awt event JButton o swing event JButton

[php76]

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


class panel1 extends JPanel ActionListener{
    public static void main(String[] args){
        JFrame win;
        win = new JFrame("Prima Finestra");
        Container c = win.getContentPane();
        c.setLayout(new GridLayout(2,1));
        c.add(new JLabel("Prima Finestra"));
        c.add(new JButton("Seconda Finestra"));
        win.setSize(300,200);
        win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        win.setVisible(true);
    }
}
public void actionPerformed(ActionEvent e){
    
    
}

mi potete spiegare come faccio con event ad aprire un'altro pannello come questo chiamato panel2, grazie.