import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class TestGraphic{
  private static JPanel panel;

  public static void main(String[] args) {
    JFrame vindu = new JFrame("Navn på vindu");
    vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel hovedPanel = new JPanel();
    hovedPanel.setLayout(new GridLayout(2,1));

    JLabel tekst = new JLabel("Heihei");
    hovedPanel.add(tekst);

    panel = new JPanel();
    panel.setLayout(new GridLayout(2, 2));

    hovedPanel.add(panel);
    vindu.add(hovedPanel);



    lagKnapper();

    vindu.pack();
    vindu.setVisible(true);


  }
  public static void lagKnapper(){
    class Knapp extends JButton{
      String tekst;
      String nyTekst;

      public Knapp(String tekst, String nyTekst){
        super(tekst);
        this.tekst = tekst;
        this.nyTekst = nyTekst;
      }

      class KnappAction implements ActionListener{
        @Override
        public void actionPerformed(ActionEvent e){
          System.out.println(nyTekst);
          if(getText().equals(tekst)){
            setText(nyTekst);
          }else {
            setText(tekst);
          }
        }
      }
      public void initGui(){
        addActionListener(new KnappAction());
      }
    }
    for (int i = 0; i < 4; i++){
      Knapp knapp = new Knapp("Hello", "Hade");
      knapp.initGui();
      panel.add(knapp);
    }

  }
}