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

class Counter {
    private static int count = 0;

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

        JFrame vindu = new JFrame("Counter");
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel();
        vindu.add(panel);

        JButton counterButton = new JButton("Count: " + count);

        counterButton.addActionListener(e -> {
            count++;
            counterButton.setText("Count: " + count);
        });

        panel.add(counterButton);

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