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

public class sum2tal extends Applet implements ActionListener
{
     TextField tekstFelt_addend1 = new TextField(5);
     TextField tekstFelt_addend2 = new TextField(5);
     TextField tekstFelt_sum = new TextField(5);
          
     public void init()
     {
       Label label_addender = new Label("Angiv de 2 addender:");
       Label label_sum = new Label("Summen af tallene er:");
       Button beregnKnap = new Button("Beregn summen");
       beregnKnap.addActionListener(this);
       Panel panel_op = new Panel();
       Panel panel_ned = new Panel();
       setLayout(new GridLayout(2,1));
       tekstFelt_addend1.setBackground(Color.white);
       tekstFelt_addend2.setBackground(Color.white);
       tekstFelt_sum.setBackground(Color.white);
       panel_op.add(label_addender);
       panel_op.add(tekstFelt_addend1);
       panel_op.add(tekstFelt_addend2);
       panel_op.add(beregnKnap);
       add(panel_op);
       panel_ned.add(label_sum);
       panel_ned.add(tekstFelt_sum);
       add(panel_ned);
     }

     public void actionPerformed (ActionEvent evt)
     {
         
       int tal1 = Integer.parseInt(tekstFelt_addend1.getText());
       int tal2 = Integer.parseInt(tekstFelt_addend2.getText());
       tekstFelt_sum.setText(String.valueOf(tal1+tal2));
	 } 
}