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

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

        JFrame vindu = new JFrame();
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        JLabel tekst = new JLabel("Trykk p? for telle ned");
        JButton knapp = new JButton();

        panel.add(knapp);
        knapp.add(tekst);
        knapp.addActionListener(new ActionListener(){
            int teller;
            Timer timer;
            
            @Override
            public void actionPerformed(ActionEvent e){
                knapp.setEnabled(false);
                teller = 10;
                timer = new Timer(1000, new ActionListener(){

                    @Override
                    public void actionPerformed(ActionEvent e){
                        tekst.setText("Nedtelling: " + teller);
                        teller --;
                        if (teller<0){
                            timer.stop();
                            tekst.setText("Ferdig");
                            knapp.setEnabled(true);
                        }
                    }
                });
                timer.start();
            }
        });
        vindu.add(panel);
        vindu.pack(); 
        vindu.setLocationRelativeTo(null); 
        vindu.setVisible(true);
    }
    
}