J2ME Java Tutorial

import java.io.IOException;
import javax.microedition.lcdui.ChoiceGroup;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Image;
import javax.microedition.midlet.MIDlet;
public class ChoiceGroupMIDlet extends MIDlet {
  protected Display display;
  protected void startApp() {
    display = Display.getDisplay(this);
    Form form = new Form("Demo");
    form.append("line");
        try {
          Image red = Image.createImage("/red.png");
          Image green = Image.createImage("/green.png");
          Image blue = Image.createImage("/blue.png");
    
          String[] strings = new String[] { "Red", "Green", "Blue" };
          Image[] images = new Image[] { red, green, blue };
          ChoiceGroup exGroup = new ChoiceGroup("Choose one", ChoiceGroup.EXCLUSIVE,
                                                      strings, images);
          form.append(exGroup);
          ChoiceGroup multiGroup = new ChoiceGroup("Choose any", ChoiceGroup.MULTIPLE);
          form.append(multiGroup);
          multiGroup.append("Use SSL", null);
          multiGroup.append("Reconnect on failure", null);
          multiGroup.append("Enable tracing", null);
       } catch (IOException ex) {
          form.append("Failed to load images");
       }
    display.setCurrent(form);
  }
  protected void pauseApp() {
  }
  protected void destroyApp(boolean unconditional) {
  }
}