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

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

    JPanel panel = new JPanel();
    vindu.add(panel);

    panel.setLayout(new GridLayout(2, 3));

    for (int i = 0; i < 2 * 3; i++) {
      panel.add(new SmilKnapp(String.valueOf(i + 1)));
    }


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

class SmilKnapp extends JButton {
  private String tall;

  public SmilKnapp(String tekst) {
    super(tekst);
    this.tall = tekst;
    this.initGUI();
  }

  class Smiley implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
      if (getText().equals(tall)) {
        setText(":)");
      } else {
        setText(tall);
      }
    }
  }

  public void initGUI() {
    addActionListener(new Smiley());
  }

}