[uncopywritable]

This must be a classic 'if I had a dollar' kind of question, but I'm confused about calling methods in other classes. The problem snippet is:

Code:

 Card card = new Card();
 card.Card();

- which to the best of my knowledge should work, but doesn't. What I want to do, for the purpose of experimenting with CardLayout, is initiate the Card Layout tutorial (in the class Card) from another class by calling the method Card();. Here's the whole thing:

Code:

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

public class Menu {
 
    
    public static void main(String[] args) {
    JFrame frame = new JFrame("Menu");
   
    frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
    frame.setSize(1200,800);
    frame.setVisible(true);

    
            }
    
  
    Card card = new Card();
    card.main();

    
    }


 class Card extends JPanel {
  CardLayout cards = new CardLayout();

  public Card() {
    setLayout(cards);
    ActionListener listener = new ActionListener() {
      public void actionPerformed(ActionEvent e) {
	cards.next(Card.this);
      }
    };
    JButton button;
    button = new JButton("one");
    button.addActionListener(listener);
    add(button,	"one");
    button = new JButton("two");
    button.addActionListener(listener);
    add(button,	"two");
    button = new JButton("three");
    button.addActionListener(listener);
    add(button,	"three");
  }

  public static	void main(String[] args) {
    JFrame frame = new JFrame("Card");
    frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
    frame.setSize(200, 200);
    frame.setLocation(200, 200);
    frame.setContentPane(new Card());
    frame.setVisible(true);
  }
}