Java by API/java.awt/CardLayout

CardLayout: next(Container parent)

import java.awt.CardLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class MainClass {
  public static void main(String[] args) {
    JFrame aWindow = new JFrame();
    aWindow.setBounds(200, 200, 200, 200);
    aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = aWindow.getContentPane();
    content.add(new CardLayoutPanel());
    aWindow.setVisible(true);
  }
}
class CardLayoutPanel extends JPanel implements ActionListener {
  CardLayout card = new CardLayout(50, 50);
  public CardLayoutPanel() {
    setLayout(card);
    JButton button;
    for (int i = 1; i <= 6; i++) {
      add(button = new JButton("Press " + i), "Card" + i);
      button.addActionListener(this);
    }
  }
  // Handle button events
  public void actionPerformed(ActionEvent e) {
    card.next(this);
  }
}

new CardLayout(int hgap, int vgap)

import java.awt.CardLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class MainClass {
  public static void main(String[] args) {
    JFrame aWindow = new JFrame();
    aWindow.setBounds(200, 200, 200, 200);
    aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = aWindow.getContentPane();
    content.add(new CardLayoutPanel());
    aWindow.setVisible(true);
  }
}
class CardLayoutPanel extends JPanel implements ActionListener {
  CardLayout card = new CardLayout(50, 50);
  public CardLayoutPanel() {
    setLayout(card);
    JButton button;
    for (int i = 1; i <= 6; i++) {
      add(button = new JButton("Press " + i), "Card" + i);
      button.addActionListener(this);
    }
  }
  // Handle button events
  public void actionPerformed(ActionEvent e) {
    card.next(this);
  }
}