Mega Code Archive

 

Categories / Java / Swing JFC

 

CardLayout Demo

import java.awt.BorderLayout; import java.awt.CardLayout; import java.awt.Color; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.BorderFactory; import javax.swing.BoxLayout; import javax.swing.ButtonGroup; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRadioButton; public class CardLayoutDemo implements ActionListener {     JPanel cards; //a panel that uses CardLayout     final static String[] strings =          {"Component 1",           "Component 2 is so long-winded it makes the container wide",           "Component 3"};     private static JComponent createComponent(String s) {         JLabel l = new JLabel(s);         l.setBorder(BorderFactory.createMatteBorder(5,5,5,5,                                                     Color.DARK_GRAY));         l.setHorizontalAlignment(JLabel.CENTER);         return l;     }     public void addCardsToPane(Container pane) {         JRadioButton[] rb = new JRadioButton[strings.length];         ButtonGroup group = new ButtonGroup();         JPanel buttons = new JPanel();         buttons.setLayout(new BoxLayout(buttons,                                         BoxLayout.PAGE_AXIS));                  for (int i= 0; i < strings.length; i++) {             rb[i] = new JRadioButton("Show component #" + (i+1));             rb[i].setActionCommand(String.valueOf(i));             rb[i].addActionListener(this);             group.add(rb[i]);             buttons.add(rb[i]);         }         rb[0].setSelected(true);                  //Create the panel that contains the "cards".         cards = new JPanel(new CardLayout());         for (int i = 0; i < strings.length; i++) {             cards.add(createComponent(strings[i]), String.valueOf(i));         }         pane.add(buttons, BorderLayout.NORTH);         pane.add(cards, BorderLayout.CENTER);     }     public void actionPerformed(ActionEvent evt) {         CardLayout cl = (CardLayout)(cards.getLayout());         cl.show(cards, (String)evt.getActionCommand());     }     public static void main(String[] args) {         JFrame.setDefaultLookAndFeelDecorated(true);         JFrame frame = new JFrame();         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);         CardLayoutDemo demo = new CardLayoutDemo();         demo.addCardsToPane(frame.getContentPane());         frame.pack();         frame.setVisible(true);     } }