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

public class Kalkulaator extends MIDlet implements CommandListener{
  TextField tf1=new TextField("Esimene arv", "", 5, TextField.NUMERIC);
  TextField tf2=new TextField("Teine arv", "", 5, TextField.NUMERIC);
  TextField tf3=new TextField("Vastus", "", 5, TextField.NUMERIC);
  Command c1=new Command("Arvuta", Command.SCREEN, 1);
  Command c2=new Command("Välju", Command.EXIT, 1);
  Form f=new Form("Arvutaja");
  public Kalkulaator(){
    f.append(tf1);
    f.append(tf2);
    f.append(tf3);
    f.addCommand(c1);
    f.addCommand(c2);
    f.setCommandListener(this);
    Display.getDisplay(this).setCurrent(f);
  }
  protected void startApp( ) throws MIDletStateChangeException{}
  protected void pauseApp( ){}
  protected void destroyApp( boolean p1 ) throws MIDletStateChangeException{	}

  public void commandAction( Command p1, Displayable p2 ){
     if(p1==c1){
       tf3.setString(String.valueOf(Integer.parseInt(tf1.getString())+Integer.parseInt(tf2.getString())));
     }
     if(p1==c2){
       notifyDestroyed();
     }
  }
}