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


public class ToKnapper {
    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
        } catch (Exception e) { System.exit(1); }


        JFrame vindu = new JFrame("To knapper");
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel();
        JButton knapp1 = new JButton("Knapp 1"), knapp2 = new JButton("Knapp 2");
        panel.add(knapp1); panel.add(knapp2);

        //Det er Event Dispatch Thread, og alts? ikke main-tr?den, som skriver til terminalen.
        //ActionListener er et interface der actionPerformed m? implementeres
        knapp1.addActionListener(new ActionListener() {
            @Override public void actionPerformed(ActionEvent e) {
                System.out.println("Du trykket p? Knapp 1");
            }
        });
        knapp2.addActionListener(new ActionListener() {
            @Override public void actionPerformed(ActionEvent e) {
                System.out.println("Du trykket p? Knapp 2");
            }
        });


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