gistfile1.txt

import java.util.*;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;
import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
/**
 * Lav en beskrivelse af klassen RoadGUI her.
 * 
 * @author (dit navn her)
 * @version (versions nummer eller dato her)
 */
public class RoadGUI
{
    public static JFrame frame = new JFrame();
    private ArrayList<ChangeListener> listeners;
    public static Counter counter = new Counter(0);
    public static JTextArea skærm = new JTextArea("0 frie P-pladser");
    
    public RoadGUI(Counter c){
        this.counter = c;
    }
 
    public static ActionListener createButtonListener()
    {
        return new ChangeListener() {
                public void stateChanged(ChangeEvent event)
                {
                  skærm.setText(String.valueOf(counter.getValue()) + " P-pladser");
                  frame.repaint();
                }
        };
    }
    
    public static void main(String[] args)
    {       
        frame.setLayout(new FlowLayout());
 
        frame.add(skærm);
 
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }
}