import javax.swing.*;


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


        JFrame vindu = new JFrame("Dette er en JFrame");
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


        JPanel panel = new JPanel();
        JLabel tekst = new JLabel("Dette er en JLabel");
        JButton knapp = new JButton("Dette er en JButton");
        panel.add(tekst); panel.add(knapp); 
        vindu.add(panel);



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