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

class Eksempel {

    public static void main(String[] args) {
        JFrame vindu = new JFrame("Mitt fine vindu");
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel();
        vindu.add(panel);
        JLabel tekst = new JLabel("Hallo! Har du det bra?");
        panel.add(tekst);
        JButton jaKnapp = new JButton("Ja ?");
        panel.add(jaKnapp);
        JButton neiKnapp = new JButton("Nei ?");
        panel.add(neiKnapp);
        class JaLytter implements ActionListener {

            @Override
            public void actionPerformed(ActionEvent e) {
                tekst.setText("Hurra!");
                jaKnapp.setVisible(false);
                neiKnapp.setVisible(false);
            }
        }
        jaKnapp.addActionListener(new JaLytter());
        class NeiLytter implements ActionListener {

            @Override
            public void actionPerformed(ActionEvent e) {
                tekst.setText(
                    "Ikke heng med nebbet, etter regn kommer sol!?????????????"
                );
                jaKnapp.setVisible(false);
                neiKnapp.setVisible(false);
            }
        }
        neiKnapp.addActionListener(new NeiLytter());

        vindu.pack();
        vindu.setLocationRelativeTo(null);
        vindu.setVisible(true);
    }
}