import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

import javax.swing.*;

class SmileKnapp {
    public static void main(String[] args) {
        JFrame vindu = new JFrame("Test");
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


        vindu.setMinimumSize(new Dimension(200, 200));


        JPanel ruter = new JPanel();
        ruter.setLayout(new GridLayout(2,3));
        for (int i = 0; i < 6; i++) {
            Knapp b = new Knapp(i+"");
            b.initGUI();;

            ruter.add(b);
        }
        vindu.add(ruter);


        
        
        vindu.pack();
        vindu.setVisible(true);

    }
    static class Knapp extends JButton {

        class Eventer implements ActionListener {

            boolean clicked = false;
            String old = "";

            @Override
            public void actionPerformed(ActionEvent e) {
                if (clicked) {
                    ((JButton) e.getSource()).setText(old);
                    clicked = false;
                } else {
                    old = ((JButton) e.getSource()).getText();
                    ((JButton) e.getSource()).setText(":)");
                    clicked = true;
                }

            }

        }

        Knapp(String t){
            super(t);
        }
        
        void initGUI() {
            addActionListener(new Eventer());
        }

}
    
}