import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

public class Liida1 extends Applet implements ActionListener{
  TextField liidetav1=new TextField(5),
            liidetav2=new TextField(5),
            summa=new TextField(5);
  Label pluss=new Label("+", Label.CENTER);
  Button vordub=new Button("=");
  public void init(){
    setLayout(new GridLayout(1, 5));
    add(liidetav1);
    add(pluss);
    add(liidetav2);
    add(vordub);
    add(summa);
    vordub.addActionListener(this);
  }
  public void actionPerformed(ActionEvent e){
    summa.setText(numbriks(liidetav1)+numbriks(liidetav2)+"");
  }
  int numbriks(TextField tf){
    return Integer.parseInt(tf.getText().trim());
  }
}