مساعدة

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.ItemCommandListener;
import javax.microedition.lcdui.StringItem;
import javax.microedition.midlet.MIDlet;

public class ReadDisplayFile extends MIDlet implements ItemCommandListener {

    private Display display;
    Form form;
    Command select;
    StringItem calculate;

    public ReadDisplayFile() {
        display = Display.getDisplay(this);

        form = new Form("Button Test");
        calculate = new StringItem("", "Calculate", StringItem.BUTTON);
        select = new Command("Select", Command.ITEM, 0);
        form.append(calculate);
        calculate.setDefaultCommand(select);
        calculate.setItemCommandListener(this);
    }

    public void startApp() {
        display.setCurrent(form);
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }

    public void commandAction(Command c, Item item) {
        System.out.println("Button Action Here");

    }
}

مشكور يا اخي الفاضل على الرد الكافي و الوافي.