The CardLayout class manages components so that only one is visible at a time. It treats each component as a "card". Constructors include CardLayout() and CardLayout(int hgap, int vgap). Commonly used methods are next(), previous(), first(), last(), and show() for flipping between cards. An example program demonstrates using CardLayout to flip between JButtons when they are clicked. It sets the layout, adds buttons as cards, and uses action listeners and the next() method to flip on button clicks.

1.  CARD LAYOUT
PRESENTED :
H.KAJAMOINUDEEN MCA..,

2. Card Layout class :
The Card Layout class manages the components in such a
manner that only one component is visible at a time. It treats each component
as a card that is why it is known as Card Layout Constructors of Card Layout
class:
Card Layout(): creates a card layout with zero horizontal and vertical gap.
Card Layout(int hgap, int vgap): creates a card layout with the given horizontal
and vertical gap.

3. COMMONLY USED METHODS OF CARD LAYOUT CLASS:
public void next(Container parent): is used to flip to the next card of the given
container.
public void previous(Container parent): is used to flip to the previous card of
the given container.
public void first(Container parent): is used to flip to the first card of the given
container.
public void last(Container parent): is used to flip to the last card of the given
container.
public void show(Container parent, String name): is used to flip to the specified
card with the given name.

4. EXAMPLE PROGRAM
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class CL extends JFrame implements ActionListener{
CardLayout card;
JButton b1,b2,b3,b4;
Container c;
CL(){
c=getContentPane();
card=new CardLayout(40,30);
//create CardLayout object with 40 hor space and 30 ver space
c.setLayout(card);
b1=new JButton("KAJAMOINUDEEN");
b2=new JButton("VISHAL");
b3=new JButton("GOWTHAMI");
b4=new JButton("GOPI");

5. b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
c.add("a",b1);c.add("b",b2);c.add("c",b3);c.add("d",b4);
}
public void actionPerformed(ActionEvent e) {
card.next(c);
}
public static void main(String[] args) {
CardLayoutExample cl=new CardLayoutExample();
cl.setSize(400,400);
cl.setVisible(true);
cl.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
}

6. 2. EXAMPLE PROGRAM
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class SwingLayoutDemo {
private JFrame mainFrame;
private JLabel headerLabel;
private JLabel statusLabel;
private JPanel controlPanel;
private JLabel msglabel;
public SwingLayoutDemo(){
prepareGUI();
}
public static void main(String[] args){
SwingLayoutDemo swingLayoutDemo = new SwingLayoutDemo();
swingLayoutDemo.showCardLayoutDemo();
}

7. private void prepareGUI(){
mainFrame = new JFrame("Java SWING Examples");
mainFrame.setSize(400,400);
mainFrame.setLayout(new GridLayout(3, 1));
headerLabel = new JLabel("",JLabel.CENTER );
statusLabel = new JLabel("",JLabel.CENTER);
statusLabel.setSize(350,100);
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
System.exit(0);
}
});
controlPanel = new JPanel();
controlPanel.setLayout(new FlowLayout());
mainFrame.add(headerLabel);
mainFrame.add(controlPanel);
mainFrame.add(statusLabel);
mainFrame.setVisible(true);
}

8. private void showCardLayoutDemo(){
headerLabel.setText("Layout in action: CardLayout");
final JPanel panel = new JPanel();
panel.setBackground(Color.CYAN);
panel.setSize(300,300);
CardLayout layout = new CardLayout();
layout.setHgap(10);
layout.setVgap(10);
panel.setLayout(layout);
JPanel buttonPanel = new JPanel(new FlowLayout());
buttonPanel.add(new JButton("OK"));
buttonPanel.add(new JButton("Cancel"));
JPanel textBoxPanel = new JPanel(new FlowLayout());
textBoxPanel.add(new JLabel("Name:"));
textBoxPanel.add(new JTextField(20));
panel.add("Button", buttonPanel);
panel.add("Text", textBoxPanel);

9. final DefaultComboBoxModel panelName = new DefaultComboBoxModel();
panelName.addElement("Button");
panelName.addElement("Text");
final JComboBox listCombo = new JComboBox(panelName);
listCombo.setSelectedIndex(0);
JScrollPane listComboScrollPane = new JScrollPane(listCombo);
JButton showButton = new JButton("Show");
showButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String data = "";
if (listCombo.getSelectedIndex() != -1) {
CardLayout cardLayout = (CardLayout)(panel.getLayout());
cardLayout.show(panel,
(String)listCombo.getItemAt(listCombo.getSelectedIndex()));
}
statusLabel.setText(data);
}

10. });
controlPanel.add(listComboScrollPane);
controlPanel.add(showButton);
controlPanel.add(panel);
mainFrame.setVisible(true);
}
}