Java Programing laungage

/*
 * Save as a addRadioButtons.java
 */
package r4r.Mobile.Basic;

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

/**
 * @author R4R
 */
public class addRadioButtons extends MIDlet {

     /* -- Private Field -- */
    private Display display;
    private Form form;
    private ChoiceGroup choiceOption;
    private String[] choices = {"Item 1", "Item 2",
		"Item 3", "Item 4", "Item 5"};
    private Command exit;

    /* -- Default constructor -- */
    public addRadioButtons() {
        display = Display.getDisplay(this);
        form= new Form("Add RadioButton into form");
        choiceOption= new ChoiceGroup("Choose one from List",
			Choice.EXCLUSIVE, choices, null);
        exit= new Command("EXIT", Command.EXIT, 1);
        
        // Add field into form
        form.append(choiceOption);
        form.addCommand(exit);
    }

    public void startApp() {
        form.setCommandListener(new CommandListener() {
				

            public void commandAction(Command c, Displayable d) {
                if (c== exit) {
                    destroyApp(true);
                    notifyDestroyed();
                }
            }
        });
        display.setCurrent(form);
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }
}