// CardDeck.java // Demonstrating CardLayout. import javax.swing.*; import java.awt.*; import java.awt.event.*; public class CardDeck extends JFrame implements ActionListener { private CardLayout cardManager; private JPanel deck; private JButton controls[]; private String names[] = { "First card", "Next card", "Previous card", "Last card" }; public CardDeck() { super( "CardLayout " ); Container c = getContentPane(); // create the JPanel with CardLayout deck = new JPanel(); cardManager = new CardLayout(); deck.setLayout( cardManager ); // set up card1 and add it to JPanel deck JLabel label1 = new JLabel( "card one", SwingConstants.CENTER ); JPanel card1 = new JPanel(); card1.add( label1 ); deck.add( card1, label1.getText() ); // add card to deck // set up card2 and add it to JPanel deck JLabel label2 = new JLabel( "card two", SwingConstants.CENTER ); JPanel card2 = new JPanel(); card2.setBackground( Color.yellow ); card2.add( label2 ); deck.add( card2, label2.getText() ); // add card to deck // set up card3 and add it to JPanel deck JLabel label3 = new JLabel( "card three" ); JPanel card3 = new JPanel(); card3.setLayout( new BorderLayout() ); card3.add( new JButton( "North" ), BorderLayout.NORTH ); card3.add( new JButton( "West" ), BorderLayout.WEST ); card3.add( new JButton( "East" ), BorderLayout.EAST ); card3.add( new JButton( "South" ), BorderLayout.SOUTH ); card3.add( label3, BorderLayout.CENTER ); deck.add( card3, label3.getText() ); // add card to deck // create and layout buttons that will control deck JPanel buttons = new JPanel(); buttons.setLayout( new GridLayout( 2, 2 ) ); controls = new JButton[ names.length ]; for ( int i = 0; i < controls.length; i++ ) { controls[ i ] = new JButton( names[ i ] ); controls[ i ].addActionListener( this ); buttons.add( controls[ i ] ); } // add JPanel deck and JPanel buttons to the applet c.add( buttons, BorderLayout.WEST ); c.add( deck, BorderLayout.EAST ); setSize( 450, 200 ); show(); } public void actionPerformed( ActionEvent e ) { if ( e.getSource() == controls[ 0 ] ) cardManager.first( deck ); // show first card else if ( e.getSource() == controls[ 1 ] ) cardManager.next( deck ); // show next card else if ( e.getSource() == controls[ 2 ] ) cardManager.previous( deck ); // show previous card else if ( e.getSource() == controls[ 3 ] ) cardManager.last( deck ); // show last card } public static void main( String args[] ) { CardDeck cardDeckDemo = new CardDeck(); cardDeckDemo.addWindowListener( new WindowAdapter() { public void windowClosing( WindowEvent e ) { System.exit( 0 ); } } ); } }
import java.awt.*; import java.awt.event.*; import javax.swing.*; public class CardWindow extends JFrame implements ItemListener { boolean inAnApplet = true; JPanel cards; final static String BUTTONPANEL = "JPanel with JButtons"; final static String TEXTPANEL = "JPanel with JTextField"; public CardWindow() { Container contentPane = getContentPane(); //Put the JComboBox in a JPanel to get a nicer look. String comboBoxItems[] = { BUTTONPANEL, TEXTPANEL }; JPanel cbp = new JPanel(); JComboBox c = new JComboBox(comboBoxItems); c.setEditable(false); c.addItemListener(this); cbp.add(c); //Use the default layout manager, BorderLayout contentPane.add(cbp, BorderLayout.NORTH); cards = new JPanel(); cards.setLayout(new CardLayout()); JPanel p1 = new JPanel(); p1.add(new JButton("Button 1")); p1.add(new JButton("Button 2")); p1.add(new JButton("Button 3")); JPanel p2 = new JPanel(); p2.add(new JTextField("TextField", 20)); cards.add(p1, BUTTONPANEL); cards.add(p2, TEXTPANEL); contentPane.add(cards, BorderLayout.CENTER); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { if (inAnApplet) { dispose(); } else { System.exit(0); } } }); } public void itemStateChanged(ItemEvent evt) { CardLayout cl = (CardLayout)(cards.getLayout()); cl.show(cards, (String)evt.getItem()); } public static void main(String args[]) { CardWindow window = new CardWindow(); window.inAnApplet = false; window.setTitle("CardLayout"); window.pack(); window.setVisible(true); } }
Maintained by John Loomis, last updated 20 June 2000