From Forum Nokia Wiki

The following code creates a Form with an Exclusive and a Multiple 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 CourseEXCL = new ChoiceGroup ("Exclusive choice",
                                            Choice.EXCLUSIVE,new String[]
                                           {"Python", "J2ME", "Symbian"}, null);
        form.append(CourseEXCL);
        ChoiceGroup CourseMULT = new ChoiceGroup ("Multiple choice",
                                                  Choice.MULTIPLE,new String[]
                                            {"Python","J2ME", "Symbian"}, null);
        form.append(CourseMULT);
        display.setCurrent(form);
    }
}