceGroup CoursePOP = new ChoiceGroup ("Pop Up choice", Choice.POPUP,
                               new String[] {"Python", "J2ME","Symbian"}, null);
        form.append(CoursePOP);
        display.setCurrent(form);
    }
}

The following screen shot is an outcome.