import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.UIManager;




class GUIEks
{
    static class IndreKnapp implements ActionListener
    {
        @Override
        public void actionPerformed(ActionEvent e) 
        {
            System.exit(0);
        }
    }

    public static void main(String[] args) 
    {
        try {
            UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
        } catch (Exception e) {
            System.exit(1);
        }
        JFrame ramme = new JFrame("Laise");
        ramme.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JButton knapp = new JButton("Hallo");
        knapp.addActionListener(new IndreKnapp());
        ramme.add(knapp);
        ramme.pack();
        ramme.setVisible(true);
    }
}