public static void addComponentsToPane(Container pane) {。。。}

private static void createAndShowGUI() {
    // Create and set up the window.
    JFrame frame = new JFrame("FlowLayoutDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    // Set up the content pane.
    addComponentsToPane(frame.getContentPane());
    // Display the window.
    frame.pack();
    frame.setVisible(true);
}

public static void main(String[] args) {
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
       public void run() {
           createAndShowGUI();
       }
    });
}

public static void addComponentsToPane(Container pane) {
    pane.setLayout(new FlowLayout());
    pane.add(new JButton("Button 1"));
    pane.add(new JButton("Button 2"));
    pane.add(new JButton("Button 3"));
    pane.add(new JButton("Long-Named Button 4"));
    pane.add(new JButton("5"));
}

public static void addComponentsToPane(Container pane) {      
    JButton button = new JButton("Button 1 (PAGE_START)");
    pane.add(button, BorderLayout.PAGE_START);     
    button = new JButton("Button 2 (CENTER)");
    button.setPreferredSize(new Dimension(200, 100));
    pane.add(button, BorderLayout.CENTER);   
    button = new JButton("Button 3 (LINE_START)");
    pane.add(button, BorderLayout.LINE_START);     
    button = new JButton("Long-Named Button 4 (PAGE_END)");
    pane.add(button, BorderLayout.PAGE_END);      
}

public static void addComponentsToPane(Container pane) {
    JPanel xPanel = new JPanel();
    xPanel.setLayout(new BoxLayout(xPanel, BoxLayout.X_AXIS));
    addButtons(xPanel);
    JPanel yPanel = new JPanel();
    yPanel.setLayout(new BoxLayout(yPanel, BoxLayout.Y_AXIS));
    addButtons(yPanel);
   
    pane.add(yPanel, BorderLayout.PAGE_START);
    pane.add(xPanel, BorderLayout.PAGE_END);
}
 
private static void addAButton(String text, Container container) {
    JButton button = new JButton(text);
    button.setAlignmentX(Component.CENTER_ALIGNMENT);
    container.add(button);
}
 
private static void addButtons(Container container) {
    addAButton("Button 1", container);
    addAButton("Button 2", container);
    addAButton("Button 3", container);
    addAButton("Long-Named Button 4", container);
    addAButton("5", container);
}

public void addComponentToPane(Container pane) {
    final JPanel contentPanel = new JPanel();
    JPanel controlPanel = new JPanel();
    final CardLayout cardLayout=new CardLayout();;
    pane.setLayout(new BorderLayout());
    pane.add(contentPanel, BorderLayout.CENTER);
    pane.add(controlPanel, BorderLayout.PAGE_END);
    controlPanel.setLayout(new FlowLayout());
 
    JButton[] b = new JButton[10];
    for (int i = 0; i < 10; i++) {
       b[i] = new JButton("No." + i);
       contentPanel.add(b[i]);
    }
    contentPanel.setLayout(cardLayout);
    JButton nextButton = new JButton("next");
    nextButton.addActionListener(new ActionListener(){
       public void actionPerformed(ActionEvent e) {
           cardLayout.next(contentPanel);
       }});
    controlPanel.add(nextButton);
}

public static void addComponentsToPane(Container pane) {
    JButton[] buttons = new JButton[9];
    pane.setLayout(new GridLayout(3, 3));
    for (int i = 0; i < buttons.length; i++) {
       buttons[i] = new JButton(i + "");
       pane.add(buttons[i]);
    }
}

public static void addComponentsToPane(Container pane) {
    JButton button;
    pane.setLayout(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();
 
    button = new JButton("Button 1");
    c.fill = GridBagConstraints.HORIZONTAL;
    c.gridx = 0;
    c.gridy = 0;
    pane.add(button, c);
 
    button = new JButton("Button 2");
    c.fill = GridBagConstraints.HORIZONTAL;
    c.weightx = 0.5;
    c.gridx = 1;
    c.gridy = 0;
    pane.add(button, c);
 
    button = new JButton("Button 3");
    c.fill = GridBagConstraints.HORIZONTAL;
    c.weightx = 0.5;
    c.gridx = 2;
    c.gridy = 0;
    pane.add(button, c);
 
    button = new JButton("Long-Named Button 4");
    c.fill = GridBagConstraints.HORIZONTAL;
    c.ipady = 40; // make this component tall
    c.weightx = 0.0;
    c.gridwidth = 3;
    c.gridx = 0;
    c.gridy = 1;
    pane.add(button, c);
 
    button = new JButton("5");
    c.fill = GridBagConstraints.HORIZONTAL;
    c.ipady = 0; // reset to default
    c.weighty = 1.0; // request any extra vertical space
    c.anchor = GridBagConstraints.PAGE_END; // bottom of space
    c.insets = new Insets(10, 0, 0, 0); // top padding
    c.gridx = 1; // aligned with button 2
    c.gridwidth = 2; // 2 columns wide
    c.gridy = 2; // third row
    pane.add(button, c);
    }