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

public class Kalkulaator2 extends MIDlet implements CommandListener{
  TextField tf1=new TextField("Esimene arv", "", 5, TextField.NUMERIC);
  TextField tf2=new TextField("Teine arv", "", 5, TextField.NUMERIC);
  StringItem vastus=new StringItem("Vastus", "");
  String[] tehted={"+", "-", "*", "/"};
  List nimistu=new List("Tehte valik", List.EXCLUSIVE, tehted, null);
  StringItem silt=new StringItem("Tehe", "+");
  Command c1=new Command("Arvuta", Command.SCREEN, 1);
  Command c2=new Command("Välju", Command.EXIT, 1);
  Command c3=new Command("Vali tehe", Command.SCREEN, 1);
  Command c4=new Command("Tehe valitud", Command.SCREEN, 1);
  Form f=new Form("Arvutaja");
  public Kalkulaator2(){
    f.append(tf1);
    f.append(silt);
    f.append(tf2);
    f.append(vastus);
    f.addCommand(c1);
    f.addCommand(c2);
    f.addCommand(c3);
    nimistu.addCommand(c4);
    f.setCommandListener(this);
    nimistu.setCommandListener(this);
    Display.getDisplay(this).setCurrent(f);
  }
  protected void startApp( ) throws MIDletStateChangeException{}
  protected void pauseApp( ){}
  protected void destroyApp( boolean p1 ) throws MIDletStateChangeException{	}

  void arvuta(){
    int arv1=Integer.parseInt(tf1.getString());
    int arv2=Integer.parseInt(tf2.getString());
    String tulemus="";
    if(silt.getText().equals("+")){tulemus=String.valueOf(arv1+arv2);}
    if(silt.getText().equals("-")){tulemus=String.valueOf(arv1-arv2);}
    if(silt.getText().equals("*")){tulemus=String.valueOf(arv1*arv2);}
    if(silt.getText().equals("/")){tulemus=String.valueOf(arv1/arv2);}
    vastus.setText(tulemus);
  }

  public void commandAction( Command p1, Displayable p2 ){
    if (p1==c1){
      arvuta();
    }
    if(p1==c2){
      notifyDestroyed();
    }
    if(p1==c3){
      Display.getDisplay(this).setCurrent(nimistu);
    }
    if(p1==c4){
      silt.setText(nimistu.getString(nimistu.getSelectedIndex()));
      Display.getDisplay(this).setCurrent(f);
    }
  }
}